Zhang Lina, Li Xiaodong, Xu Haifeng, Zhang Wei, Yin Xiaotong, Tian Yuxin, Wang Qiushi, Ma Jinwen
College of Physical Science and Technology, Bohai University, 121013 Jinzhou, Liaoning, People's Republic of China.
Institute of Ocean Research, Bohai University, 121013 Jinzhou, Liaoning, People's Republic of China.
Dalton Trans. 2024 Jul 30;53(30):12710-12719. doi: 10.1039/d4dt01349b.
Constructing an S-scheme system with highly active catalysts is a significant approach for improving the separation of photoinduced carriers to solve the related environmental aggravation. In this study, a well-designed S-scheme AgVO/CaInS photocatalyst was synthesized for water purification by growing CaInS nanocrystals on AgVO nanorod surfaces. The optimized AgVO/CaInS heterostructure demonstrates an enhanced photocatalytic efficiency (94.1%) toward tetracycline hydrochloride (TCH) degradation compared with bare AgVO (42.6%) and CaInS (81.6%). The significant enhancement of photocatalytic activity is attributed to the S-scheme charge transfer mechanism in the AgVO/CaInS heterostructure, which effectively directs photogenerated charge migration, boosts charge transfer, and preserves the high redox capacity of photoexcited electrons and holes on different active sites. This study is expected to offer insights into strategically designing and preparing S-scheme heterojunction photocatalysts to improve water purification.
构建具有高活性催化剂的S型体系是改善光生载流子分离以解决相关环境恶化问题的重要途径。在本研究中，通过在AgVO纳米棒表面生长CaInS纳米晶体，合成了一种设计良好的用于水净化的S型AgVO/CaInS光催化剂。与裸AgVO（42.6%）和CaInS（81.6%）相比，优化后的AgVO/CaInS异质结构对盐酸四环素（TCH）降解表现出更高的光催化效率（94.1%）。光催化活性的显著提高归因于AgVO/CaInS异质结构中的S型电荷转移机制，该机制有效地引导光生电荷迁移，促进电荷转移，并在不同活性位点上保持光激发电子和空穴的高氧化还原能力。本研究有望为战略性设计和制备S型异质结光催化剂以改善水净化提供见解。
