BiOBr/Cd0.805Zn0.195S Nanocomposite with S-scheme Heterojunction for Efficient and Stable Photocatalytic Hydrogen Evolution Without Co-catalysts
Aoyun Meng , Juan Li , Qianqian Cao , Zhenhua Li , Wen Li , Zhen Li , Jinfeng Zhang , Junwei Fu
Chemical Research in Chinese Universities ›› 2025, Vol. 41 ›› Issue (4) : 790 -798.
BiOBr/Cd0.805Zn0.195S Nanocomposite with S-scheme Heterojunction for Efficient and Stable Photocatalytic Hydrogen Evolution Without Co-catalysts
Due to the issue of energy depletion, photocatalytic hydrogen evolution has gained significant attention in recent years as a sustainable energy conversion technology. However, traditional single photocatalytic materials often face problems of low catalytic activity and stability. To address this challenge, this study proposes novel BiOBr/Cd0.805Zn0.195S (BO/CZS) nanocomposite materials, which effectively enhance photocatalytic hydrogen evolution efficiency through an S-scheme heterojunction design. Under visible light without the use of a co-catalyst, pure BO shows almost no photocatalytic hydrogen evolution activity, while CZS exhibits a hydrogen evolution rate of 4.0 mmol·g‒1·h‒1. The hydrogen evolution rate of the 2% BO loading composite material (2-BO/CZS) significantly increases to 5.9 mmol·g‒1·h‒1. Stability tests show that the 2-BO/CZS composite material retains 97% of its initial activity after four cycles. X-Ray photoelectron spectroscopy (XPS) analysis and differential charge density analysis confirm that the heterojunction mechanism of this composite material follows the S-scheme charge transfer mechanism, which effectively promotes the separation and migration of photogenerated charge carriers, reduces charge recombination, and significantly improves catalytic efficiency. This system demonstrates outstanding stability and efficiency in hydrogen evolution, making it a promising candidate material for sustainable hydrogen production applications.
Photocatalytic / Hydrogen / Nanocomposite / S-scheme
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Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH
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