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Recent Advances in Cadmium Sulfide-Based Photocatalysts for Photocatalytic Hydrogen Evolution 被引量:4
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作者 Xinlong Zheng Yuhao Liu +6 位作者 Yuqi Yang Yiming Song Peilin Deng Jing Li Weifeng Liu Yijun Shen Xinlong Tian 《Renewables》 2023年第1期39-56,共18页
High-efficiency photocatalytic hydrogen evolution(PHE)relies on the development of inexpensive,stable,and efficient photocatalysts.Cadmium sulfide(CdS),as a typical binary metal sulfide,has attracted considerable rese... High-efficiency photocatalytic hydrogen evolution(PHE)relies on the development of inexpensive,stable,and efficient photocatalysts.Cadmium sulfide(CdS),as a typical binary metal sulfide,has attracted considerable research attention due to its negative conduction band position,narrow band gap for visible-light response,and strong driving force for PHE.However,the construction of CdSbased photocatalysts and the PHE rate still require improvement for practical applications.In this review,recent advances in CdS-based photocatalysts for PHE via water splitting are systematically summarized.First,the semiconductor properties of CdS,including the crystal and band structures,are briefly introduced.Afterward,the fundamental mechanisms of PHE using semiconductor photocatalysts via water splitting are discussed.Subsequently,the photoactivity of bare CdS with different morphologies and structures,CdS with cocatalyst loading,and CdS-based heterojunction photocatalysts are reviewed and discussed in detail.Finally,the challenges and prospects for exploring advanced CdS-based photocatalysts are provided. 展开更多
关键词 photocatalytic hydrogen evolution cadmium sulfide morphologies and structures COCATALYSTS HETEROJUNCTION
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Cadmium sulfide thin films growth by chemical bath deposition 被引量:2
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作者 S.Hariech M.S.Aida +5 位作者 J.Bougdira M.Belmahi G.Medjahdi D.Genève N.Attaf H.Rinnert 《Journal of Semiconductors》 EI CAS CSCD 2018年第3期50-56,共7页
Cadmium sulfide(Cd S) thin films have been prepared by a simple technique such as chemical bath deposition(CBD). A set of samples Cd S were deposited on glass substrates by varying the bath temperature from 55 to ... Cadmium sulfide(Cd S) thin films have been prepared by a simple technique such as chemical bath deposition(CBD). A set of samples Cd S were deposited on glass substrates by varying the bath temperature from 55 to 75 °C at fixed deposition time(25 min) in order to investigate the effect of deposition temperature on Cd S films physical properties. The determination of growth activation energy suggests that at low temperature Cd S film growth is governed by the release of Cd^(2+) ions in the solution. The structural characterization indicated that the Cd S films structure is cubic or hexagonal with preferential orientation along the direction(111) or(002), respectively. The optical characterization indicated that the films have a fairly high transparency, which varies between55% and 80% in the visible range of the optical spectrum, the refractive index varies from 1.85 to 2.5 and the optical gap value of which can reach 2.2 e V. It can be suggested that these properties make these films perfectly suitable for their use as window film in thin films based solar cells. 展开更多
关键词 thin films chemical bath cadmium sulfide solar cell
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Self-aligned on-chip coupled photonic devices using individual cadmium sulfide nanobelts
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作者 Jacob S.Berger Ho-Seok Ee +3 位作者 Mingliang Ren Daksh Agarwal Wenjing Liu Ritesh Agarwal 《Nano Research》 SCIE EI CAS CSCD 2020年第5期1413-1418,共6页
Nanowires(NWs)and nanobelts(NBs)have been widely studied and fabricated into a variety of nanoscale devices such as light emitting diodes(LEDs),lasers and biosensors.These unique materials have attracted sustained att... Nanowires(NWs)and nanobelts(NBs)have been widely studied and fabricated into a variety of nanoscale devices such as light emitting diodes(LEDs),lasers and biosensors.These unique materials have attracted sustained attention due to their novel properties,ease of growth,and the ability to fabricate highly engineered devices.However,their widespread application remains hindered due to the difficulty in integrating multiple NWs or NBs together for more complex devices.Integration of multiple NWs and NBs together on the same chip can enable the coupling of different devices to help realize complex on-chip architectures such as photonic integrated circuits or nanoscale diagnostic tools,which currently require outcoupling using larger components.In this letter we report the coupling of on-chip NB LEDs and photodetectors using a single,precisely self-aligned,cadmium sulfide(CdS)NB fabricated on a silicon-on-insulator(SOI)substrate.Electroluminescence generated by the CdS NB is waveguided and measured across the self-aligned device and demonstrates an on/off ratio of 10^2-10^3.This work describes a new method for fabricating and integrating more complex nanoscale devices that can enable advances in areas such as on-chip optical computational components and nanoscale optical biodiagnostics. 展开更多
关键词 cadmium sulfide NANOBELTS NANOWIRES light emitting diode optical interconnects
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Cadmium sulfide as bifunctional mimics of NADH oxidase and cytochrome c reductase takes effect at physiological pH
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作者 Hao Wang Jinxing Chen +4 位作者 Qing Dong Xiuna Jia Dan Li Jin Wang Erkang Wang 《Nano Research》 SCIE EI CSCD 2022年第6期5256-5272,共17页
Recently,a study of mimic enzyme has received more attentions.However,the investigation on the oxidoreductase activity of electron mediators in the biological respiratory chain is still rare.Herein,we found that cadmi... Recently,a study of mimic enzyme has received more attentions.However,the investigation on the oxidoreductase activity of electron mediators in the biological respiratory chain is still rare.Herein,we found that cadmium sulfide(CdS)nanorods can catalyze the formation of superoxide anions.Due to the role of the photo-generated holes and the nicotinamide adenine dinucleotide(NADH)oxidation promoted by superoxide anion(O_(2)^(•−)),the CdS exhibits NADH oxidase-like activity and can be coupled with dehydrogenase to realize the recycling of NADH.It is worth mentioning that the bio-electron acceptor,cytochrome c(Cyt c),as a chromogenic substrate,can accept electrons transferred from O_(2)^(•−),which demonstrates the Cyt c reductase-like activity of CdS under physiological pH conditions.For different substrates,O_(2)^(•−)induced from CdS show oxidizing capacity for NADH and reducing capacity for Cyt c,which provides a new perspective for the in-depth study of new nanozyme. 展开更多
关键词 cytochrome c reductase nicotinamide adenine dinucleotide(NADH)oxidase superoxide anions enzyme mimic cadmium sulfide
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Resonant and nonresonant second-harmonic generation in a single cadmium sulfide nanowire
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作者 黄晓阳 戴舒维 +4 位作者 徐鹏飞 王咏梅 杨青 张勇 肖敏 《Chinese Optics Letters》 SCIE EI CAS CSCD 2017年第6期63-66,共4页
We experimentally investigate the resonant and nonresonant second-harmonic generation in a single cadmium sulfide(Cd S) nanowire. The second-order susceptibility tensor is determined by analyzing the forward secondh... We experimentally investigate the resonant and nonresonant second-harmonic generation in a single cadmium sulfide(Cd S) nanowire. The second-order susceptibility tensor is determined by analyzing the forward secondharmonic signals of the Cd S nanowire. Our results show that(1) d33∕d31=-2.5 at a nonresonant input wavelength of 1050 nm;(2) d33∕d31=-1.9 at a resonant wavelength of 740 nm. The difference can be attributed to the polarization-dependent resonance. 展开更多
关键词 harmonic cadmium resonant sulfide attributed susceptibility tensor characterize sizes spectrometer
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Photocatalytic degradation of methyl orange over ITO/CdS/ZnO interface composite films 被引量:4
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作者 WEI Shouqiang, SHAO Zhongcai, LU Xudong, LIU Ying, CAO Linlin, HE Yan School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110168, China. 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第7期991-996,共6页
ITO/CdS/ZnO interface composite films were successfully prepared by subsequent electrodeposition of CdS and ZnO onto indium tin oxide (ITO) glass substrates. The obtained ITO/CdS/ZnO composite films were characteriz... ITO/CdS/ZnO interface composite films were successfully prepared by subsequent electrodeposition of CdS and ZnO onto indium tin oxide (ITO) glass substrates. The obtained ITO/CdS/ZnO composite films were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis spectroscopy. The photocatalytic activity of ITO/CdS/ZnO composite films were investigated using methyl orange (MO) as a model organic compound under UV light irradiation. The influence of operating parameters on MO degradation including initial concentration of MO, pH value of solution, and inorganic anion species over the composite films were examined. A blue shift of absorption threshold was observed for the ITO/CdS/ZnO film in comparison with ITO/ZnO film. ITO/CdS/ZnO composite films prepared under specific conditions showed a higher photocatalytic activity than that of ITO/ZnO films. It was also found that the photocatalytic degradation of MO on the composite films followed pseudo-first order kinetics. 展开更多
关键词 ELECTRODEPOSITION zinc oxide cadmium sulfide composite film photocatalytic activity
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Ultrahigh photocatalytic hydrogen evolution performance of coupled 1D CdS/1T-phase dominated 2D WS_(2) nanoheterojunctions 被引量:2
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作者 Chao Ding Chengxiao Zhao +1 位作者 Shi Cheng Xiaofei Yang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第2期403-409,共7页
Solar-powered photocatalytic hydrogen production from water using semiconductors provides an eco-friendly and promising approach for converting solar energy into hydrogen fuel.Bulk semiconductors generally suffer from... Solar-powered photocatalytic hydrogen production from water using semiconductors provides an eco-friendly and promising approach for converting solar energy into hydrogen fuel.Bulk semiconductors generally suffer from certain limitations,such as poor visible-light utilization,rapid recombination of charge carriers,and low catalytic capability.The key challenge is to develop visible-light-driven heterojunction photocatalysts that are stable and highly active during the water splitting process.Here,we demonstrate the integration of one-dimensional(1D)Cd S nanorods with two-dimensional(2D)1 T-phase dominated WS_(2) nanosheets for constructing mixed-dimensional heterojunctions for the photocatalytic hydrogen evolution reaction(HER).The resulting 1D CdS/2D WS_(2) nanoheterojunction exhibited an ultrahigh hydrogen-evolution activity of~70 mmol·g^(-1)·h^(-1) that was visible to the naked eye,as well as long-term stability under visible light illumination.The results reveal that the synergy of hybrid nanoarchitectures and intimate interfacial contact between the 1D Cd S nanorods and 1T-phase dominated 2D WS_(2) nanosheets facilitates charge carrier transport,which is beneficial for achieving superior hydrogen evolution. 展开更多
关键词 cadmium sulfide Tungsten disulfide Photocatalytic hydrogen evolution HETEROJUNCTION Interfacial coupling
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Enhanced photocatalytic degradation of methyl orange by CdS quantum dots sensitized platelike WO_3 photoelectrodes 被引量:2
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作者 文瑾 刘灿军 +2 位作者 杜勇 胡传跃 田修营 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第12期4551-4559,共9页
CdS quantum dots sensitized platelike WO_3 photoelectrodes were successfully synthesized by a facile hydrothermal method and a modified chemical bath deposition(CBD) technique.To further improve the stability of the p... CdS quantum dots sensitized platelike WO_3 photoelectrodes were successfully synthesized by a facile hydrothermal method and a modified chemical bath deposition(CBD) technique.To further improve the stability of the photoelectrodes in alkaline environment,the platelike WO_3 films were treated with TiCl_4 to form a nano-TiO_2 buffer layer on the WO_3 plate surface before loading CdSQDs.The resulting electrodes were characterized by using XRD,SEM,HR-TEM and UV-vis spectrum.The photocatalytic activity of the resulting electrodes was investigated by degradation of methyl orange(MO) in aqueous solution.The photoelectrochemical(PEC) property of the resulting electrodes was also characterized by the linear sweep voltammetry.The results of both the degradation of MO and photocurrent tests indicated that the as-prepared CdSQDs sensitized WO_3 platelike photoelectrodes exhibit a significant improvement in photocatalytic degradation and PEC activity under visible light irradiation,compared with unsupported CdSQDs electrodes.Significantly,coating the WO_3 plates with nano-TiO_2 obviously facilitate the charge separation and retards the charge-pair recombination,and results in a highest activity for QDsCdS/TiO_2/WO_3 photoelectrodes. 展开更多
关键词 photocatalytic degradation cadmium sulfide platelike WO3 PHOTOELECTRODE Nano-TiO2 buffer layer
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A Simple Approach to Fabricate CdS-SiO_2 Hybrid Microspheres by Producing CdS Nanoparticles on the Surface of Thiolated SiO_2 Microspheres 被引量:2
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作者 HAN Kun XIANG Zheng WANG Zheng WANG Chun-lei LI Min-jie ZHANG Jun-hu YANG Bai 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2006年第1期76-79,共4页
We have developed a simple synthetic method to prepare the hybrid microspheres of CdS nanoparticles on the surface of silica microspheres modified by(3-mercaptopropyl) trimethoxysilane(MPS). The--SH groups of MPS ... We have developed a simple synthetic method to prepare the hybrid microspheres of CdS nanoparticles on the surface of silica microspheres modified by(3-mercaptopropyl) trimethoxysilane(MPS). The--SH groups of MPS can bind with the Cd^2+ ions on the surface of SiO2. When thioacetamide releases H2S, the nanosized CdS particles( 1-6 nm) will successfully be generated on the silica surface under the experimental conditions. The size of the CdS nanoparticles was found to be related to the concentration of Cd^2 + feed and the size of silica spheres, the higher the concentration of Cd^2+ and the larger of silica microspheres, the bigger the size of CdS nanoparticles. Techniques including UV, PL, TEM and XPS were used to characterize the CdS-SiO2 hybrid microspheres. 展开更多
关键词 cadmium sulfide Silicon dioxide NANOPARTICLE Hybrid microspheres
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Synergy of adsorption and visible light photocatalysis to decolor methyl orange by activated carbon/nanosized CdS/chitosan composite 被引量:1
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作者 蒋茹 朱华跃 +2 位作者 曾光明 肖玲 管玉江 《Journal of Central South University》 SCIE EI CAS 2010年第6期1223-1229,共7页
Activated carbon/nanosized CdS/chitosan(AC/n-CdS/CS) composites as adsorbent and photoactive catalyst were prepared under low temperature(≤60 ℃) and ambient pressure.Methyl orange(MO) was chosen as a model pollutant... Activated carbon/nanosized CdS/chitosan(AC/n-CdS/CS) composites as adsorbent and photoactive catalyst were prepared under low temperature(≤60 ℃) and ambient pressure.Methyl orange(MO) was chosen as a model pollutant to evaluate synergistic effect of adsorption and photocatalytic decolorization by this innovative photocatalyst under visible light irradiation.Effects of various parameters such as catalyst amount,initial MO concentration,solution pH and reuse of catalyst on the decolorization of MO were investigated to optimize operational conditions.The decolorization of MO catalyzed by AC/n-CdS/CS fits the Langmuir-Hinshelwood kinetics model,and a surface reaction,where the dyes are absorbed,is the controlling step of the process.Decolorization efficiency of MO is improved with the increase in catalyst amount within a certain range.The photodecolorization of MO is more efficient in acidic media than alkaline media.The decolorization efficiency of MO is still higher than 84% after five cycles and 60 min under visible light irradiation,which confirms the reusability of AC/n-CdS/CS composite catalyst. 展开更多
关键词 cadmium sulfide chitosan activated carbon ADSORPTION visible light photocatalysis methyl orange DECOLORIZATION
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RESEARCH ON FACTORS AFFECTING THE COLOURATION OF RED GLASS-CERAMICS 被引量:1
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作者 赵前 程金树 +1 位作者 王怀德 袁坚 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1996年第3期46-52,共7页
In this pater, effect of alkali, zinc oxide and colorants such as cadmiun sulfide and selenium powder on the colouration of the red glass-ceramic materials in the CaO-Al2O3-SiO2 system has been studied. The relevant l... In this pater, effect of alkali, zinc oxide and colorants such as cadmiun sulfide and selenium powder on the colouration of the red glass-ceramic materials in the CaO-Al2O3-SiO2 system has been studied. The relevant laws have been presented and analyzed. 展开更多
关键词 red glass-ceramics cadmium sulfide selenium powder colouration agent
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Enhancement of Raman Scattering of 1,4-Benzenedithiol by CdS Nanoparticles Assembled on a Silver Surface
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作者 ZHOUQun ZHAOHong LIXiao-wei ZHENGJun-wei 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2004年第2期138-141,共4页
CdS nanoparticles were assembled on the smooth surface of a piece of silver by using 1,4-benzenedithiol as coupling molecules. The SEM and resonance Raman spectroscopic characterizations demonstrate that the nanosized... CdS nanoparticles were assembled on the smooth surface of a piece of silver by using 1,4-benzenedithiol as coupling molecules. The SEM and resonance Raman spectroscopic characterizations demonstrate that the nanosized structure of CdS was still preserved upon assembly, and a two-dimensional structure of CdS nanoparticles was formed on the substrate surface. The FT-Raman spectra indicate that 1,4-benzenedithiol was coupled between CdS nanoparticles and the silver surface with a tilted orientation. The Raman scattering of 1,4-benzenedithiol was substantially enhanced by the assembled CdS nanoparticles, probably due to the alteration of the polarizability of 1,4-benzenedithiol and the electromagnetic interaction between the dipoles of the CdS particle with its image in the metal substrate. 展开更多
关键词 cadmium sulfide 1 4-Benzenedithiol Nanoparticle Self-assembly Raman spectroscopy
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Formation and Characterization of CdS Hollow Structures
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作者 胡鹏 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2008年第3期425-427,共3页
CdS hollow structures were built up by using the one pot method and using carbon disulfide (CS2) and ethylenediamine as starting materials. CS2 is insoluble in water and could form metastable oil droplets in the wat... CdS hollow structures were built up by using the one pot method and using carbon disulfide (CS2) and ethylenediamine as starting materials. CS2 is insoluble in water and could form metastable oil droplets in the water at a moderate temperature. The oil droplets formed chains in the circumvolving water. CdS crystals grew and mineralized on the surfaces of the CS2 droplet chains, forming CdS shells around the unreacted CS2 cores. After the surrounding temperature was raised above the boiling point of CS2, the unreacted CS2 cores vaporized, leaving the CdS shelled hollow structures. The CdS hollow structures were characterized by using a transmission electron microscope, an X-ray diffractometer, a UV-Visible spectrophotometer and a fluorescence spectrophotometer. The CdS hollow structures were mainly tubes with closed ends. The exterior diameter and the interior diameter of tubes were about 50 nm and about 15 nm, respectively. Compared with the absorption onset wavelength of the bulk CdS, the CdS hollow structures exhibited a blue shift of about 57 nm. While excited at 213 nm, the CdS hollow structures emitted greenish blue light centered at 470 nm. 展开更多
关键词 NANOMATERIAL optical material cadmium sulfide hollow structure
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Characterization and Visible Light Photocatalytic Activity of Cucurbit[n]urils/CdS-MoS_(2)
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作者 Juan-juan Shi An-ting Zhao +2 位作者 Zhang-mei Peng Li-xia Yang Chun-tao Zhou 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2022年第4期697-704,I0150,I0151,共10页
In order to reduce the impact of CdS photogenerated electron-hole recombination on its photocatalytic performance,a narrow band gap semiconductor MoS_(2) and organic macromolecular cucurbit[n]urils(Q[n])were used to m... In order to reduce the impact of CdS photogenerated electron-hole recombination on its photocatalytic performance,a narrow band gap semiconductor MoS_(2) and organic macromolecular cucurbit[n]urils(Q[n])were used to modify CdS.Q[n]/CdS-MoS_(2)(n=6,7,8)composite photocatalysts were synthesized by hydrothermal method.Infrared spectroscopy,X-ray diffraction,X-ray photoelectron spectroscopy,field emission scanning electron microscopy,ultraviolet-visible and photoluminescence spectrum were used to characterize the structure,morphology and optical properties of the products,and the catalytic degradation of the solutions of methylene blue,rhodamine B and crystal violet by Q[n]/CdS-MoS_(2) composite catalyst was investigated.The results showed that the Q[n]played a regulatory role on the growth and crystallization of CdS-MoS_(2) particles,Q[n]/CdS-MoS_(2)(n=6,7,8)formed flower clusters with petal-like leaves,the flower clusters of petal-like leaves increased the surface area and active sites of the catalyst,the Q[n]/CdS-MoS_(2) barrier width decreased,the electron-hole pair separation efficiency was improved in the Q[6]/Cds-MoS_(2).Q[n]makes the electron-hole pair to obtain better separation and migration.The Q[6]/CdS-MoS_(2) and Q[7]/CdS-MoS2 have good photocatalytic activity for methylene blue,and the catalytic process is based on hydroxyl radical principle. 展开更多
关键词 Hydrothermal method cadmium sulfide Narrow band gap Cucurbit[n]uril COORDINATION
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Effects of Growth Conditions on the Microstructure Characteristics of CdS Thin Films by AP-MOCVD
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作者 Dong Dong Xiao-Bo Liu Jiang-Bo Li Cheng-Wei Shang Wen-Cheng Hu 《Journal of Electronic Science and Technology》 CAS 2010年第2期149-153,共5页
Growth of cadmium sulfide (CdS) thin films on glass substrates was carried out by atmospheric pressure metal-organic chemical vapor deposition (AP-MOCVD) using Cd(S2CNEt2)2 as the single precursor. Changes in th... Growth of cadmium sulfide (CdS) thin films on glass substrates was carried out by atmospheric pressure metal-organic chemical vapor deposition (AP-MOCVD) using Cd(S2CNEt2)2 as the single precursor. Changes in the surface morphology of the deposited CdS thin films were investigated by atomic force microscope (AFM) as the function of substrate temperature (Ts), vaporizing temperature (Tv), and Ar flow rate. With the increase of Tv, CdS thin films evolved from pyramidal structure with fine grains to columnar structure with large grains. X-ray diffraction (XRD) patterns indicated that the CdS films had random orientation at the lower Tv and preferred orientation at the higher Tv. In addition, Ts had a great effect on the surface roughness of the CdS films, and a quantum dot-like structural CdS films were obtained in a narrow range of Ts with high Ar flow rate. Furthermore, the optical properties of the CdS films were measured using ultraviolet-visible (UV/VIS) spectrometer. 展开更多
关键词 Index Terms---Atmospheric pressure cadmium sulfide (CdS) metal-organic chemical vapor deposition (MOCVD) single precursor surface morphology.
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Electronic Structure of CdS Nanoparticles and CdSe/CdS Nanosystems
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作者 V.Zavodinsky O.Gorkusha A.Kuz’menko 《Semiconductor Science and Information Devices》 2022年第2期29-34,共6页
The electronic states of“wurtzite”CdS nanoparticles and CdSe/CdS nanosystems with up to 80 pairs of Cd-Se or CdS atoms were calculated.The results for CdS particles were compared with the results obtained earlier fo... The electronic states of“wurtzite”CdS nanoparticles and CdSe/CdS nanosystems with up to 80 pairs of Cd-Se or CdS atoms were calculated.The results for CdS particles were compared with the results obtained earlier for CdSe particles of the same size and with published calculations of other authors.The calculated gap values in the range of 2.84 eV~3.78 eV are typical for CdS particles of studied sizes in accordance with results of published data.The CdSe/CdS nanosystems were considered as layered ones and as quantum dots.The layered CdSe/CdS systems with two-layer CdS coverings can be interpreted in terms of combinations of two semiconductors with different energy band gaps(2.6 eV and 3.3 eV),while analogous systems with single-layer CdS coverings do not demonstrate a two-gap electron structure.Simulation of a CdSe/CdS quantum dot shows that the single-layer CdS shell demonstrates a tendency for the formation of the electronic structure with two energy gaps:approximately of 2.5 eV and 3.0 eV. 展开更多
关键词 NANOPARTICLES cadmium sulfide cadmium selenide Energy gap Modeling with pseudopotentials
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Rhodium complex-anchored and supramolecular polymer-grafted CdS nanoflower for enhanced photosynthesis of H_(2)O_(2) and photobiocatalytic C–H bond oxyfunctionalization
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作者 Hongwei Jia Xiaoyang Yue +7 位作者 Yuying Hou Fei Huang Cuiyao Cao Feifei Jia Guanhua Liu Xiaobing Zheng Yunting Liu Yanjun Jiang 《Frontiers of Chemical Science and Engineering》 SCIE EI CSCD 2024年第10期73-82,共10页
Unspecific peroxygenases exhibit high activity for the selective oxyfunctionalization of inert C(sp3)–H bonds using only H_(2)O_(2) as a clean oxidant,while also exhibiting sensitivity to H_(2)O_(2) concentration.CdS... Unspecific peroxygenases exhibit high activity for the selective oxyfunctionalization of inert C(sp3)–H bonds using only H_(2)O_(2) as a clean oxidant,while also exhibiting sensitivity to H_(2)O_(2) concentration.CdS-based semiconductors are promising for the photosynthesis of H_(2)O_(2) owing to their adequately negative potential for oxygen reduction reaction via a proton-coupled electron transfer process,however,they suffer from fast H_(2)O_(2) decomposition on the surface of pristine CdS.Therefore,[Cp*Rh(bpy)H_(2)O]2+,a highly selective proton-coupled electron transfer catalyst,was anchored onto a supramolecular polymer-grafted CdS nanoflower to construct an efficient integrated photocatalyst for generating H_(2)O_(2),mitigating the surface issue of pristine CdS,increasing light absorption,accelerating photonic carrier separation,and enhancing oxygen reduction reaction selectivity to H_(2)O_(2).This photocatalyst promoted the light driven H_(2)O_(2) generation rate up to 1345μmol·L^(-1)·g^(-1)·h^(-1),which was 2.4 times that of pristine CdS.The constructed heterojunction photocatalyst could supply H_(2)O_(2) in situ for nonspecific peroxygenases to catalyze the C–H oxyfunctionalization of ethylbenzene,achieving a yield of 81%and an ee value of 99%under optimum conditions.A wide range of substrates were converted to the corresponding chiral alcohols using this photo-enzyme catalytic system,achieving the corresponding chiral alcohols in good yield(51%–88%)and excellent enantioselectivity(90%–99%ee). 展开更多
关键词 cadmium sulfide unspecific peroxygenases photobiocatalysis hydrogen peroxide OXYFUNCTIONALIZATION
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Biosynthetic CdS-Thiobacillus thioparus hybrid for solar-driven carbon dioxide fixation 被引量:2
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作者 Guangyu Liu Feng Gao +3 位作者 Hongwei Zhang Lei Wang Chao Gao Yujie Xiong 《Nano Research》 SCIE EI CSCD 2023年第4期4531-4538,共8页
Synergistically combining biological whole-cell bacteria with man-made semiconductor materials innovates the way for sustainable solar-driven CO_(2)fixation,showing great promise to break through the bottleneck in tra... Synergistically combining biological whole-cell bacteria with man-made semiconductor materials innovates the way for sustainable solar-driven CO_(2)fixation,showing great promise to break through the bottleneck in traditional chemical photocatalyst systems.However,most of the biohybrids require uneconomical organic nutrients and anaerobic conditions for the successful cultivation of the bacteria to sustain the CO_(2)fixation,which severely limits their economic viability and applicability for practical application.Herein,we present an inorganic-biological hybrid system composed of obligate autotrophic bacteria Thiobacillus thioparus(T.thioparus)and CdS nanoparticles(NPs)biologically precipitated on the bacterial surface,which can achieve efficient CO_(2)fixation based entirely on cost-effective inorganic salts and without the restriction of anaerobic conditions.The optimized interface between CdS NPs and T.thioparus formed by biological precipitation plays an essential role for T.thioparus efficiently receiving photogenerated electrons from CdS NPs and thus changing the autotrophic way from chemoautotroph to photoautotroph.As a result,the CdS-T.thioparus biohybrid realizes the solar-driven CO_(2)fixation to produce multi-carbon glutamate synthase and biomass under visible-light irradiation with CO_(2)as the only carbon source.This work provides significant inspiration for the further exploration of the solar-driven self-replicating biocatalytic system to achieve CO_(2)fixation and conversion. 展开更多
关键词 biohybrids solar-driven CO_(2)fixation carbon cycle autotrophic bacteria Thiobacillus thioparus cadmium sulfide
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Engineering interfacial band hole extraction on chemical-vapor-deposited MoS 2/CdS core-shell heterojunction photoanode:The junction thickness effects on photoelectrochemical performance
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作者 Zhiyuan Peng Yilu Su +1 位作者 Maziar Jafari Mohamed Siaj 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第36期107-118,共12页
Heterojunction fabrication is a promising strategy that can greatly boost the charge carrier separation and improve the solar-to-hydrogen conversion efficiency of photoelectrochemical(PEC)cells.However,such technology... Heterojunction fabrication is a promising strategy that can greatly boost the charge carrier separation and improve the solar-to-hydrogen conversion efficiency of photoelectrochemical(PEC)cells.However,such technology still suffers from limited contact interfaces.In this study,the chemical vapor deposition(CVD)technique was for the first time used to construct the CdS/MoS_(2)heterojunction photoanode with a unique core-shell nanoarchitecture,in which a continuous crystalline MoS_(2)nanosheet layer was grown directly on one-dimensional(1D)oriented CdS nanorods(NRs)in a plane-to-plane stacking fashion.The optimization of junction thickness with adjustable MoS_(2)loading from mono to a few layers was achieved by experimental parameters variation.Systematic characterizations show that the MoS_(2)shell plays a dual role as an optical absorption booster for more photo-exciton generation and a surface passivator of trap states.Meanwhile,the formed heterojunction helps regulate the unidirectional charge migration for a significantly suppressed electron-hole recombination process,which synergistically contributes to higher quantum yield and efficiency.As a result,the optimized CdS/MoS_(2)heterojunction photoanode with 3-layered MoS_(2)wrapping exhibits the highest photocurrent density and photoconversion efficiency,over a two-fold increase,compared to those of pristine CdS and the previously reported CdS/MoS_(2)hetero-junctions.Moreover,due to the rapid hole extraction from CdS and transferred surface oxidation sites,the present CdS/MoS_(2)heterostructure demonstrates better corrosion resistance and higher photostability.The present work is expected to provide a versatile platform for exploiting the CVD technique to develop other MoS_(2)-based heterojunction photoelectrodes with extensive PEC applications. 展开更多
关键词 PHOTOELECTROCHEMICAL Hydrogen evolution Heterojunction fabrication PHOTOANODE cadmium sulfide Molybdenum sulfide
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Hierarchically 1D CdS decorated on 2D perovskite-type La_(2)Ti_(2)O_(7) nanosheet hybrids with enhanced photocatalytic performance 被引量:7
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作者 Liang Mao Xiao-Yan Cai Ming-Shan Zhu 《Rare Metals》 SCIE EI CAS CSCD 2021年第5期1067-1076,共10页
In this paper,a heterojunction of hierarchically one-dimensional(1D)cadmium sulfide(CdS)nanowires decorated on the two-dimensional(2D) La_(2)Ti_(2)O_(7) (LTO)has been fabricated by a simple two-step hydrothermal proce... In this paper,a heterojunction of hierarchically one-dimensional(1D)cadmium sulfide(CdS)nanowires decorated on the two-dimensional(2D) La_(2)Ti_(2)O_(7) (LTO)has been fabricated by a simple two-step hydrothermal process.The structure,morphology and surface chemical composition of CdS/LTO were studied by a variety of characterizations,in which the X-ray photoelectron spectroscopy(XPS)results showed a strong interaction between CdS and LTO through S-O bonds.The typeⅡband alignment of CdS/LTO for favorable electron transfer from CdS to LTO and hole transfer from LTO to CdS was clarified by ultraviolet-visible(UV-Vis)diffuse reflectance spectroscopy and Mott-Schottky(M-S)plot measurements.In the absence of any co-catalyst,H2 production from water splitting and Rhodamine B(RhB)decomposition in aqueous solution were carried out to evaluate the photocatalytic activities,showing that the photocatalytic performance of CdS/LTO was superior to that of pure LTO and CdS under visible light and simulated sunlight.The optimal CdS content in the CdS/LTO system was determined to be 7.5 wt%.The present results show an effective pathway to design a 1D/2D heterojunction photocatalyst in the face of overwhelming problems of energy crisis and environmental pollution. 展开更多
关键词 cadmium sulfide Lanthanum titanium oxide HETEROJUNCTION H_(2)production Dyes degradation
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