| Mo掺杂纳米TiO_2光降解甲基橙的动力学模型 |
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| 引用本文： | 李峰,郑经堂,胡燕,卞贺.Mo掺杂纳米TiO_2光降解甲基橙的动力学模型[J].滨州学院学报,2010,26(6). |
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| 作者姓名： | 李峰 郑经堂 胡燕 卞贺 |
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| 摘 要： | 通过溶胶-凝胶法制备了Mo不同掺杂量的纳米TiO2光催化剂,进行了UV-Vis分析,并在紫外光源下对降解甲基橙光催化活性进行了测定.最后建立L-H模型和GM(1,1)模型,考查了Mo/TiO2对甲基橙的降解动力学,并对模型进行了比较.结果表明,纳米TiO2当煅烧温度为500℃时,Mo的最佳掺杂量为0.05 mol%.L-H模型对有些Mo掺杂纳米TiO2光催化降解甲基橙存在偏差,且Andrews型稳健回归优于最小二乘算法的模拟结果.而GM(1,1)模型对Mo掺杂纳米TiO2光催化降解甲基橙能进行很好的实验模拟.
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| 关 键 词： | 溶胶-凝胶法 纳米TiO2 光降解 动力学 |
Study on Dynamic Model of Methyl Orange Photodegradation Reaction by Mo-doped TiO2 |
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| LI Feng,ZHENG Jing-tang,HU Yan,BIAN He.Study on Dynamic Model of Methyl Orange Photodegradation Reaction by Mo-doped TiO2[J].Journal of Binzhou University,2010,26(6). |
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| Authors: | LI Feng ZHENG Jing-tang HU Yan BIAN He |
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| Abstract: | The Modoped TiO2 photocatalysts were prepared by doping molybdenum ion into TiO2 structure in a sol-gel process.The catalyst samples were then characterized with ultraviolet-visible diffuse reflectance spectra(DRS).Their photacatalytic activities were studied by photodegradation methyl orange in water under UV light irradiation.And L H model and GM(1,1) model were established to study dynamics of the methyl orange photodegradation using different Mo TiO2 catalysts.The three models were also compared.The experiments demonstrated that an optimum doping of Mo at 0.05 %mol achieved the highest MBT photodegradation rate when the temperature of calcination reaches to 500 ℃.The result also showed that there were errors when methyl orange photodegradation reaction was simulated by L-H model,and the results of Andrews robust regression were better than that of least squares approach.But by GM(1,1) model,it was demonstrated that the calculated results had a good coincidence with the experimental ones. |
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| Keywords: | sol-gel method nano-TiO2 photodegradation dynamics |
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