| Al-TiO_2介孔材料对溴甲酚绿可见光降解的动力学 |
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| 引用本文： | 刘少友,唐文华,曹晖,龙步明.Al-TiO_2介孔材料对溴甲酚绿可见光降解的动力学[J].凯里学院学报,2010,28(3):28-32. |
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| 作者姓名： | 刘少友 唐文华 曹晖 龙步明 |
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| 作者单位： | 凯里学院应用化学研究所,贵州,凯里,556011 |
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| 基金项目： | 贵州省教育厅自然科学重点资助课题，广西区教育厅研究生科研创新项目 |
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| 摘 要： | 用固相反应法制得的铝掺杂二氧化钛（Al-TiO2）介孔材料研究了该材料在可见光下对溴甲酚绿的光降解性能及作用因素对降解动力学的影响,探讨了可见光催化的作用机制.结果表明,锐钛矿型的Al-TiO2介孔材料与P25-TiO2粉体对溴甲酚绿溶液的可见光降解行为均遵循准一级反应动力学规律.在298K,pH=6.4、催化剂的用量为1g/L、溴甲酚绿的初始浓度为0.03582mmol/L时,Al-TiO2介孔材料的反应速率常数是P25-TiO2粉体5.2倍;当催化剂的用量为4g/L时,能获得最大的反应速率常数0.09677min-1;溴甲酚绿的初始浓度越低,反应速率常数越大,降解越彻底;温度每升高3℃,Al-TiO2介孔材料的可见光降解反应速率常数依次提高1倍,高于P25-TiO2粉体的增大倍数;在298～304K范围内,Al-TiO2介孔材料对溴甲酚绿可见光降解以空穴氧化为主,其表观活化能比P25-TiO2粉体降低23.7%.
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| 关 键 词： | 铝掺杂二氧化钛 溴甲酚绿 可见光降解 动力学 |
Kinetics of bromocresol green photodegradation with visible-light irradiation on the Al-doped TiO_2 mesoporous material |
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| LIU Shao-you,TANG Wen-hua,CAO Hui,LONG Bu-ming.Kinetics of bromocresol green photodegradation with visible-light irradiation on the Al-doped TiO_2 mesoporous material[J].Journal of Southeast Guizhou National Teachers College,2010,28(3):28-32. |
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| Authors: | LIU Shao-you TANG Wen-hua CAO Hui LONG Bu-ming |
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| Institution: | LIU+Shao-you,TANG+Wen-hua,CAO+Hui,LONG+Bu-ming(Institute+of+Applied+Chemistry,Kaili+University,Kaili,Guizhou,556011,China) |
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| Abstract: | The photodegradation properties and effects of function ingredients on degradation kinetics for bromocresol green were investigated using the Al-doped TiO2 mesoporous material prepared by solid-state reaction. And the proposal mechanism of visible light on the catalytic material was discussed. The results show that the rule of pseudo-first-order reaction is found for the visible light degradation of bromocresol green over Al-TiO2 mesoporous material with anatase phase or P25 dioxide titanium surface. At 298... |
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| Keywords: | Al-doped TiO2 bromocresol green visible-light degradation kinetics |
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