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Oxygen Vacancy Regulation on Tungsten Oxides with Specific Exposed Facets for Enhanced Visible-light-driven Photocatalytic Oxidation

Abstract

Introduced oxygen vacancy on WO3 with specific surface facets was prepared through facile solvothermal treatment and different cooling methods. We demonstrated that the density of oxygen defects could be regulated by different methods and speculated that oxygen vacancy with appropriate concentration range could promote photocatalytic activity through suppressing the recombination of photo-induced carriers. The specific exposed facets with higher oxidation efficiency were prepared by solvothermal reaction. WO3-A treated by air cooling exhibits a best photocatalytic oxygen evolution rate with 500 umol/g/h using AgNO3 as sacrifice agent under visible light (λ>400 nm) without any co-catalysts, which is about 2 times than WO3-N without oxygen defects. This strategy through the different cooling method to regulate oxygen vacancies concentration on tungsten oxides would contribute to the design of other high efficiency photocatalysts.

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Publication details

The article was received on 17 Nov 2017, accepted on 10 Jan 2018 and first published on 10 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR08590G
Citation: Nanoscale, 2018, Accepted Manuscript
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    Oxygen Vacancy Regulation on Tungsten Oxides with Specific Exposed Facets for Enhanced Visible-light-driven Photocatalytic Oxidation

    J. Meng, Q. Lin, T. Chen, X. Wei, J. Li and Z. Zhang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR08590G

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