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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/25338


    標題: Characterization and activity of visible-light driven TiO2 photocatalyst doped with tungsten
    作者: T. Putta
    Ming-Chun Lu
    Jin Anotai
    貢獻者: 環境資源管理系
    關鍵字: 2-chlorophenol
    photocatalysis
    titanium dioxide
    visible light
    日期: 2010-09
    上傳時間: 2012-05-31 14:49:33 (UTC+8)
    摘要: This research aimed to expand the activity of TiO2 down to the visible light region by modifying the sol-gel conditions and doping with tungsten. The optimum conditions for calcination temperature, acid type, and heating rate were 200�C, HNO3, and 1�C/min, respectively. The undoped TiO2 synthesized under these conditions could significantly absorb the visible light whereas the commercial Degussa P-25 could not. The absorptivity decreased sequentially as the wavelength increased from 400 to 700 nm. Within 6 h of 2-W blue-light illumination, 23% of 0.1 mM 2-chlorophenol was removed. The XRD result showed that the crystalline was anatase phase. The visible-light absorption property of the TiO2 became even better when doped with tungsten. At the optimum W to TiO2 ratio of 0.5%, the degradation of 0.1 mM 2-chlorophenol increased to 53% indicating a higher photocatalytic activity. Both crystalline and amorphous TiO2 could exhibit the photocatalytic activity under the visible light region.
    關聯: Water Science and Technology 62(9):p.2128-2133
    Appears in Collections:[環境資源管理系(所)] 期刊論文

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