| Influence of Calcination Temperature on TiO2 Nanotubes＇ Catalysis for TiO2/UV/O3 in Landfill Leachate Solution |
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| 引用本文： | 潘留明,季民,王秀朵,赵乐军.Influence of Calcination Temperature on TiO2 Nanotubes＇ Catalysis for TiO2/UV/O3 in Landfill Leachate Solution[J].天津大学学报(英文版),2010,16(3):179-186. |
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| 作者姓名： | 潘留明 季民 王秀朵 赵乐军 |
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| 作者单位： | School of Environmental Science and Engineering;Tianjin University;Tianjin Municipal Engineering Design and Research Institute; |
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| 基金项目： | Supported by Tianjin Science and Technology Development Plan Project (No.06YFGZSH06700) |
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| 摘 要： | The influence of calcination temperature on TiO2 nanotubes＇ catalysis for TiO2/UV/03 was investigated. TiO2 nanotubes （TNTs） were prepared via the sol-gel method and calcined at 300--700 ℃, which were labeled as TNTs-300, TNTs-400, TNTs-500, TNTs-600 and TNTs-700, respectively. TNTs were characterized by transmission electron microscopy （TEM） and X-ray diffraction （XRD）. It is found that TNTs calcined at 400 ℃ showed the best thermal stability. When the calcination temperature increased from 400 ℃ to 700 ℃, the special structure of tubes was destroyed and gradually converted into nanorods and/or particles. The transformation from anatase to rutile occurred at 600 ℃, and the rutile phase was enhanced when the calcination temperature was increased to over 600 ℃. The calcina- tion temperature＇s influence on TNTs＇ adsorption activity for for TiO2/UV/O3 was investigated in landfill leachate solution chemical oxygen demand （COD） and catalytic activity In landfill leachate solution, the adsorption activity of COD decreased in the reduced order of TNTs-300, TNTs-400, TNTs-500, TNTs-600 and TNTs-700. In photocatalytic ozonation, TNTs-400 showed the best catalytic activity while TNTs-700 exhibited the worst. In other three processes, the COD removal of TNTs-300/UV/O3 was higher than those of TNTs-500/UV/O3 and TNTs-600/UV/O3 in the first 20 rain, and then became close to those of the latter two in the following 40 rain. Compared with TNTs-300 and TNTs- 400, TNTs-600 had the best anti-fouling activity, while TNTs-500 and TNTs-700 had lower anti-fouling activity than the former three. In photocatalytic ozonation, the calcination temperature of 400 ℃ was appropriate when TNTs were obtained at the synthesis temperature of 105 ℃.
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| 关 键 词： | TiO2纳米管 垃圾填埋场 焙烧温度 渗滤液 催化 |
| 收稿时间： | 7 January 2010 |
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