期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 114, 期 -, 页码 240-248出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.12.006
关键词
BiOCl; Carboxylic acid; Oxygen vacancy; Radicals; Photocatalytic
资金
- National Natural Science Foundation of China [51602281]
- China Postdoctoral Science Foundation [2017M621832]
- Science and Technology Innovation Cultivation Fund project of Yangzhou University [2019CXJ092]
- Soochow University [SDGC2124]
- Yangzhou University High-end Talent Support Program
- Qinglan Project of Jiangsu Universities
In this study, a high-efficiency photocatalytic BiOCl material with visible light absorption range was successfully synthesized using a one-pot molecular self-assembly and particle recrystallization method. The hierarchical structure and oxygen vacancies in the material improved its photocatalytic performance and enabled effective degradation of organic pollutants.
In this work, a high-efficiency photocatalytic BiOCl material with a visible light absorption range was successfully prepared by one-pot molecular self-assembly and particle recrystallization method at room temperature. In the process of crystal growth, tartaric acid, as a structure control agent, gradually transforms the stacked two-dimensional nano-sheet-like BiOCl into a hierarchical structure composed of petal-like nano-sheets through hydrogen bonding. Besides, the acid etching of organic carboxylic acid on the crystal surface increases the number of micropores and mesopores, thereby the reaction interface. The thiourea (TU) molecules adsorbed on the BiOCl surface with a strong electronic effect introduce oxygen vacancies (OVs) under the condition of low oxygen content. The synergistic effect of hierarchical structure and OVs reduces the recombination of photogenerated carriers, but absorbs more O-2 and OH- to generate a large number of superoxide radicals (center dot O-2(-)) and hydroxyl radicals (center dot OH) effectively. The photocatalytic performance of the synthesized BiOCl material has been significantly improved, and it can effectively degrade 94.15% of rhodamine B (RhB) within 20 min. Furthermore, 90.95% of tetracycline (TC), 93.76% of ciprofloxacin (CIP), and 85.53% of methyl orange (MO) can be removed in 80 min. Therefore, our work provides an effective method for preparing BiOCl with visible light catalytic activity, which, of course, can be used to treat and repair actual environmental problems under mild conditions. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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