Wenya Zhang, Yongjian Xu, Yuning Wang, Xiaoyu Wu*, Xuanyuan Liu, Fang Guo, Qianhui Wu*, Chunsheng Li* and Ming Chen*,
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引用次数: 0
Abstract
Construction of a heterojunction is one of the promising methods for obtaining the required photocatalysts with enhanced photocatalytic activity. In this study, the ternary heterostructures of ZnS/CdS/Zn-Cd-MOF were synthesized using a semiderivatization of bimetallic MOF strategy. The photocatalytic hydrogen evolution activity of ZnS/CdS/Zn-Cd-MOF under visible light irradiation was investigated. Its maximum hydrogen production rate is 27.65 mmol g–1 h–1, which is 32 times that of pure ZnS nanoparticles and 13 times that of pure CdS nanoparticles. Mechanism studies using UV–visible DRS, photoluminescence, surface photovoltage, Mott–Schottky diagrams, and electron EPR reveal that the double Z-scheme heterostructure is formed between ZnS, CdS nanoparticles, and Zn-Cd-MOF, which provides a directional carrier migration channel, further promotes electron transfer, and effectively separates photogenerated carriers, which significantly improves photocatalytic activity and stability. This study proposes a reasonable double Z-scheme heterojunction photocatalyst with high efficiency for hydrogen production.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.