期刊
NANOMATERIALS
卷 9, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/nano9121657
关键词
ZnS; sulfur-vacancy defect; N-doped carbon; visible-light harvesting
类别
资金
- Sichuan Science and Technology Program [2018JY0451]
- Education Department of Sichuan Province [17CZ0019, 17ZA0218]
In this work, N-doped carbon-coated ZnS with a sulfur-vacancy defect (ZnS@N-C) was performed for the visible-light-driven photodegradation of tetracycline hydrochloride (TCH). The obtained ZnS@N-C exhibited enhanced photocatalytic activity compared with ZnS for TCH removal. Among these ZnS@N-C composites, ZnS@N-C-3 with N-doped content of 3.01% (100 nm) presented the best visible-light photocatalytic activity and superior long-term photocatalytic stability after five cycle times for TCH removal in the visible light region. This may be ascribed to the interface between the N-doped carbon shell and ZnS with a sulfur-vacancy defect for efficient charge transfer and the restrained recombination of charge carriers. Electron spin resonance (ESR) results indicate that the O-2 radical plays a crucial role in the enhanced photocatalytic activity of ZnS@N-C-3.
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