Silver vanadate nanowires: photocatalytic properties and theoretical calculations

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• 作者：Haifeng Shi ; Changping Zhou ; Chengliang Zhang
• 关键词：Oxides ; Electronic structure ; Nanowires ; Visible light ; Photocatalytic oxidation
• 刊名：Research on Chemical Intermediates
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：41
• 期：10
• 页码：7725-7737
• 全文大小：1,562 KB
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• 作者单位：Haifeng Shi (1) (2)
  Changping Zhou (1)
  Chengliang Zhang (1)
  
  1. School of Science, Jiangnan University, Wuxi, 214122, People’s Republic of China
  2. Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Physical Chemistry
  Inorganic Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1568-5675

文摘

Silver vanadate (β-AgVO₃) nanowires were synthesized by a hydrothermal method, assisted with surfactant, and evaluated for degradation of 2-propanol under visible-light irradiation. Field-emission scanning electron microscopy (FE-SEM) revealed the β-AgVO₃ nanowires were of uniform size—several micrometers long and ~20 nm in diameter. According to the diffuse reflectance spectrum of the β-AgVO₃ nanowires their energy band gap was 2.2 eV, corresponding to a wide range of visible-light absorption up to 550 nm. The electronic structure of β-AgVO₃ was calculated theoretically on the basis of density functional theory. The β-AgVO₃ nanowires catalyst had greater photocatalytic activity than commercial N-TiO₂ in the degradation of 2-propanol under visible-light irradiation. This was mainly ascribed to the narrow band gap, good crystallinity, and large surface-to-volume ratio of β-AgVO₃ nanowires. Keywords Oxides Electronic structure Nanowires Visible light Photocatalytic oxidation