Journal of Materials Science and Technology, volume 121, pages 19-27
Photoinduced self-stability mechanism of CdS photocatalyst: The dependence of photocorrosion and H2-evolution performance
Publication type: Journal Article
Publication date: 2022-09-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 10.9
ISSN: 10050302
Materials Chemistry
Metals and Alloys
Ceramics and Composites
Polymers and Plastics
Mechanical Engineering
Mechanics of Materials
Abstract
• The lattice Cd 2+ reduction during CdS photocorrosion was carefully investigated. • The isolated Cd nanoparticles were produced on CdS surface in Na 2 S-Na 2 SO 3 system. • A metallic Cd layer is uniformly coated on CdS surface in the lactic acid system. • A photoinduced self-stability mechanism of CdS photocatalyst has been proposed. CdS photocorrosion is one of the most important factors that greatly affect the photocatalytic H 2 -production rate and long-time stability. However, the reported works about CdS photocorrosion are mainly focused on the surface oxidation by photogenerated holes, while the possible reduction of lattice Cd 2+ by photogenerated electrons is usually ignored. In this work, the lattice Cd 2+ reduction by photogenerated electrons during CdS photocorrosion were carefully investigated to reveal its potential effect on the microstructure change and photocatalytic H 2 -production performance of CdS photocatalyst based on the two typical Na 2 S-Na 2 SO 3 and lactic acid H 2 -evolution systems. It was found that many isolated metallic Cd nanoparticles (5–50 nm) were produced on the CdS surface in the Na 2 S-Na 2 SO 3 system, causing its serious destroy of CdS surface and a gradually decreased photocatalytic activity, while only a metallic Cd layer (2-3 nm) is homogeneously coated on the CdS surface in the lactic acid system, leading to an increased H 2 -evolution rate. In fact, once a certain amount of metallic Cd was produced on the CdS surface, the resulting CdS-Cd composites can present a stable photocatalytic H 2 -production activity and excellent stability for the final CdS-Cd photocatalysts. Hence, a photoinduced self-stability mechanism of CdS photocatalyst has been proposed, namely, the spontaneously produced metallic Cd contributes to the transformation of unstable CdS into stable CdS-Cd structure, with the simultaneous realization of final stable H 2 -evolution performance.
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Chen Y. et al. Photoinduced self-stability mechanism of CdS photocatalyst: The dependence of photocorrosion and H2-evolution performance // Journal of Materials Science and Technology. 2022. Vol. 121. pp. 19-27.
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Chen Y., Zhong W., Chen F., Wang P., Fan J., Yu H. Photoinduced self-stability mechanism of CdS photocatalyst: The dependence of photocorrosion and H2-evolution performance // Journal of Materials Science and Technology. 2022. Vol. 121. pp. 19-27.
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TY - JOUR
DO - 10.1016/j.jmst.2021.12.051
UR - https://doi.org/10.1016/j.jmst.2021.12.051
TI - Photoinduced self-stability mechanism of CdS photocatalyst: The dependence of photocorrosion and H2-evolution performance
T2 - Journal of Materials Science and Technology
AU - Chen, Yuxiao
AU - Zhong, W
AU - Chen, Feng
AU - Wang, Ping
AU - Fan, Jiajie
AU - Yu, Huogen
PY - 2022
DA - 2022/09/01 00:00:00
PB - Springer Nature
SP - 19-27
VL - 121
SN - 1005-0302
ER -
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@article{2022_Chen,
author = {Yuxiao Chen and W Zhong and Feng Chen and Ping Wang and Jiajie Fan and Huogen Yu},
title = {Photoinduced self-stability mechanism of CdS photocatalyst: The dependence of photocorrosion and H2-evolution performance},
journal = {Journal of Materials Science and Technology},
year = {2022},
volume = {121},
publisher = {Springer Nature},
month = {sep},
url = {https://doi.org/10.1016/j.jmst.2021.12.051},
pages = {19--27},
doi = {10.1016/j.jmst.2021.12.051}
}