| 不同吸附类型有机物在TiO2纳米管阵列电极表面的光电催化性能和反应机制 |
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| 引用本文： | 李迪,陈红冲,李金花,周保学,蔡伟民.不同吸附类型有机物在TiO2纳米管阵列电极表面的光电催化性能和反应机制[J].物理化学学报,2011,27(9):2153-2159. |
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| 作者姓名： | 李迪 陈红冲 李金花 周保学 蔡伟民 |
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| 作者单位： | 1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;
2. Key Laboratory of Thin Film and Microfabrication Technology, Ministry of Education, Shanghai 200240, P. R. China |
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| 基金项目： | 国家高技术研究发展计划项目(863) |
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| 摘 要： | 利用有机物在薄层反应器中发生的耗竭氧化反应,研究了弱吸附型的葡萄糖和强吸附型的邻苯二甲酸氢钾在TiO2纳米管阵列(TNA)电极表面的光电催化反应性能和反应机制.研究表明,光电催化反应电流-时间(I-t)曲线的变化趋势能够很好地反映有机物在TNA电极表面的反应性能.对于弱吸附型的葡萄糖,由于其在TNA电极表面吸附能力弱,从溶液本体被吸附至电极表面较慢,致使葡萄糖在高浓度光催化反应时出现I-t曲线瞬时升高然后迅速下降,再呈现缓慢下降的变化趋势.对于强吸附型的邻苯二甲酸氢钾,其吸附性强且难降解,因而在电极表面总是存在着大量的邻苯二甲酸氢钾,导致溶液中邻苯二甲酸氢钾浓度升高时,光电催化反应的I-t曲线在瞬时升高,然后依然持续升高,之后才呈缓慢下降的变化趋势.本文还对有机物的吸附类型、吸附系数、反应机制等进行了分析.研究表明,利用薄层反应器的耗竭氧化反应,有助于深入了解有机物在电极表面的反应过程及其微观机制.
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| 关 键 词： | 葡萄糖 邻苯二甲酸氢钾 TiO2纳米管阵列电极 薄层反应池 |
| 收稿时间： | 2011-03-28 |
| 修稿时间： | 2011-07-07 |
Photoelectrocatalytic Performance and Reaction Mechanism of Different Organics upon Adsorption on a TiO2 Nanotube Array Electrode |
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| LI Di,CHEN Hong-Chong,LI Jin-Hua,ZHOU Bao-Xue,CAI Wei-Min.Photoelectrocatalytic Performance and Reaction Mechanism of Different Organics upon Adsorption on a TiO2 Nanotube Array Electrode[J].Acta Physico-Chimica Sinica,2011,27(9):2153-2159. |
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| Authors: | LI Di CHEN Hong-Chong LI Jin-Hua ZHOU Bao-Xue CAI Wei-Min |
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| Institution: | 1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;
2. Key Laboratory of Thin Film and Microfabrication Technology, Ministry of Education, Shanghai 200240, P. R. China |
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| Abstract: | The kinetics and mechanism of the photoelectrocatalytic degradation of glucose with weak adsorption and potassium hydrogen phthalate with strong adsorption on a self-organized and highly ordered TiO2 nanotube array(TNA) were investigated using a thin layer reactor in which the organic compounds were completely and quickly oxidized.The photogenerated current-time(I-t) profiles were used to analyze the microprocesses of the photoelectrochemical catalytic degradation on the TNA electrode.For glucose the I-t cu... |
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| Keywords: | Glucose potassium hydrogen phthalate TiO2 nanotube array electrode Thin-layer cell |
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