光电流
乙二醇
材料科学
光催化
氧气
辐照
纳米材料
光化学
催化作用
空位缺陷
化学工程
纳米技术
光电子学
化学
结晶学
有机化学
物理
核物理学
工程类
作者
Yin Peng,Peng-Fei Kan,Qian Zhang,Ying‐Hua Zhou
出处
期刊:Catalysts
[MDPI AG]
日期:2019-06-21
卷期号:9 (6): 558-558
被引量:32
摘要
2D nanomaterials, with unique structural and electronic features, had been demonstrated as excellent photocatalysts, whose catalytic properties could be tunable with surface defect engineering. In this work, few-layer BiOBr nanosheets with oxygen vacancies (BiOBr-Ov) have been fabricated by a simple solvothermal reaction with the help of ethylene glycol. The obtained BiOBr-Ov exhibited the superior photocatalytic performance with a complete reduction of Cr(VI) (20 mg/L) within 12 min by visible light irradiation. Moreover, Cr(VI) with a high concentration (such as 30 mg/L) only requires 2 min to be photoreduced completely under solar light irradiation. The enhanced photocatalytic performance is contributed to the existence of oxygen vacancies. It has been proved by the results of electrochemical impedance and photocurrent that oxygen vacancies can effectively suppress recombination of photogenerated carriers.
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