Journal
APPLIED SURFACE SCIENCE
Volume 400, Issue -, Pages 57-63Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2016.12.072
Keywords
Oxygen vacancies; WO3 ultrathin nanosheets; Defect engineering; Electrochromism; Photocatalytic performance
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Funding
- Innovation Talents Award of Henan Province [114200510019]
- Key program of science and technology from Zhengzhou Bureau of science and technology [121PZDGG213]
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The capability of introduction of oxygen vacancies in a controlled way has emerged as the heart of modern transition metal oxide semiconductor chemistry. As chemical defects, the oxygen vacancies have been proposed as electron donors, which are prone to increase carrier density and promote charge carrier separation. Herein, we have successfully prepared 2D WO3 ultrathin nanosheets with abundant surface oxygen vacancies by a combination of facile solvothermal reaction and hydrogenation method. The resultant hydrogenated WO3 ultrathin nanosheets exhibit remarkable electrochromism and photocatalytic performances compared with the non-hydrogenated samples, mainly due to their increased oxygen vacancies, narrowed band gap coupled with fast charge transfer and enhanced adsorption of visible light. (C) 2016 Elsevier B.V. All rights reserved.
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