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Boosting Peroxymonosulfate Activation via Co-Based LDH-Derived Magnetic Catalysts:A Dynamic and Static State Assessment of Efficient Radical-Assisted Electron Transfer Processes
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作者 Wenhan Yang Junming Xia +8 位作者 Fanfan Shang Ge Ge Yang Bin Wang Hairui Cai Lingyun Jing Hao Zhu Shengchun Yang Chao Liang Guosheng Shao 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第5期301-312,共12页
Heterogeneous catalysts promoting efficient production of reactive species and dynamically stabilized electron transfer mechanisms for peroxomonosulfates(PMS)still lack systematic investigation.Herein,a more stable ma... Heterogeneous catalysts promoting efficient production of reactive species and dynamically stabilized electron transfer mechanisms for peroxomonosulfates(PMS)still lack systematic investigation.Herein,a more stable magnetic layered double oxides(CFLDO/N-C),was designed using self-polymerization and high temperature carbonization of dopamine.The CFLDO/N-C/PMS system effectively activated PMS to remove 99%(k=0.737 min^(-1))of tetracycline(TC)within 10 min.The CFLDO/N-C/PMS system exhibited favorable resistance to inorganic anions and natural organics,as well as satisfactory suitability for multiple pollutants.The magnetic properties of the catalyst facilitated the separation of catalysts from the liquid phase,resulting in excellent reproducibility and effectively reducing the leaching of metal ions.An electronic bridge was constructed between cobalt(the active platform of the catalyst)and PMS,inducing PMS to break the O-O bond to generate the active species.The combination of static analysis and dynamic evolution confirmed the effective adsorption of PMS on the catalyst surface as well as the strong radical-assisted electron transfer process.Eventually,we further identified the sites where the reactive species attacked the TC and evaluated the toxicity of the intermediates.These findings offer innovative insights into the rapid degradation of pollutants achieved by transition metals in SR-AOPs and its mechanistic elaboration. 展开更多
关键词 advanced oxidation process degradation mechanisms electron transport layered double hydroxide reactive species
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Smart responsive staple for dynamic promotion of anastomotic stoma healing
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作者 Qi Sun Zifeng Yang +4 位作者 Ruijun Xu Renjie Li Yang Li Feng Wang Yong Li 《Bioactive Materials》 SCIE CSCD 2024年第9期630-642,共13页
The precise combination of conflicting biological properties through sophisticated structural and functional design to meet all the requirements of anastomotic healing is of great demand but remains challenging.Here,w... The precise combination of conflicting biological properties through sophisticated structural and functional design to meet all the requirements of anastomotic healing is of great demand but remains challenging.Here,we develop a smart responsive anastomotic staple(Ti–OH-MC)by integrating porous titanium anastomotic staple with multifunctional polytannic acid/tannic acid coating.This design achieves dynamic sequential regulation of antibacterial,anti-inflammatory,and cell proliferation properties.During the inflammatory phase of the anastomotic stoma,our Ti–OH-MC can release tannic acid to provide antibacterial and anti-inflammatory properties,together with immune microenvironment regulation function.At the same time,as the healing progresses,the multifunctional coating gradually falls off to expose the porous structure of the titanium anastomotic staple,which promotes cell adhesion and proliferation during the later proliferative and remodeling phases.As a result,our Ti–OH-MC exceeds the properties of clinically used titanium anastomotic staple,and can effectively promote the healing.The staple’s preparation strategy is simple and biocompatible,promising for industrialisation and clinical application.This work provides an effective anastomotic staple for anastomotic stoma healing and serve as a reference for the functional design and preparation of other types of titanium-based tissue repair materials. 展开更多
关键词 Anastomotic staple Smart responsive Coating Tannic acid Anastomotic stoma healing
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Synthesis,Structure,and Surface Photo-electric Properties of a New Zn(Ⅱ)Coordination Complex Constructed from 2-(1H-benzotriazol-1-yl)acetic Acid and 1,10-Phenanthroline Ligands 被引量:2
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作者 李家明 史忠丰 何坤欢 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第1期135-142,共8页
A new binuclear Zn^Ⅱ coordination complex,Zn2(bta)(phen)2(Cl)3(1,Hbta = 2-(1Hbenzotriazol-1-yl)acetic acid and phen = 1,10-phenanthroline),has been synthesized and characterized by single-crystal X-ray diff... A new binuclear Zn^Ⅱ coordination complex,Zn2(bta)(phen)2(Cl)3(1,Hbta = 2-(1Hbenzotriazol-1-yl)acetic acid and phen = 1,10-phenanthroline),has been synthesized and characterized by single-crystal X-ray diffraction,IR spectroscopy,elemental,and photoluminescent analysis.Complex 1 crystallizes in triclinic system,space group P1 with a = 9.3040(19),b = 10.694(2),c =16.841(3) A°,α = 101.18(3),β = 105.77(3),γ = 91.72(3)°,V= 1575.8(5) A°3,C(32)H(22)Zn2Cl3N7O2,Mr =773.66,Dc = 1.631 g/cm^3,Z = 2,F(000) = 780,μ = 1.820 mm^-1,the final R = 0.1238 and wR =0.1131.X-ray diffraction analyses indicate that 1 displays two crystallographic independent Zn^Ⅱmetal centers with a distorted tetragonal pyramidal(ZnN4O) and a tetrahedral(ZnNCl3) geometries,respectively.The phen serves as a common N,N'-bidentate ligand,and the bta^- as a unique N,O-bridged ligand in 1.In the crystal,1 forms a stable 3D supramolecular architecture by trifurcated hydrogen bonding C-H…C1 interactions and C-H…π,π…π stacking.1 showed photo-electric conversion properties. 展开更多
关键词 photo-electric property zinc(Ⅱ) complex 2-(1H-benzotriazol-1-yl)acetic acid synthesis crystal structure
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Blocking Behavior of Organic Solid Phase in the Carbon Dioxide Multiphase and Multicomponent Displacement Process
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作者 Peng Yu 《Journal of Power and Energy Engineering》 2019年第1期183-189,共7页
Better dealing with carbon issues can support the management of current greenhouse gas emissions while achieving energy economic diversification and energy security. Carbon dioxide displacement has become the most ack... Better dealing with carbon issues can support the management of current greenhouse gas emissions while achieving energy economic diversification and energy security. Carbon dioxide displacement has become the most acknowledged and practical method in enhanced oil recovery system. This is because of its oil sweep efficiency and ability to reduce the level of greenhouse gas emission. Nevertheless, it would lead to the organic solid phase deposition, which causes the changes of the wettability and the damages of wellbores and reservoirs. In this study, we used slim tube test and component test to research the dynamic characteristics of displacement process. In addition, the mechanism of porous media blockage was also investigated. Results show that when the displacement pressure closed to the minimum miscibility pressure, reservoir blockage in pore throat could happen. Component test characterizes that during near miscible displacement process, the components of oil sample varied obviously, the variation range of peak component carbon marks fluctuated strongly. Crude oil component differentiation could happen after carbon dioxide fully contacted with oil. Besides, the rapid extraction mechanism of aromatic hydrocarbons played a significant role in this process under such condition. The reason is that the solubility of saturated hydrocarbons to asphaltene and non-hydrocarbons is obviously weaker than aromatic hydrocarbons. Controlling the pressure is considered as an important link to prevent the occurrence of blocking in the carbon dioxide multiphase and multicomponent displacement process. 展开更多
关键词 BLOCKING BEHAVIOR ORGANIC Solid Phase Carbon Dioxide Displacement MULTIPHASE and MULTICOMPONENT Near Minimum MISCIBLE Pressure
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Analysis of the Law of Organic Solid Phase Precipitation and Deposition during Carbon Dioxide Displacement Process
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作者 Peng Yu 《Journal of Geoscience and Environment Protection》 2019年第1期118-122,共5页
Carbon Capture, Utilization and Storage (CCUS) has been regarded as an indispensable, strategic and pressing technology to reduce anthropogenic carbon dioxide emissions, and mitigate the severe consequences of climate... Carbon Capture, Utilization and Storage (CCUS) has been regarded as an indispensable, strategic and pressing technology to reduce anthropogenic carbon dioxide emissions, and mitigate the severe consequences of climate change. Its utilization and storage play important roles in this system and they can be applied for oceanic and underground geological sequestration especially for the oil gas reservoir that needs to improve recovery. For the carbon dioxide flooding process, the crude oil displacement generally shows a better performance with the increase of the pressure. However, carbon disposal is always complex. It could encounter organic solid phase precipitation and deposition in near miscibility environment. The law of multiphase and multicomponent diversification in the whole processes is still poorly understood. We thus used the method of slim tube to get dynamic data during the process. Indeed, the interval of near minimum miscibility pressure was determined. Analysis results of injectivity index and productivity index show that the reservoir blockage primarily appears as the displacement pressure is higher than the near minimum miscibility lower limit pressure and plays an important role in the production capacity. Extortionate or low pressure is not conducive to carbon dioxide displacement. 展开更多
关键词 ORGANIC Solid Phase Precipitaion and DEPOSITION Carbon Dioxide DISPLACEMENT BLOCKAGE Near Minimum MISCIBILITY Pressure
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Hydrothermal Synthesis, Crystal Structure and Surface Photo-electric Properties of a New Nickel(Ⅱ) 3-D Metalorganic Framework Constructed from the Rigid 1,4-Bis(imidazol-1-yl) benzene Ligand
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作者 王爱荣 李家明 +2 位作者 史忠丰 何坤欢 高健 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2017年第4期647-653,共7页
A new 3-D nickel(Ⅱ) metal-organic framework(MOFs) with formula [Ni(bib)_2(SO_4)]_n(1), where bib = 1,4-bis(imidazol-1-yl)benzene, has been synthesized and characterized by single-crystal X-ray diffraction... A new 3-D nickel(Ⅱ) metal-organic framework(MOFs) with formula [Ni(bib)_2(SO_4)]_n(1), where bib = 1,4-bis(imidazol-1-yl)benzene, has been synthesized and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and surface photovoltage spectroscopy(SPS). Complex 1 crystallizes in monoclinic system, space group C2/c with a = 19.5988(6), b = 9.7531(3), c = 11.8146(4) ?, β = 96.185(3)°, V = 2245.20(12) ?~3, C_(24)H_(20)N_8NiO_4S, M_r = 575.25, D_c = 1.702 g/cm^3, Z = 4, F(000) = 1184, μ = 1.011 mm-1, the final R = 0.0293 and w R = 0.0702. X-ray diffraction analyses indicated that the center Ni^(2+) ion is six-coordinated with an O_2N_4 donor set of two μ_2-SO_4^(2–) and four bib ligands, resulting in an ideal octahedral geometry. Topological analysis on complex 1 considers each Ni^(2+) as a 6-connected node, while bib and sulfate ion as linkers, giving an α-Po topology with short Schl?fli symbol 412·63. In the crystal packing, the components interact with pairs of intermolecular C–H×××O hydrogen bonds. The SPS of 1 indicates that there are positive response bands in the range of 300~600 nm showing photo-electric conversion properties. 展开更多
关键词 photo-electric property nickel(Ⅱ) complex 1 4-bis(imidazol-1-yl)benzene synthesis crystal structure
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An Integrated Method of Data Mining and Flow Unit Identification for Typical Low Permeability Reservoir Prediction
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作者 Peng Yu 《World Journal of Engineering and Technology》 2019年第1期122-128,共7页
With the development of oilfield exploration and mining, the research on continental oil and gas reservoirs has been gradually refined, and the exploration target of offshore reservoir has also entered the hot studyst... With the development of oilfield exploration and mining, the research on continental oil and gas reservoirs has been gradually refined, and the exploration target of offshore reservoir has also entered the hot studystage of small sand bodies, small fault blocks, complex structures, low permeability and various heterogeneous geological bodies. Thus, the marine oil and gas development will inevitably enter thecomplicated reservoir stage;meanwhile the corresponding assessment technologies, engineering measures andexploration method should be designed delicately. Studying on hydraulic flow unit of low permeability reservoir of offshore oilfield has practical significance for connectivity degree and remaining oil distribution. An integrated method which contains the data mining and flow unit identification part was used on the flow unit prediction of low permeability reservoir;the predicted results?were compared with mature commercial system results for verifying its application. This strategy is successfully applied to increase the accuracy by choosing the outstanding prediction result. Excellent computing system could provide more accurate geological information for reservoir characterization. 展开更多
关键词 Low PERMEABILITY Reservoir Offshore OILFIELD Hydraulic FLOW UNIT FLOW UNIT IDENTIFICATION Data Mining
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Process Optimization of Extraction Technique of Polysaccharide from Leaves of Dendrobium officinale
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作者 Yunying ZHENG Yanzhen YIN +1 位作者 Shuming ZHONG Ruirui ZHANG 《Medicinal Plant》 CAS 2018年第5期27-30,35,共5页
[Objectives] To optimize the extraction process of polysaccharides from leaves of Dendrobium officinale. [Methods]The polysaccharides from D. officinale were extracted by internal boiling method. The extraction rate o... [Objectives] To optimize the extraction process of polysaccharides from leaves of Dendrobium officinale. [Methods]The polysaccharides from D. officinale were extracted by internal boiling method. The extraction rate of polysaccharides from D. officinale was studied.Based on the single factor experiment,the L_9( 3~3) orthogonal experiment was designed to optimize the extraction process of polysaccharides from D. officinale. [Results]The optimum process for extracting polysaccharides from D. officinale by internal boiling method was as follows:1. 00 g of D. officinale powder was desorbed with 6. 0 mL of 20% ethanol for 20 min,35. 0 mL of 90℃ water was rapidly added,and the extraction time was 5 min. [Conclusions] Under this condition,the extraction rate of polysaccharides from D. officinale was 12. 31%,which was 3. 75 percentage points higher than that of traditional reflux extraction. 展开更多
关键词 LEAVES of DENDROBIUM officinale INTERNAL BOILING method POLYSACCHARIDES Extraction
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Methane hydrate formation in porous media:Overview and perspectives
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作者 Yue Qin Liyan Shang +3 位作者 Zhenbo Lv Jianyu He Xu Yang Zhien Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第11期454-480,I0012,共28页
Natural gas hydrate(NGH)has recently received more attention as a cleaner alternative energy source that not only reduces carbon emissions caused by the use of conventional fossil fuels but also plays a key role in gl... Natural gas hydrate(NGH)has recently received more attention as a cleaner alternative energy source that not only reduces carbon emissions caused by the use of conventional fossil fuels but also plays a key role in global climate change.Furthermore,hydrate-based technologies,particularly hydrate-based carbon capture and storage,have enormous promise for decreasing global carbon emissions,and porous media play an important role in all hydrate-based technologies.Accordingly,this paper reviews the recent applications of porous media in the field of methane hydrate(MH)formation and analyzes the influence of porous media systems on MH phase equilibria and formation kinetics.This is because the efficiency of hydrate-based technologies is determined mainly by the phase equilibrium and formation kinetics of hydrates.The influence of the nature of the media on MH formation in porous media systems is comprehensively summarized to understand how porous media can efficiently enhance the kinetics of hydrate formation.Promoters are necessary for rapid hydrate formation,and the effect of various promoters on MH formation was also evaluated.Based on the aforementioned overview and understanding,the mechanisms for MH formation in various porous media systems are proposed.Finally,the future perspectives and challenges of hydrate-based technologies in tackling global climate change were discussed.This review provides a fundamental understanding of the application and development of porous media in rapid hydrate formation,a fair evaluation of the performance of various porous media systems,and critical insights into major research foci. 展开更多
关键词 Methane hydrate Porous media Phase equilibrium KINETICS Carbon neutrality
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调控三芴酮基共价有机框架中的局域极化促进光催化析氢活性 被引量:2
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作者 郝磊 沈荣晨 +4 位作者 秦朝超 李能 胡浩斌 梁桂杰 李鑫 《Science China Materials》 SCIE EI CAS CSCD 2024年第2期504-513,共10页
局部电荷的强离域和强偶极矩是影响共价有机框架(COFs)基光催化剂催化析氢性能的两个关键因素.然而,基于精确的调控结构模型来系统研究这种构效关系的报告相对较少.本研究提出了一种新的策略,通过合理的设计,制备了三种三芴酮基COFs,通... 局部电荷的强离域和强偶极矩是影响共价有机框架(COFs)基光催化剂催化析氢性能的两个关键因素.然而,基于精确的调控结构模型来系统研究这种构效关系的报告相对较少.本研究提出了一种新的策略,通过合理的设计,制备了三种三芴酮基COFs,通过在分子水平上调控单体的结构和偶极来提高局部电荷离域指数.我们重点研究这三种三芴酮基COF的局部电荷离域与光催化性能之间的构效关系.在不同三芴酮基COF中,1,3,5-三(对甲酰基苯基)苯基COF(TeTpb-COF)展现出21.6 mmol g^(-1)h^(-1)的最高析氢速率,与2,4,6-三(4-醛基苯基)-1,3,5-三嗪基COF(TeTt-COF,0.2mmol g^(-1)h^(-1))相比,光催化析氢性能提高了108倍.这种性能的增强可归因于其强大的分子内置电场提高了供体-受体嵌段单元中光生电荷的有效分离效率.这项工作证实了调整构建块可以极大增强三芴酮基COFs中的局部偶极矩,从而显著改善光催化析氢性能.构建模块的调控策略为创建高效的新型COF基光催化析氢平台提供了新机会. 展开更多
关键词 covalent organic frameworks photocatalytic hydrogen evolution truxenone dipole moment local charge delocalization
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Molecular Design of TPD-based Organic A-π-D-π-A Dyes for Dye-sensitized Solar Cells 被引量:1
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作者 CAO Xing-bo 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2013年第2期355-360,共6页
An interesitng class of organicA-π-D-π-A dyes based on an N,N,N',N'-tetraphenylbenzidine(TPD) unit as donor was designed and synthesized for dye-sensitized solar cells(DSSCs). TPD-4-based DSSCs gave a short c... An interesitng class of organicA-π-D-π-A dyes based on an N,N,N',N'-tetraphenylbenzidine(TPD) unit as donor was designed and synthesized for dye-sensitized solar cells(DSSCs). TPD-4-based DSSCs gave a short circuit photocurrent density(Jsc) of 16.67 mA/cm2, a open circuit voltage(Voc) of 0.635 V and a fill factor(f/) of 0.68, achieving a solar-to-electricity conversion efficiency(r/) of 7.22% in preliminary tests. The N3-sensitized device gave an η value of 8.02% with a Jsc of 18.81 mA/cm2, a Voc of 0.630 V and anffof 0.68 under the same conditions. The incident photo-to-current efficiency(IPCE) values above 70% observed in a range of 460 to 600 nm with a maximum value of 80% at 500 nm indicate that the TPD-4-based DSSC shows a high performance. Under the same conditions, the DSSC based on N3 provided the IPCE values above 70% in a range of 490 to 580 nm with a maximum value of 76% at 500 nm. Both further optimization of the device processing and structural modification of these dyes are an- ticipated to make the device give even better performances. 展开更多
关键词 N N N' N'Tetraphenylbenzidine(TPD) unit Dye-sensitized solar cell Solar-to-electricity conversionefficiency
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