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Motivating visible light photocatalytic activity of ultrathin Bi2O2(OH)xCl2-x solid solution with exposed {001} facets by the co-effect of oxygen vacancy and OH replacement

Abstract

Modification of semiconductor with multi-strategies is an effective and promising way to boost the visible light induced photocatalytic performance of photocatalyst. Herein, we report an effective strategy to boost the visible light photocatalytic activity of ultrathin Bi2O2(OH)xCl2-x solid solution with exposed {001} facet by adjusting the concentrations of oxygen vacancy and OH in it. The ultrathin Bi2O2(OH)xCl2-x was sythesized by replacing Cl in BiOCl with OH and the oxygen vacancy was induced by using EG as part of solvothermal reaction solution. The thickness of nanosheet and content of OH in solid solution could be controlled by simply adjusting pH value of reaction solution. The Bi2O2(OH)xCl2-x solid solution with oxygen vacancy and suitable OH replacement presented superior visible light photocatalytic activity for degradation of antibiotic, which was ca. 4 and 2 times higher than those of BiOCl and Bi2O2(OH)Cl both with oxygen vacancy modification, respectively. This outstanding performance was owing to the enhancement of visible light absorption, molecular oxygen motivation and charge carriers’ separation by the co-effect of oxygen vacancy and OH replacement, revealed by photoelectrochemical test and charge density difference simulation, etc. This work might provide a new promising strategy to motivate visible light photocatalytic performance of photocatalysts.

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Supplementary files

Publication details

The article was received on 01 Jun 2018, accepted on 12 Jul 2018 and first published on 13 Jul 2018


Article type: Paper
DOI: 10.1039/C8NR04469D
Citation: Nanoscale, 2018, Accepted Manuscript
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    Motivating visible light photocatalytic activity of ultrathin Bi2O2(OH)xCl2-x solid solution with exposed {001} facets by the co-effect of oxygen vacancy and OH replacement

    X. Wu, K. Li, Y. Li and G. Zhang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR04469D

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