Research Progress on Synthetic and Modification Strategies of CdS-based Photocatalysts

Semiconductor photocatalysis technology has attracted much attention because it can directly use solar energy to produce clean hydrogen energy. Among many semiconductor materials, CdS not only has appropriate band positions to meet the redox potential of water splitting, but also has a suitable band gap to bring about excellent visible light absorption performance. Therefore, the research on CdS-based photocatalysts has become a hot topic in recent years, and their development is a significant part of future energy and environment research. However, CdS also has problems such as rapid recombination of photogenerated carriers and serious photocorrosion. In this paper, the recent work to improve the photocatalytic efficiency and stability of CdS is reviewed. The synthesis methods and modification strategies of CdS-based semiconductor photocatalysts for H-2 evolution in solar energy are reviewed. Finally, the future prospects and challenges for the further development of CdS-based photocatalysts for H-2 generation are also discussed.