| TiO_2光催化降解直接耐酸大红的动力学研究 |
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| 引用本文： | 李春燕,黄雪峰,汪永辉.TiO_2光催化降解直接耐酸大红的动力学研究[J].环境科学与管理,2008,33(10). |
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| 作者姓名： | 李春燕 黄雪峰 汪永辉 |
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| 作者单位： | 1. 东华大学,环境科学与工程学院,上海,201620
2. 安徽理工大学,资源与环境工程系,安徽,淮南,232001 |
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| 摘 要： | 以TiO2为催化剂,直接耐酸大红4BS为模型污染物,对暗吸附实验和不同光强下的光催化反应进行了研究。实验结果表明,TiO2对4BS有很强的吸附作用,其原因主要与染料的结构特性和催化剂表面物种有关,由于高吸附作用导致光催化反应为零级动力学;反应速率r随起始浓度C0的增加变化不大,随着光强的增强,反应速率逐渐加快,但当光强大于1.48 mw/cm2,变化较小达到光饱和;通过分析推测光催化反应途径主要是羟基自由基.OH与吸附在催化剂表面有机物的反应。
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| 关 键 词： | 光催化 TiO2动力学 |
Kinetic Study on Photocatalytic Degradation of Direct -red 4BS by TiO2 |
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| Li Chunyan,Huang Xuefeng,Wang Yonghui.Kinetic Study on Photocatalytic Degradation of Direct -red 4BS by TiO2[J].Environmental Science and Management,2008,33(10). |
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| Authors: | Li Chunyan Huang Xuefeng Wang Yonghui |
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| Institution: | 1(1.College of Environmental Science & Engineering; Donghua University; Shanghai 201620 China; 2.Department of Resources and Environmental Engineering; Anhui University of Science and Technology; Huainan 232001; China); |
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| Abstract: | In order to clarify the photocatalytic mechanism,photocatalytic degradation kinetic parameters were experimentally investigated under different light intensity with commercial TiO2 as the catalyst and direct-red 4BS as the model compound.To account for the results of dark adsorption,significant adsorption occurred on the surface of catalysts,the main reason was that 4BS possessed of-SO-3 groups and TiO2 surface existed TiOH+2,because of significant adsorption the photocatalytic degradation would observed ze... |
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| Keywords: | photocatalysis TiO2 and kinetics |
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