期刊
NANOMATERIALS
卷 8, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/nano8070553
关键词
oxygen vacancies; WO3; nanosheets; photocatalysis; plasmon resonance absorption; photodegradation
类别
资金
- National Nature Science Foundation of China [21271048]
- Natural Science Foundation of China [11747074]
- Guangdong province science and technology plan project public welfare fund and ability construction project [2016A010103041, 2017A010103025]
- Doctoral Program of Lingnan Normal University [ZL1503]
- China Spark Program [2015GA780058]
Oxygen vacancy defects play an important role in improving the light-capturing and photocatalytic activity of tungsten trioxide (WO3). However, the hydrogen treatment method that is commonly used to introduce oxygen vacancies is expensive and dangerous. Therefore, the introduction and control of oxygen vacancy defects in WO3 remains a challenge. Here, we demonstrated that oxygen vacancies could be successfully introduced into WO3, while using a facile method through low temperature annealing in alcohol. The obtained WO3, samples with optimal oxygen vacancies showed strong absorption of light, extending from the ultraviolet to the visible and near-infrared regions, and exhibits strong plasmon resonance from 400-1200 nm peaking at approximately 800 nm. When compared to pristine WO3, the photocatalytic activity of WO3, was greatly improved in the ultraviolet and visible regions. This study provides a simple and efficient method to generate oxygen vacancies in WO3 for photocatalysis, which may be applied in the photoelectrochemical, electrochromic, and photochromic fields. Because oxygen vacancy is a common characteristic of metal oxides, the findings that are presented herein may be extended to other metal oxides.
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