The production of renewable fuels through water splitting via photocatalytic hydrogen production holds significant promise.Nonetheless,the sluggish kinetics of hydrogen evolution and the inadequate water adsorption on...The production of renewable fuels through water splitting via photocatalytic hydrogen production holds significant promise.Nonetheless,the sluggish kinetics of hydrogen evolution and the inadequate water adsorption on photocatalysts present notable challenges.In this study,we have devised a straightforward hydrothermal method to synthesize Bi_(2)O_(3)(BO)derived from metal‐organic frameworks(MOFs),loaded with flower-like ZnIn_(2)S_(4)(ZIS).This approach substantially enhances water adsorption and surface catalytic reactions,resulting in a remarkable enhancement of photocatalytic activity.By employing triethanolamine(TEOA)as a sacrificial agent,the hydrogen evolution rate achieved with 15%(mass fraction)ZIS loading on BO reached an impressive value of 1610μmol∙h^(−1)∙g^(−1),marking a 6.34-fold increase compared to that observed for bare BO.Furthermore,through density functional theory(DFT)and ab initio molecular dynamics(AIMD)calculations,we have identified the reactions occurring at the ZIS/BO S-scheme heterojunction interface,including the identification of active sites for water adsorption and catalytic reactions.This study provides valuable insights into the development of high-performance composite photocatalytic materials with tailored electronic properties and wettability.展开更多
To increase the number of active sites and defects in TiO2 and promote rapid and efficient transfer of photogenerated charges, a g-C3N4@C-TiO2 composite photocatalyst was prepared via in situ deposition of g-C3N4 on a...To increase the number of active sites and defects in TiO2 and promote rapid and efficient transfer of photogenerated charges, a g-C3N4@C-TiO2 composite photocatalyst was prepared via in situ deposition of g-C3N4 on a carbon-doped anatase TiO2 surface. The effects of carbon doping state and surface modification of g-C3N4 on the performance of g-C3N4@C-TiO2 composite photocatalysts were studied by X-ray diffraction, X-ray photoelectron spectroscopy, UV-visible diffuse-reflectance spectroscopy, transmission electron microscopy, electrochemical impedance spectroscopy, photoluminescence, and electron paramagnetic resonance. With increasing carbon doping content, the carbon doping state in TiO2 gradually changed from gap to substitution doping. Although the number of oxygen vacancies gradually increased, the degradation efficiency of g-C3N4@C-TiO2 for RhB (phenol) initially increased and subsequently decreased with increasing carbon content. The g-C3N4@10C-TiO2 sample exhibited the highest apparent reaction rate constant of 0.036 min儃1 (0.039 min儃1) for RhB (phenol) degradation, which was 150 (139), 6.4 (6.8), 2.3 (3), and 1.7 (2.1) times higher than that of pure TiO2, 10C-TiO2, g-C3N4, and g-C3N4@TiO2, respectively. g-C3N4 was grown in situ on the surface of C-TiO2 by surface carbon hybridization and bonding. The resultant novel g-C3N4@C-TiO2 photocatalyst exhibited direct Z-scheme heterojunctions with non-local impurity levels. The high photocatalytic activity can be attributed to the synergistic effects of the improved visible light response ability, higher photogenerated electron transfer efficiency, and redox ability arising from Z-type heterojunctions.展开更多
Two-dimensional(2D)nanomaterials,such as graphene,MoS_(2),and MAX,have attracted increasing research attention in recent years due to their unique structural and performance advantages.However,their complex production...Two-dimensional(2D)nanomaterials,such as graphene,MoS_(2),and MAX,have attracted increasing research attention in recent years due to their unique structural and performance advantages.However,their complex production processes and equipment requirements are significant issues affecting their widespread use.Here,with an exfoliation strategy using three-roll milling,we present a simple,cost-effective,and extensible method to produce multilayer graphene,BN,MoS_(2),and Ti_(3)AlC_(2) nanosheets.The roller and phenolic resin created three kinds of forces on the layered 2D materials,i.e.,shear forces,compressive forces,and adhesive forces,which exfoliated layered materials from their edges and surfaces into nanosheets.Subsequently,the exfoliated materials were ultrasonically washed with alcohol,treated with ultrasonic vibration,and centrifuged to obtain 2D nanomaterials.The easy operation and high yield are attractive for research based on the construction of high-performance 2D nanosheet-based devices at low cost.Herein,the obtained multilayer graphene and MoS_(2) nanosheets were used as anode materials of sodium/potassium-ion batteries,respectively,to test their electrochemical properties.Better performances are obtained compared with their primary bulk materials.展开更多
SnRK1,an evolutionarily conserved heterotrimeric kinase complex that acts as a key metabolic sensor in maintaining energy homeostasis in plants,is an important upstream activator of autophagy that serves as a cellular...SnRK1,an evolutionarily conserved heterotrimeric kinase complex that acts as a key metabolic sensor in maintaining energy homeostasis in plants,is an important upstream activator of autophagy that serves as a cellular degradation mechanism for the healthy growth of plants.However,whether and how the autophagy pathway is involved in regulating SnRK1 activity remains unknown.In this study,we identified a clade of plant-specific and mitochondria-localized Fcs-like zinc finger(FLZ)proteins as currently unknown ATG8-interacting partners that actively inhibit SnRK1 signaling by repressing the T-loop phosphorylation of the catalyticαsubunits of SnRK1,thereby negatively modulating autophagy and plant tolerance to energy deprivation caused by long-term carbon starvation.Interestingly,these AtFLZs are transcriptionally repressed by low-energy stress,and AtFLZ proteins undergo a selective autophagy-dependent pathway to be delivered to the vacuole for degradation,thereby constituting a positive feedback regulation to relieve their repression of SnRK1 signaling.Bioinformatic analyses show that the ATG8-FLZ-SnRK1 regulatory axis first appears in gymnosperms and seems to be highly conserved during the evolution of seed plants.Consistent with this,depletion of ATG8-interacting ZmFLZ14 confers enhanced tolerance,whereas overexpression of ZmFLZ14 leads to reduced tolerance to energy deprivation in maize.Collectively,our study reveals a previously unknown mechanism by which autophagy contributes to the positive feedback regulation of SnRK1 signaling,thereby enabling plants to better adapt to stressful environments.展开更多
Due to its larger ionic radius,further studies are needed before graphite can be used as an anode for sodium/potassium-ion batteries(SIBs/KIBs).It is believed that doping and increasing the layer spacing can improve t...Due to its larger ionic radius,further studies are needed before graphite can be used as an anode for sodium/potassium-ion batteries(SIBs/KIBs).It is believed that doping and increasing the layer spacing can improve the Na+/K+storage.Herein,S/N co-doped graphite nanosheets(GNS)with an enlarged interlayer spacing of 0.39 nm were prepared via exfoliation with three-roll milling(TRM)combined with thiourea heated at different temperatures.This method generates abundant defects and active sites for GNS,as well as facilitates rapid access and transport of electrolytes and electrons/ions.The electrochemical results show that the S/N-doped GNS exfoliated 15 times and heated at 600°C(SNGNS15-600)with thiourea as the electrode delivers a discharge capacity of 94 mAh g–1 over 6000 cycles at 10 A g–1 with an enhanced rate capability and stable performance for application in SIBs.Calculations using density functional theory show that the increased interlayer spacing by TRM and S,N co-doping enhances the adsorption energies of Na+on graphite,thus improving the Na+storage.As the anode for KIBs,the SNGNS15-600 electrode has a capacity of 142 mAh g–1 after 5000 cycles at 0.5 A g–1.This study provides an essential theoretical basis for the effective exfoliation of layered graphite-based materials and their applications in energy storage.展开更多
This study explores whether manager mobility can influence syndications between private equity(PE)firms by constructing coupling network models.Using data from China’s private equity market from 1993 to 2017,we found...This study explores whether manager mobility can influence syndications between private equity(PE)firms by constructing coupling network models.Using data from China’s private equity market from 1993 to 2017,we found that driving forces,resistant forces,and network structure play significant roles in determining resource flows between PE firms.Specifically,driving forces indicate that managers moving from domestic and foreign PE firms to state-owned PE firms are more likely to induce syndications.Furthermore,if the manager is promoted when changing jobs,mobility is likely to enhance the flow of resources.Resistant forces indicate that increased geographical distance reduces syndications.As for the influence of structure,if managers leave PE firms with higher status,they are more likely to induce syndications.This study contributes to the coupling network literature by providing a clarified three-factor framework.By exploring the characteristic of managers in state-owned private equity firms,we specified the syndication theory in China.This study can help private equity firms hire valuable managers and expand syndication networks in practice.展开更多
Light is arguably one of the most important environmental factors that determines virtually all aspects of plant growth and development,but the molecular link between light signaling and the autophagy pathway has not ...Light is arguably one of the most important environmental factors that determines virtually all aspects of plant growth and development,but the molecular link between light signaling and the autophagy pathway has not been elucidated in plants.In this study,we demonstrate that autophagy is activated during light-to-dark conversion though transcriptional upregulation of autophagy-related genes(ATGs).We showed that depletion of the ELONGATED HYPOCOTYL 5(HY5),a key component of light signaling,leads to enhanced autophagy activity and resistance to extended darkness and nitrogen starvation treatments,contributing to higher expression oiATGs.HY5 interacts with and recruits HISTONE DEACETYLASE 9(HDA9)to ATG5 and ATG8e loci to repress their expression by deacetylation of the Lys9 and Lys27 of histone 3.Furthermore,we found that both darkness and nitrogen depletion induce the degradation of HY5 via 26S proteasome and the concomitant disassociation of HDA9 from ATG5 and ATG8e loci,leading to their depression and thereby activated autophagy.Genetic analysis further confirmed that HY5 and HDA9 act synergistically and function upstream of the autophagy pathway.Collectively,our study unveils a previously unknown transcriptional and epigenetic network that regulates autophagy in response to light-to-dark conversion and nitrogen starvation in plants.展开更多
(Molecular Plant 13,515-531;March 2020)After publication of our original manuscript,we became aware of errors in Figure 4.During the preparation of Figure 4C in this article as originally published,we inadvertently du...(Molecular Plant 13,515-531;March 2020)After publication of our original manuscript,we became aware of errors in Figure 4.During the preparation of Figure 4C in this article as originally published,we inadvertently duplicated the image of hda9-1(MS-N)as that of the hda9-1-C(MS+N).Also,in Figure 4H,the image of pUBQ10:GFP-ATG8a/hda9-1(MS+L)was mistakenly a duplicate of pUBQ10:GFP-ATG8a/WT(MS+L)shown in Figure S7C.A corrected version of Figure 4 is shown below.The scientific conclusions of this article have not been affected by this correction.The authors apologize for not detecting this error prior to publication and for any inconvenience that may have been caused.展开更多
N-containing Ce_(2)Si_(2.5)Al_(0.5)O_(3.5)N_(3.5)(CeSiAlON) melilite was synthesized at 1550 and 1600℃ for 5 h from CeO_(2),Si,Al,and Al_(2)O_(3) in nitrogen by using Y_(2)O_(3) and transition-metal nitrates(Co(NO_(3...N-containing Ce_(2)Si_(2.5)Al_(0.5)O_(3.5)N_(3.5)(CeSiAlON) melilite was synthesized at 1550 and 1600℃ for 5 h from CeO_(2),Si,Al,and Al_(2)O_(3) in nitrogen by using Y_(2)O_(3) and transition-metal nitrates(Co(NO_(3))_(2)·6 H_(2) O and Ni(NO_(3))_(2)·6 H_(2)O) as additives.The effects of Y_(2)O_(3) and transition-metal nitrates on the phase,microstructures and photoluminescence properties of CeSiAlON melilite were studied.The incorporation of Y_(2)O_(3) can promote the reaction of raw materials to a low degree,and results in a unit cell shrinkage of CeSiAlON due to the smaller radius of Y atom than that of Ce atom.The transition-metal nitrates can accelerate the reaction clearly and facilitate the formation of CeSiAlON fibers.The photoluminescence(PL) properties of CeSiAlON melilite presents a board violet emission band because of the 5 d-4 f transitions of Ce^(3+),and the additives can enhance the PL emission intensities of specimen significantly.展开更多
The molten salt method focuses on improving the crystallinity of synthetic materials and avoiding the high energy consumption of traditional synthesis processes.In this work,a novel BiOBr/Bi_(2)S_(3)high-low junction ...The molten salt method focuses on improving the crystallinity of synthetic materials and avoiding the high energy consumption of traditional synthesis processes.In this work,a novel BiOBr/Bi_(2)S_(3)high-low junction with large contact area was constructed by the molten salt method combined with the ion exchange strategy.Its unique energy band structure and new charge transfer mechanism realize the rapid migration of photogenerated charges between different components.Specifically,Bi_(2)S_(3)was grown on BiOBr in situ by a high-temperature molten salt reaction.Due to the deep valence band position of BiOBr and the narrow band gap of Bi_(2)S_(3),an intrinsic internal electric field and band bending are produced at the interface,forming a high-low junction photocatalyst with an intimate interface.In addition,the BiOBr/Bi_(2)S_(3)composite maintains a high oxidation potential and produces high and robust photocatalytic oxidation activity.In the molten state,the close binding of BiOBr and Bi_(2)S_(3)can be promoted through the ion-exchange strategy,resulting in excellent photocatalytic degradation rates of bisphenol A and tetracycline and in-situ generation of H_(2)O_(2).Finally,the mechanism of carriers separation and transfer in BiOBr/Bi_(2)S_(3)high-low junction is also discussed.Density functional theory(DFT)results found that the improvement of O_(2)adsorption ability would promote the occurrence of oxygen reduction reaction(ORR),and make positive contributions to the enhanced H_(2)O_(2)production activity.This study will provide a new perspective for broadening the spectral response range of Bi-based photocatalytic materials and preparing high-low junction photocatalysts with dense interface by the molten salt method.展开更多
Realizing efficient charge separation and directional transfer is a challenge for single-component semiconductors.The spatial electric field generated by dipole moment could promote charge separation.Here,three-dimens...Realizing efficient charge separation and directional transfer is a challenge for single-component semiconductors.The spatial electric field generated by dipole moment could promote charge separation.Here,three-dimensional hierarchical Cu Co_(2)S_(4)microspheres with lattice distortion were prepared,and lattice distortion was modulated by changing feed Co/Cu molar ratios in synthesis.Cu Co_(2)S_(4)showed asymmetric crystal structure,leading to generation of dipole moment.The charge separation efficiency of Cu Co_(2)S_(4)was related to lattice distortion,and lattice expansion was in favor for charge separation.The Cu Co_(2)S_(4)with feed Cu/Co molar ratio of 1:4 (CCS-4) showed the maximum lattice expansion and exhibited the highest photocatalytic activity,which was attributable to the highest charge separation efficiency and the largest specific surface area.CCS-4 can remove 95.4%of tetracycline hydrochloride within 40 min photocatalysis,and effectively improve the biodegradability of pharmaceutical wastewater.Importantly,this study provides a new vision for constructing single-component photocatalysts with high photocatalytic performance.展开更多
The bZIP transcription factor ABSCISIC ACID INSENSITIVE5(ABI5)is a master regulator of seed germination and post-germinative growth in response to abscisic acid(ABA),but the detailed molecularmechanism by which it rep...The bZIP transcription factor ABSCISIC ACID INSENSITIVE5(ABI5)is a master regulator of seed germination and post-germinative growth in response to abscisic acid(ABA),but the detailed molecularmechanism by which it represses plant growth remains unclear.In this study,we used proximity labeling to map the neighboring proteome of ABI5 and identified FCS-LIKE ZINC FINGER PROTEIN 13(FLZ13)as a novel ABI5 interaction partner.Phenotypic analysis of flz13 mutants and FLZ13-overexpressing lines demonstrated that FLZ13 acts as a positive regulator of ABA signaling.Transcriptomic analysis revealed that both FLZ13 and ABI5 downregulate the expression of ABA-repressed and growth-related genes involved in chlorophyll biosynthesis,photosynthesis,and cell wall organization,thereby repressing seed germination and seedling establishment in response to ABA.Further genetic analysis showed that FLZ13 and ABI5 function together to regulate seed germination.Collectively,our findings reveal a previously uncharacterized transcriptional regulatorymechanismby which ABA mediates inhibition of seed germination and seedling establishment.展开更多
Constructing heterojunction between two semiconductors with matched energy band structure is an effective modification method to obtain excellent photocatalysts.The experimental scheme adopts a simple solvent method t...Constructing heterojunction between two semiconductors with matched energy band structure is an effective modification method to obtain excellent photocatalysts.The experimental scheme adopts a simple solvent method to self-assemble nitrogen doped carbon dots(N-CDs)on the surface of sulfur doped carbon nitride(S-C_(3)N_(4))semiconductor throughπ-πconjugate interaction.Based on this,a novel 0D/2D S-scheme heterojunction N-CDs/S-C_(3)N_(4)hybrid was successfully prepared.The degradation kinetic constants of N-CDs/S-C_(3)N_(4)for rhodamine B(RhB)and p-nitrophenol(PNP)reached 0.23522 and 0.01342 min^(−1),repectively,which were 2.72 and 2.65 times that of S-C_(3)N_(4).The highest photocatalytic hydrogen evolution rate was observed under the simulated sunlight irradiation,which was 2.30 times that of S-C_(3)N_(4).The improvement of photocatalytic performance was mainly based on the formation of the S-scheme heterojunction between S-C_(3)N_(4)and N-CDs.The effects of internal electric field,π-πconjugate interaction and band bending promoted the photogenerated h^(+)and e^(−) with low redox ability to recombine and retained the beneficial h+and e−with strong redox ability,which contributed to the production of more active species of h^(+) and•O_(2)−,therefore the photocatalytic degradation and hydrogen evolution performance were significantly enhanced.展开更多
By adjusting the type and proportion of doping elements in the g-C_(3)N_(4)-based photocatalyst,the internal electric field(IEF)strength of the semiconductor can be regulated.This can effectively enhance the driving f...By adjusting the type and proportion of doping elements in the g-C_(3)N_(4)-based photocatalyst,the internal electric field(IEF)strength of the semiconductor can be regulated.This can effectively enhance the driving force of charge separation in the photocatalytic process.It is found that the introduction of appropriate concentration of Bi and S into the skeleton structure of g-C_(3)N_(4)can achieve efficient degradation of tetracycline(TC)and other pollutants in the liquid environment and excellent photocatalytic H_(2)evolution performance(1139μmol·L^(-1)·h^(-1)).Since the prepared samples have similar crystal structures,the relative strength of IEF can be calculated.It can be used as the basis for adjusting the IEF strength of g-C_(3)N_(4)-based semiconductor by element doping.In addition,the Bi and S co-doped g-C_(3)N_(4)samples after solvothermal reflux show good chemical stability and can reduce the nanostructure defects caused by co-doping of heteroatoms,thus it provides a novel solution for the construction of g-C_(3)N_(4)-based dual-function photocatalyst with high activity and stability.展开更多
The matched energy band structure and efficient carrier separation efficiency are the keys to heterogeneous photocatalytic reactions.A novel organic/inorganic step scheme(S-scheme)heterojunction PDI-Urea/BiOBr composi...The matched energy band structure and efficient carrier separation efficiency are the keys to heterogeneous photocatalytic reactions.A novel organic/inorganic step scheme(S-scheme)heterojunction PDI-Urea/BiOBr composite photocatalyst was constructed by simple solvothermal reaction combined with in-situ growth strategy.The composite photocatalyst not only has high chemical stability,but also can generate and accumulate a large number of active species(h^(+),·O_(2)^(-),·OH,H_(2)O_(2)).PDI-Urea/BiOBr showed higher photocatalytic activity for the degradation of antibiotic such as ofloxacin(OFLO),tetracycline(TC)and the production of H_(2)O_(2) in the spectral range of 400-800 nm.The apparent rate constant of 15%PDI-Urea/BiOBr for photocatalytic degradation of TC(or OFLO)was 2.7(or 2.5)times that of pure BiOBr and 1.7(or 1.8)times that of pure PDI-Urea.The H_(2)O_(2) evolution rate of 15%PDI-Urea/BiOBr was 2.5 times that of PDI-Urea and 1.5 times that of BiOBr,respectively.This work has formed a mature S-scheme heterojunction design thought and method,which offers new visions for the development of heterogeneous photocatalysts.展开更多
Fabricating surface oxygen vacancies is considered to be an efficient method to improve the adsorption performance of sorbents.In this work,a bismuth oxychloride/biochar(BiOCl/BC)nanocomposite with abundant oxygen vac...Fabricating surface oxygen vacancies is considered to be an efficient method to improve the adsorption performance of sorbents.In this work,a bismuth oxychloride/biochar(BiOCl/BC)nanocomposite with abundant oxygen vacancies was successfully prepared by a facile ball milling method.BiOCl/BC nanocomposite was found to have excellent adsorption performance for removing reactive red-120(RR120)from aqueous solution.The effects of key adsorption parameters,such as RR120 dye concentration,solution pH(2-10),and contact time were studied by batch adsorption test.The adsorption data were well described by the Langmuir and Freundlich isotherms and pseudo-second-order kinetic models.The 50%-BiOCl/BC(50 wt%of BiOCl in composite)exhibited the best adsorptive performance(60%),much better than the pristine BM-BC(20%).The high adsorption capacity of 50%-BiOCl/BC(Langmuir maximum capacity of 116.382 mg g^(−1))can be attributed to the electrostatic effect,π-πinteractions,and hydrogen bond.This work provided a facile method to prepare semiconductor assisted biochar-based adsorbents,which would also contribute to the advance of environmental remediation.展开更多
文摘The production of renewable fuels through water splitting via photocatalytic hydrogen production holds significant promise.Nonetheless,the sluggish kinetics of hydrogen evolution and the inadequate water adsorption on photocatalysts present notable challenges.In this study,we have devised a straightforward hydrothermal method to synthesize Bi_(2)O_(3)(BO)derived from metal‐organic frameworks(MOFs),loaded with flower-like ZnIn_(2)S_(4)(ZIS).This approach substantially enhances water adsorption and surface catalytic reactions,resulting in a remarkable enhancement of photocatalytic activity.By employing triethanolamine(TEOA)as a sacrificial agent,the hydrogen evolution rate achieved with 15%(mass fraction)ZIS loading on BO reached an impressive value of 1610μmol∙h^(−1)∙g^(−1),marking a 6.34-fold increase compared to that observed for bare BO.Furthermore,through density functional theory(DFT)and ab initio molecular dynamics(AIMD)calculations,we have identified the reactions occurring at the ZIS/BO S-scheme heterojunction interface,including the identification of active sites for water adsorption and catalytic reactions.This study provides valuable insights into the development of high-performance composite photocatalytic materials with tailored electronic properties and wettability.
基金supported by the National Natural Science Foundation of China(51772140)the Natural Science Foundation of Jiangxi Province,China(20161BAB206111,20171ACB21033)the Scientific Research Foundation of Jiangxi Provincial Education Department,China(GJJ170578)~~
文摘To increase the number of active sites and defects in TiO2 and promote rapid and efficient transfer of photogenerated charges, a g-C3N4@C-TiO2 composite photocatalyst was prepared via in situ deposition of g-C3N4 on a carbon-doped anatase TiO2 surface. The effects of carbon doping state and surface modification of g-C3N4 on the performance of g-C3N4@C-TiO2 composite photocatalysts were studied by X-ray diffraction, X-ray photoelectron spectroscopy, UV-visible diffuse-reflectance spectroscopy, transmission electron microscopy, electrochemical impedance spectroscopy, photoluminescence, and electron paramagnetic resonance. With increasing carbon doping content, the carbon doping state in TiO2 gradually changed from gap to substitution doping. Although the number of oxygen vacancies gradually increased, the degradation efficiency of g-C3N4@C-TiO2 for RhB (phenol) initially increased and subsequently decreased with increasing carbon content. The g-C3N4@10C-TiO2 sample exhibited the highest apparent reaction rate constant of 0.036 min儃1 (0.039 min儃1) for RhB (phenol) degradation, which was 150 (139), 6.4 (6.8), 2.3 (3), and 1.7 (2.1) times higher than that of pure TiO2, 10C-TiO2, g-C3N4, and g-C3N4@TiO2, respectively. g-C3N4 was grown in situ on the surface of C-TiO2 by surface carbon hybridization and bonding. The resultant novel g-C3N4@C-TiO2 photocatalyst exhibited direct Z-scheme heterojunctions with non-local impurity levels. The high photocatalytic activity can be attributed to the synergistic effects of the improved visible light response ability, higher photogenerated electron transfer efficiency, and redox ability arising from Z-type heterojunctions.
基金supported by the National Natural Science Foundation of China(Grant Nos.52272063 and 22262024)Key Research and Development Program of Jiangxi Province(Grant No.20203BBE53066)+1 种基金Natural Science Foundation of Jiangxi Province(Grant No.20224BAB214037)Graduate Innovation Special Fund of Nanchang Hangkong University(Grant No.YC_(2)023-S683).
文摘Two-dimensional(2D)nanomaterials,such as graphene,MoS_(2),and MAX,have attracted increasing research attention in recent years due to their unique structural and performance advantages.However,their complex production processes and equipment requirements are significant issues affecting their widespread use.Here,with an exfoliation strategy using three-roll milling,we present a simple,cost-effective,and extensible method to produce multilayer graphene,BN,MoS_(2),and Ti_(3)AlC_(2) nanosheets.The roller and phenolic resin created three kinds of forces on the layered 2D materials,i.e.,shear forces,compressive forces,and adhesive forces,which exfoliated layered materials from their edges and surfaces into nanosheets.Subsequently,the exfoliated materials were ultrasonically washed with alcohol,treated with ultrasonic vibration,and centrifuged to obtain 2D nanomaterials.The easy operation and high yield are attractive for research based on the construction of high-performance 2D nanosheet-based devices at low cost.Herein,the obtained multilayer graphene and MoS_(2) nanosheets were used as anode materials of sodium/potassium-ion batteries,respectively,to test their electrochemical properties.Better performances are obtained compared with their primary bulk materials.
基金grants from the National Natural Science Foundation of China(32061160467,32270291,31870171)Open Competition Program of Top Ten Critical Priorities of Agricultural Science and Technology Innovation for the 14th Five-Year Plan of Guangdong Province(2022SDZG05)to C.G+6 种基金the Youth Innovation Promotion Association,Chinese Academy of Sciences(2023364)the Guangdong Basic and Applied Basic Research Foundation(2022A1515012319)the Guangzhou Basic and Applied Basic Research Foundation(2023A04J0094)to C.Y.the National Natural Science Foundation of China(32222087)the Research Grants Council of Hong Kong(N_CUHK405/20,24108820,and 14106622)The Chinese University of Hong Kong(CUHK)Research Committee to X.Z.the US National Science Foundation(#MCB-2040582)to D.C.B.
文摘SnRK1,an evolutionarily conserved heterotrimeric kinase complex that acts as a key metabolic sensor in maintaining energy homeostasis in plants,is an important upstream activator of autophagy that serves as a cellular degradation mechanism for the healthy growth of plants.However,whether and how the autophagy pathway is involved in regulating SnRK1 activity remains unknown.In this study,we identified a clade of plant-specific and mitochondria-localized Fcs-like zinc finger(FLZ)proteins as currently unknown ATG8-interacting partners that actively inhibit SnRK1 signaling by repressing the T-loop phosphorylation of the catalyticαsubunits of SnRK1,thereby negatively modulating autophagy and plant tolerance to energy deprivation caused by long-term carbon starvation.Interestingly,these AtFLZs are transcriptionally repressed by low-energy stress,and AtFLZ proteins undergo a selective autophagy-dependent pathway to be delivered to the vacuole for degradation,thereby constituting a positive feedback regulation to relieve their repression of SnRK1 signaling.Bioinformatic analyses show that the ATG8-FLZ-SnRK1 regulatory axis first appears in gymnosperms and seems to be highly conserved during the evolution of seed plants.Consistent with this,depletion of ATG8-interacting ZmFLZ14 confers enhanced tolerance,whereas overexpression of ZmFLZ14 leads to reduced tolerance to energy deprivation in maize.Collectively,our study reveals a previously unknown mechanism by which autophagy contributes to the positive feedback regulation of SnRK1 signaling,thereby enabling plants to better adapt to stressful environments.
基金supported by the Natural Science Foundation of China(Nos.51862024 and 51962023)the Key Research and Development Program of Jiangxi Province(No.20203BBE53066).
文摘Due to its larger ionic radius,further studies are needed before graphite can be used as an anode for sodium/potassium-ion batteries(SIBs/KIBs).It is believed that doping and increasing the layer spacing can improve the Na+/K+storage.Herein,S/N co-doped graphite nanosheets(GNS)with an enlarged interlayer spacing of 0.39 nm were prepared via exfoliation with three-roll milling(TRM)combined with thiourea heated at different temperatures.This method generates abundant defects and active sites for GNS,as well as facilitates rapid access and transport of electrolytes and electrons/ions.The electrochemical results show that the S/N-doped GNS exfoliated 15 times and heated at 600°C(SNGNS15-600)with thiourea as the electrode delivers a discharge capacity of 94 mAh g–1 over 6000 cycles at 10 A g–1 with an enhanced rate capability and stable performance for application in SIBs.Calculations using density functional theory show that the increased interlayer spacing by TRM and S,N co-doping enhances the adsorption energies of Na+on graphite,thus improving the Na+storage.As the anode for KIBs,the SNGNS15-600 electrode has a capacity of 142 mAh g–1 after 5000 cycles at 0.5 A g–1.This study provides an essential theoretical basis for the effective exfoliation of layered graphite-based materials and their applications in energy storage.
基金supported by the Fundamental Research Funds for the Central Universities(No.FRF-TP-22-063A1)the General Program of the National Natural Science Foundation of China(No.71874099).
文摘This study explores whether manager mobility can influence syndications between private equity(PE)firms by constructing coupling network models.Using data from China’s private equity market from 1993 to 2017,we found that driving forces,resistant forces,and network structure play significant roles in determining resource flows between PE firms.Specifically,driving forces indicate that managers moving from domestic and foreign PE firms to state-owned PE firms are more likely to induce syndications.Furthermore,if the manager is promoted when changing jobs,mobility is likely to enhance the flow of resources.Resistant forces indicate that increased geographical distance reduces syndications.As for the influence of structure,if managers leave PE firms with higher status,they are more likely to induce syndications.This study contributes to the coupling network literature by providing a clarified three-factor framework.By exploring the characteristic of managers in state-owned private equity firms,we specified the syndication theory in China.This study can help private equity firms hire valuable managers and expand syndication networks in practice.
基金supported by grants from the National Natural Science Foundation of China(31900231)National Science Foundation of Guangdong Province(2018A030310505)to C.Y.+3 种基金the National Natural Science Foundation of China(31870171 and 31671467),toC.G.the Youth Innovation Promotion Association,Chinese Academy of Sciences(2017399)the National Key R&D Program of China(2019YFC1711102)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA13020500)to M.L.,and the National Natural Science Foundation of China(31701246)to W.S.
文摘Light is arguably one of the most important environmental factors that determines virtually all aspects of plant growth and development,but the molecular link between light signaling and the autophagy pathway has not been elucidated in plants.In this study,we demonstrate that autophagy is activated during light-to-dark conversion though transcriptional upregulation of autophagy-related genes(ATGs).We showed that depletion of the ELONGATED HYPOCOTYL 5(HY5),a key component of light signaling,leads to enhanced autophagy activity and resistance to extended darkness and nitrogen starvation treatments,contributing to higher expression oiATGs.HY5 interacts with and recruits HISTONE DEACETYLASE 9(HDA9)to ATG5 and ATG8e loci to repress their expression by deacetylation of the Lys9 and Lys27 of histone 3.Furthermore,we found that both darkness and nitrogen depletion induce the degradation of HY5 via 26S proteasome and the concomitant disassociation of HDA9 from ATG5 and ATG8e loci,leading to their depression and thereby activated autophagy.Genetic analysis further confirmed that HY5 and HDA9 act synergistically and function upstream of the autophagy pathway.Collectively,our study unveils a previously unknown transcriptional and epigenetic network that regulates autophagy in response to light-to-dark conversion and nitrogen starvation in plants.
文摘(Molecular Plant 13,515-531;March 2020)After publication of our original manuscript,we became aware of errors in Figure 4.During the preparation of Figure 4C in this article as originally published,we inadvertently duplicated the image of hda9-1(MS-N)as that of the hda9-1-C(MS+N).Also,in Figure 4H,the image of pUBQ10:GFP-ATG8a/hda9-1(MS+L)was mistakenly a duplicate of pUBQ10:GFP-ATG8a/WT(MS+L)shown in Figure S7C.A corrected version of Figure 4 is shown below.The scientific conclusions of this article have not been affected by this correction.The authors apologize for not detecting this error prior to publication and for any inconvenience that may have been caused.
基金supported by the National Natural Science Foundation of China (51862024,51772140,51962023)the Natural Science Foundation of Jiangxi Province (20171ACB21033,20192ACBL21047)。
文摘N-containing Ce_(2)Si_(2.5)Al_(0.5)O_(3.5)N_(3.5)(CeSiAlON) melilite was synthesized at 1550 and 1600℃ for 5 h from CeO_(2),Si,Al,and Al_(2)O_(3) in nitrogen by using Y_(2)O_(3) and transition-metal nitrates(Co(NO_(3))_(2)·6 H_(2) O and Ni(NO_(3))_(2)·6 H_(2)O) as additives.The effects of Y_(2)O_(3) and transition-metal nitrates on the phase,microstructures and photoluminescence properties of CeSiAlON melilite were studied.The incorporation of Y_(2)O_(3) can promote the reaction of raw materials to a low degree,and results in a unit cell shrinkage of CeSiAlON due to the smaller radius of Y atom than that of Ce atom.The transition-metal nitrates can accelerate the reaction clearly and facilitate the formation of CeSiAlON fibers.The photoluminescence(PL) properties of CeSiAlON melilite presents a board violet emission band because of the 5 d-4 f transitions of Ce^(3+),and the additives can enhance the PL emission intensities of specimen significantly.
基金financially supported by the National Natural Science Foundation of China(Nos.22262024,51962023,52272063 and 51978324)the Zhejiang Province Key Research and Development Project(2023 C01191)the Double Thousand Talent Plan of Jiangxi Province,the Jiangxi Academic and Technical Leader of Major Disciplines(No.20213BCJL22053).
文摘The molten salt method focuses on improving the crystallinity of synthetic materials and avoiding the high energy consumption of traditional synthesis processes.In this work,a novel BiOBr/Bi_(2)S_(3)high-low junction with large contact area was constructed by the molten salt method combined with the ion exchange strategy.Its unique energy band structure and new charge transfer mechanism realize the rapid migration of photogenerated charges between different components.Specifically,Bi_(2)S_(3)was grown on BiOBr in situ by a high-temperature molten salt reaction.Due to the deep valence band position of BiOBr and the narrow band gap of Bi_(2)S_(3),an intrinsic internal electric field and band bending are produced at the interface,forming a high-low junction photocatalyst with an intimate interface.In addition,the BiOBr/Bi_(2)S_(3)composite maintains a high oxidation potential and produces high and robust photocatalytic oxidation activity.In the molten state,the close binding of BiOBr and Bi_(2)S_(3)can be promoted through the ion-exchange strategy,resulting in excellent photocatalytic degradation rates of bisphenol A and tetracycline and in-situ generation of H_(2)O_(2).Finally,the mechanism of carriers separation and transfer in BiOBr/Bi_(2)S_(3)high-low junction is also discussed.Density functional theory(DFT)results found that the improvement of O_(2)adsorption ability would promote the occurrence of oxygen reduction reaction(ORR),and make positive contributions to the enhanced H_(2)O_(2)production activity.This study will provide a new perspective for broadening the spectral response range of Bi-based photocatalytic materials and preparing high-low junction photocatalysts with dense interface by the molten salt method.
基金financially supported by the National Natural Science Foundation of China (Nos. 51978324, 51720105001, 51938007)Natural Science Foundation of Jiangxi Province (Nos. 20213BCJL22053, 20192ACBL20043, 20192ACBL21047)+1 种基金Natural Science Foundation of Jiangxi Province, China (No. 20212BAB204045)Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle (Nanchang Hangkong University) (No. ES202002077)。
文摘Realizing efficient charge separation and directional transfer is a challenge for single-component semiconductors.The spatial electric field generated by dipole moment could promote charge separation.Here,three-dimensional hierarchical Cu Co_(2)S_(4)microspheres with lattice distortion were prepared,and lattice distortion was modulated by changing feed Co/Cu molar ratios in synthesis.Cu Co_(2)S_(4)showed asymmetric crystal structure,leading to generation of dipole moment.The charge separation efficiency of Cu Co_(2)S_(4)was related to lattice distortion,and lattice expansion was in favor for charge separation.The Cu Co_(2)S_(4)with feed Cu/Co molar ratio of 1:4 (CCS-4) showed the maximum lattice expansion and exhibited the highest photocatalytic activity,which was attributable to the highest charge separation efficiency and the largest specific surface area.CCS-4 can remove 95.4%of tetracycline hydrochloride within 40 min photocatalysis,and effectively improve the biodegradability of pharmaceutical wastewater.Importantly,this study provides a new vision for constructing single-component photocatalysts with high photocatalytic performance.
基金supported by grants from the Open Competition Program of Top Ten Critical Priorities of Agricultural Science and Technology Innovation for the 14th Five-Year Plan of Guangdong Province(2022SDZG05)the National Natural Science Foundation of China(32270291,32061160467,31870171)to C.G.+7 种基金the Youth Innovation Promotion Association,Chinese Academy of Sciences(2023364)the Guangdong Basic and Applied Basic Research Foundation(2022A1515012319)the Guangzhou Basic and Applied Basic Research Foundation(2023A04J0094)to C.Y.the Sub-Project of Chinese Academy of Sciences Pilot Project(XDA24030502)the Guangdong Provincial Special Fund for Modern Agriculture Industry Technology InnovationTeams(2020KJ148)to Y.W.the National Natural Science Foundation of China(32170362),the Guangdong Natural Science Funds for Distinguished Young Scholars(2022B1515020026)the Youth Innovation Promotion Association,Chinese Academy of Sciences(Y2021094)the Fund of South China Botanical Garden,Chinese Academy of Sciences(QNXM-02)to M.L.
文摘The bZIP transcription factor ABSCISIC ACID INSENSITIVE5(ABI5)is a master regulator of seed germination and post-germinative growth in response to abscisic acid(ABA),but the detailed molecularmechanism by which it represses plant growth remains unclear.In this study,we used proximity labeling to map the neighboring proteome of ABI5 and identified FCS-LIKE ZINC FINGER PROTEIN 13(FLZ13)as a novel ABI5 interaction partner.Phenotypic analysis of flz13 mutants and FLZ13-overexpressing lines demonstrated that FLZ13 acts as a positive regulator of ABA signaling.Transcriptomic analysis revealed that both FLZ13 and ABI5 downregulate the expression of ABA-repressed and growth-related genes involved in chlorophyll biosynthesis,photosynthesis,and cell wall organization,thereby repressing seed germination and seedling establishment in response to ABA.Further genetic analysis showed that FLZ13 and ABI5 function together to regulate seed germination.Collectively,our findings reveal a previously uncharacterized transcriptional regulatorymechanismby which ABA mediates inhibition of seed germination and seedling establishment.
基金support from the National Natural Science Foundation of China (Nos. 51962023, 51772139)the Natural Science Foundation of Jiangxi Province, China (No. 20192ACBL21047, 20212BAB204045)+1 种基金the Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle (Nanchang Hangkong University) (No. ES202002077)the 2019 Project of Liaoning Education Department (No. 2019LNJC20)
文摘Constructing heterojunction between two semiconductors with matched energy band structure is an effective modification method to obtain excellent photocatalysts.The experimental scheme adopts a simple solvent method to self-assemble nitrogen doped carbon dots(N-CDs)on the surface of sulfur doped carbon nitride(S-C_(3)N_(4))semiconductor throughπ-πconjugate interaction.Based on this,a novel 0D/2D S-scheme heterojunction N-CDs/S-C_(3)N_(4)hybrid was successfully prepared.The degradation kinetic constants of N-CDs/S-C_(3)N_(4)for rhodamine B(RhB)and p-nitrophenol(PNP)reached 0.23522 and 0.01342 min^(−1),repectively,which were 2.72 and 2.65 times that of S-C_(3)N_(4).The highest photocatalytic hydrogen evolution rate was observed under the simulated sunlight irradiation,which was 2.30 times that of S-C_(3)N_(4).The improvement of photocatalytic performance was mainly based on the formation of the S-scheme heterojunction between S-C_(3)N_(4)and N-CDs.The effects of internal electric field,π-πconjugate interaction and band bending promoted the photogenerated h^(+)and e^(−) with low redox ability to recombine and retained the beneficial h+and e−with strong redox ability,which contributed to the production of more active species of h^(+) and•O_(2)−,therefore the photocatalytic degradation and hydrogen evolution performance were significantly enhanced.
基金the financial support from the National Natural Science Foundation of China(No.51962023,51862024)the Natural Science Foundation of Jiangxi Province,China(No.20212BAB204045,20192ACBL21047)the Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle(Nanchang Hangkong University)(No.ES202002077)。
文摘By adjusting the type and proportion of doping elements in the g-C_(3)N_(4)-based photocatalyst,the internal electric field(IEF)strength of the semiconductor can be regulated.This can effectively enhance the driving force of charge separation in the photocatalytic process.It is found that the introduction of appropriate concentration of Bi and S into the skeleton structure of g-C_(3)N_(4)can achieve efficient degradation of tetracycline(TC)and other pollutants in the liquid environment and excellent photocatalytic H_(2)evolution performance(1139μmol·L^(-1)·h^(-1)).Since the prepared samples have similar crystal structures,the relative strength of IEF can be calculated.It can be used as the basis for adjusting the IEF strength of g-C_(3)N_(4)-based semiconductor by element doping.In addition,the Bi and S co-doped g-C_(3)N_(4)samples after solvothermal reflux show good chemical stability and can reduce the nanostructure defects caused by co-doping of heteroatoms,thus it provides a novel solution for the construction of g-C_(3)N_(4)-based dual-function photocatalyst with high activity and stability.
基金support from the National Natural Science Foundation of China(Nos.51962023,51862024)the Natural Science Foundation of Jiangxi Province,China(Nos.20212BAB204045,20192ACBL21047)the Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle(Nanchang Hangkong University)(No.ES202002077).
文摘The matched energy band structure and efficient carrier separation efficiency are the keys to heterogeneous photocatalytic reactions.A novel organic/inorganic step scheme(S-scheme)heterojunction PDI-Urea/BiOBr composite photocatalyst was constructed by simple solvothermal reaction combined with in-situ growth strategy.The composite photocatalyst not only has high chemical stability,but also can generate and accumulate a large number of active species(h^(+),·O_(2)^(-),·OH,H_(2)O_(2)).PDI-Urea/BiOBr showed higher photocatalytic activity for the degradation of antibiotic such as ofloxacin(OFLO),tetracycline(TC)and the production of H_(2)O_(2) in the spectral range of 400-800 nm.The apparent rate constant of 15%PDI-Urea/BiOBr for photocatalytic degradation of TC(or OFLO)was 2.7(or 2.5)times that of pure BiOBr and 1.7(or 1.8)times that of pure PDI-Urea.The H_(2)O_(2) evolution rate of 15%PDI-Urea/BiOBr was 2.5 times that of PDI-Urea and 1.5 times that of BiOBr,respectively.This work has formed a mature S-scheme heterojunction design thought and method,which offers new visions for the development of heterogeneous photocatalysts.
基金the National Natural Science Foundation of China(11864024)Jiangxi Provincial Natural Science Foundation(20202BABL214025,20202BABL214010,20212BAB214034).
文摘Fabricating surface oxygen vacancies is considered to be an efficient method to improve the adsorption performance of sorbents.In this work,a bismuth oxychloride/biochar(BiOCl/BC)nanocomposite with abundant oxygen vacancies was successfully prepared by a facile ball milling method.BiOCl/BC nanocomposite was found to have excellent adsorption performance for removing reactive red-120(RR120)from aqueous solution.The effects of key adsorption parameters,such as RR120 dye concentration,solution pH(2-10),and contact time were studied by batch adsorption test.The adsorption data were well described by the Langmuir and Freundlich isotherms and pseudo-second-order kinetic models.The 50%-BiOCl/BC(50 wt%of BiOCl in composite)exhibited the best adsorptive performance(60%),much better than the pristine BM-BC(20%).The high adsorption capacity of 50%-BiOCl/BC(Langmuir maximum capacity of 116.382 mg g^(−1))can be attributed to the electrostatic effect,π-πinteractions,and hydrogen bond.This work provided a facile method to prepare semiconductor assisted biochar-based adsorbents,which would also contribute to the advance of environmental remediation.
