INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2015
·
IF 3.313
Yuanchen Hong,Penghui Shi,Peifu Wang,Weifeng Yao
CdS were synthesised in situ on graphene oxide (GO) using a simple solvothermal method . GO in the prepared powders was then photoreduced into RGO to form the CdS/GO composites. The samples were characterised by using the X-ray diffraction spectra (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), fluorescence spectrum and Raman spectrum . The prepared CdS/RGO exhibited much higher activity for H 2 evolution than CdS or CdS mechanically loaded with GO under visible light irradiation (>420 nm). The improved photocatalyst performance of CdS/RGO was attributed to enhancement of the connection between CdS and RGO sheets, which accelerates the effect of the separation of photoinduced electrons and holes by transferring the photoinduced electron to RGO sheets.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
CRYSTENGCOMM
·
2014
·Vol. 16
·期 40
·9501-9505
·
IF 3.858
Yejun Zhang,Shuling Shen,Qiangbin Wang
High quality Ag2S–CdS heteronanostructures were prepared via a facile one-pot method, which is based on the co-thermal decomposition of two single-source precursors of (C2H5)2NCS2Ag and ((C2H5)2NCS2)2Cd in a mixture of oleylamine and oleic acid. Ag2S–CdS heteronanostructures with spherical and matchstick-like structures can be easily obtained in high yields by careful control of the growth kinetics. It was found that oleic acid is conducive to the formation of spherical Ag2S–CdS heteronanostructures and oleylamine helps towards the formation of matchstick-like Ag2S–CdS heteronanostructures. Variable-temperature powder X-ray diffraction studies confirmed the heteroepitaxial growth of CdS on tiny Ag2S nanocrystals, in which the Ag2S nanocrystal plays a catalytic role in the epitaxial growth of the CdS segments.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xiangjun Liu,Jingjing Ma,Shuai Zhang,Guo-Wei Guan,Qing-Yuan Yang,Junqi Wang
Harvesting solar energy to drive highly efficient photocatalytic conversion of renewable biomass to value-added chemicals and H 2, is a green and promising strategy to acquire clean H 2 with high energy density. In this study, CdS nanoparticles/Ti 3 C 2 T x nanosheets (Ti 3 C 2 T x /CdS composites) photocatalysts were prepared by a hydrothermal strategy. With an optimized Ti 3 C 2 T x loading of 0.8 wt%, the Ti 3 C 2 T x /CdS composites exhibited a significant enhancement in the photocatalytic H 2 evolution reaction with long-term stability, reaching 20,427 μmol·g −1 ·h −1 , compared to the pristine CdS (1,999 μmol·g −1 ·h −1 ). The Ti 3 C 2 T x /CdS-0.8 reflects appropriate electronic band structure and excellent conductivity, resulting in efficiently generation and migration of photoinduced electrons. In addition, the apparent quantum yield of Ti 3 C 2 T x /CdS-0.8 was 9.4% at 420 nm, higher than that of pristine CdS (1.2%). Superior results (7,164 μmol·h −1 ·g −1 ) were also achieved in the conversion of raw biomass to H 2 under natural sunlight. Achieving solar-driven H 2 production from biomass represents a significant step forward in contributing to sustainable and clean energy practices.
研究领域:
材料科学
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能源化学
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环境科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 48
·73282-73291
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IF 5.19
Sun Yubing,Xiao Jingting,Huang Xinshui,Mei Peng,Wang Huihui
CdS-based composites as the highly efficient photocatalyst have been extensively investigated in recent years due to the suitable band gap and high photocatalytic efficiency. In this study, the effect of various factors (pH, U(VI) concentration, contents, and types of photocatalyst) on photocatalytic reduction of U(VI) by MoS 2 /CdS composite was investigated. The optimized experimental conditions (e.g., pH 7.0, 20 mg/g U(VI), and 1.0 g/L photocatalyst) was obtained by batch techniques. Approximately 97.5% of U(VI) was photo-catalytically reduced into U(IV) by 2.5 wt% MoS 2 /CdS composite within 15 min. After 5 cycles, 2.5 wt% MoS 2 /CdS composite still exhibited the high removal efficiency of U(VI) under 50-min irradiation, indicating the good stability. The photo-reduction mechanism of U(VI) on MoS 2 /CdS composite was attributed to the O − 2 radicals by quenching experiments, ESR, and XPS analysis. The findings indicate that CdS-based catalyst has a great potential for the photocatalytic reduction of uranyl in actual environmental remediation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xiangyu Meng,Junyi Yang,Shiming Xu,Chenchen Zhang,Baochun Ma,Yong Ding
Molybdenum based compounds, such as MoC x , MoSe 2 , MoS 2 MoP x , MoO x and their derivatives, have been considered as the alternative catalysts for platinum (Pt) whether in electrocatalytic or photocatalytic hydrogen evolution reaction (HER). This means molybdenum based compounds have great application potential in solving the energy crisis and environmental pollution. Herein, for the first time, the unexplored Mo 2 B x (x = 1 or 4) were investigated as the active components in a visible-light driven photocatalytic hydrogen production system. Experimental results demonstrate that they both exhibit excellent hydrogen evolution activities when combined with CdS or organic photosensitizers. Additionally, for the same kind of light-harvesting material, the photocatalytic HER activity of Mo 2 B 4 is obviously better than that of Mo 2 B. This clearly indicates the photocatalytic activities of them are affected by the content of electron deficient atom boron (B) in Mo 2 B x samples and exhibits a strong B dependence in photocatalytic HER. The reason for this B dependency is studied in detail by photo/electrochemical methods and optical characterizations in this work, where it is essentially caused by the difference in the electron transfer (ET) rates between light-harvesting material and Mo 2 B x samples and just manifested as B dependency. Additionally, the relation between photocatalysis and electrocatalysis in HER is discussed.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Shen-wei Bai,Hui Mei,Ming-gang Zhang,Yue-kai Yan,Lai-fei Cheng,Li-tong Zhang
In this article, a 3D photocatalytic support with different Poisson’s ratio was used for the first time to control the photocatalytic production rate of hydrogen. It was created by a stereo-lithography method, and the support with the most negative Poisson’s ratio got the best result. The Poisson’s ratio of the 3D structure influences the rate of hydrogen production , and it is important for the photocatalyst supports to be porous for light to penetrate into them. A series of Ce doped CdS photocatalysts were produced and immobilized on 3D multicellular Al 2 O 3 supports. By changing the proportion of Ce 3+ doped into the CdS photocatalysts 1 % of Ce 3+ exhibited optimal hydrogen production, which was 222.9 % compared to that of the pure CdS. Using the 3D photocatalytic support with different Poisson’s ratio, the photocatalytic production rate of hydrogen increased by 128 %.
研究领域:
材料科学
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能源化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yingqi Chen,Yufei Cheng,Junfeng Zhao,Wenwan Zhang,Jianhua Gao,Hui Miao,Xiaoyun Hu
Antimony sulfide (Sb 2 S 3 ) is a relatively abundant and environmentally friendly emerging photovoltaic material, which has been gradually applied in solar cells and photocatalysis. It has high light absorption capacity, but it suffers many deep-level defects and is prone to recombination of electron-hole pairs within itself. Here, by constructing the Sb 2 S 3 /CdIn 2 S 4 S-scheme heterojunction, we avoided the problem that electrons and holes cannot be separated and transported effectively due to many Sb 2 S 3 defects (more recombination centers), and improved its application in the field of photoelectrochemical water splitting. Meanwhile, in order to further improve the performance of Sb 2 S 3 /CdIn 2 S 4 photoelectrode, we introduced CdS energy platform between Sb 2 S 3 and CdIn 2 S 4 to form a Sb 2 S 3 /CdS/CdIn 2 S 4 cascaded S-scheme heterojunction. Compared with Sb 2 S 3 monomer, Sb 2 S 3 /CdS/CdIn 2 S 4 had higher absorbance intensity, IPCE value, ABPE value, and lower charge transfer resistance. In addition, the photocurrent density of the Sb 2 S 3 /CdS/CdIn 2 S 4 photoelectrode was about 4.20 mA/cm 2 (1.23 V vs. RHE), which was 1.3 times higher than that of the Sb 2 S 3 /CdIn 2 S 4 photoelectrode (3.29 mA/cm 2 ) and 3.2 times higher than that of monomer Sb 2 S 3 photoelectrode (1.32 mA/cm 2 ). This method offers new prospects for optimizing the performance of antimony chalcogenides photoelectrodes for photoelectrochemical water splitting.
研究领域:
材料科学
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能源科学
·
光催化
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Tianyi Zhang,Da Teng,Jiaojiao Zhang,Zihui Meng,Lili Qiu
The unique periodic structure of photonic crystals demonstrates an effective slow photon effect that enhances the interaction between light and matter. This study designed and prepared MOF photonic crystal beads, and significantly improved the photocatalytic efficiency by utilizing the slow light effect. Utilizing microfluidic technology, ZIF-8 was self-assembled to form photonic crystal beads (PCB-Z) to enhance adsorption properties and light absorption. The surface of PCB-Z is modified with CdS to form a heterostructure (PCB-ZC), which widens the absorption spectrum, reduces the carrier recombination rate, and increases the specific surface area, while the photocurrent intensity of PCB-ZC is about 1.8 and 29 times that of CdS and PCB-Z. Under the combined effect of photonic crystal structure, ZIF-8/CdS heterojunction and slow photon effect, the degradation rate of Rhodamine B by PCB-ZC was 15.22 times higher than the disordered ZIF-8 powder, and the photocatalytic performance was significantly improved. The dominant role of holes in Rhodamine B degradation was confirmed by free radical trapping experiments and EPR tests. This research confirms that MOF-based photonic crystals can be assembled into periodic structures to enhance adsorption properties and light absorption, which provides a new paradigm for the development of MOF-based photocatalysts.
研究领域:
材料科学
·
光化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Zizheng Ai,Gang Zhao,Yueyao Zhong,Yongliang Shao,Baibiao Huang,Yongzhong Wu,Xiaopeng Hao
CdS is a photocatalyst known for its desirable bandgap and availability but it is limited by photocorrosion and inefficiency issues in practical applications. According to band engineering theory, regulating the width of bonding region that exists between cubic phase and hexagonal phase, we design a suitable phase junction and achieve effective separation of electron-hole pairs. Thus, the problems caused by photocorrosion and phase exclusion can be resolved. The optimal photocatalytic activity of the prepared material is 4.9 mmol h −1 g −1 with 41.5% quantum efficiency at the wavelength of 420 nm, which is 60 times higher than that of the initial samples (cubic or hexagonal phase), and keeps high photocatalytic stability. This novel construction approach can be useful in designing ideal band structures and matching the phase bandgap of other binary sulfides.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jia Li,Wentao Liu,Yang Li,Zhi Liu,Yang Liu
A series of hierarchical flower-like CdS/carbon quantum dots/NiAl-LDH (CCL) photocatalyst have been successfully prepared to achieve efficient conversion of CO 2 -to-CO via a simple yet effective hydrothermal method. In the CCL, interspersed-CQDs not only increase the number of reactive sites but also reduce inner electronic impedance with the assistance of light reflecting-scattering effect. This significantly improves electron migration efficiency and inhibits the recombination of photoinduced electron-holes pairs. Without any sacrificial agent or photosensitizer, the sample of CCL-1 exhibits the highest CO evolution rate of 7.04 μmol·g −1 ·h −1 in water under simulated sunlight illumination with a large specific surface area (129.15 m 2 g −1 ) and an appropriate CQDs content of 15.2 wt%, which is 12.8- and 11.2-fold higher than those of pristine LDH, pure CdS, and many previously reported LDH-based counterparts. A type-Ⅱ interfacial charge transfer mechanism is proposed, where electrons migrate rapidly from CdS to LDH with highly-interspersed CQDs as unhindered electron conduction bridges. The present work outlines a simple and controllable LDH-based heterojunction, which give rise to superior photocatalytic activity for CO 2 photoreduction.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2014
·
IF 2.354
Yonghai Song,Mei Huang,Dan Luo,Dandan Zhong,Haoqing Hou,Fugang Xu
In this study, we investigated the interaction between EcoRI and CdS QDs modified with different functional groups as well as the conformational changes of EcoRI in the process. MUD capped (CdS–OH QDs) and UDT capped (CdS–CH 3 QDs) CdS QDs were separately prepared and used to react with EcoRI, respectively. The interaction was characterized by various spectroscopic techniques including UV–vis absorption, fluorescence and Fourier transform infrared (FTIR) spectroscopy, together with electrophoresis methods. The strength of interaction for EcoRI with CdS–OH QDs and CdS–CH 3 QDs was evaluated and analysed. Relevant thermodynamic parameters such as Δ H , Δ G and Δ S were calculated and a static quenching interaction process was proposed. The conformational change of EcoRI interacted with CdS–OH QDs or CdS–CH 3 QDs was also measured and compared. Finally agarose electrophoresis assay was performed and revealed that the enzyme activity of EcoRI was somewhat conserved after interaction with CdS QDs. This study contributed to a better understanding of protein-NPs interaction and created a framework for applications of nanomaterial-biomolecule conjugation in some fields such as nanobiology and nanomedicine.
研究领域:
纳米生物技术
·
生物化学
·
分子生物学
·
纳米医学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 25
·4451-4458
·
IF 3.545
Wenxuan Ma,Shuhua Hao,Lei Zhang,Baoyi Lv,Gang Zhao,Jinzhao Huang,Xijin Xu
CdS is widely used in the field of photocatalysis owing to its excellent photocatalytic H2 evolution (PHE) activity, but the photocatalytic stability of CdS is inhibited because of the drawback of photocorrosion. Under light, the introduction of WS2 cocatalysts induces the growth of layered CdS on the WS2 nanosheets. Through the photocatalytic activity measurement, after adding ultrathin WS2 nanosheets, the amount of H2 released can reach 139.15 mmol g−1 after 7 h, which is 11.3 times higher than that of pure CdS nanoparticles. Furthermore, these composites illustrate excellent light absorption performance in the near-infrared region. A heterojunction is formed between WS2 and CdS under light, which greatly promotes the mobility of interface carriers and limits the recombination of photogenerated carriers. The hydrogen evolution output remains stable after 42 h, and the photocorrosion problem is effectively suppressed. In this work, we provide an effective and simple method to improve photocatalytic activity and stability, which is beneficial to the practical development of photocatalysis.
研究领域:
材料科学
·
光催化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）