| 磷钨酸修饰的纳米TiO_2薄膜的制备及光催化性能 |
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| 引用本文： | 刘士荣,毛明富,倪忠斌,陈明清.磷钨酸修饰的纳米TiO_2薄膜的制备及光催化性能[J].功能材料,2010,41(2). |
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| 作者姓名： | 刘士荣 毛明富 倪忠斌 陈明清 |
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| 作者单位： | 江南大学,化学与材料工程学院,江苏,无锡,214000 |
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| 基金项目： | 国家自然科学基金资助项目(20671043) |
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| 摘 要： | 以钛酸四丁酯为前驱物,乙酸为溶剂,用溶胶-凝胶法制备了磷钨酸修饰的纳米TiO2薄膜(PW12/TiO2)。通过FT-IR、UV-Vis、XRD、BET、SEM进行了表征。结果表明,磷钨酸修饰的纳米TiO2具有锐钛矿晶型和较大的比表面积,磷钨酸在TiO2中仍保持Keggin结构,并抑制了粒子烧结过程中的长大。研究了PW12/TiO2薄膜在对氯苯酚光降解中的催化活性。当磷钨酸与TiO2的摩尔比为0.02∶1,240℃焙烧,PW12/TiO2薄膜的光催化降解反应遵循L-H机理,一级反应速率常数为0.016min-1。磷钨酸与TiO2在光催化反应中有明显的协同作用。
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| 关 键 词： | 溶胶-凝胶法 光催化 TiO2薄膜 磷钨酸 |
Preparation of nano TiO_2 film modified with phosphatotungstic acid and photocatalytic performance |
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| LIU Shi-rong,MAO Ming-fu,NI Zhong-bin,CHEN Ming-qing.Preparation of nano TiO_2 film modified with phosphatotungstic acid and photocatalytic performance[J].Journal of Functional Materials,2010,41(2). |
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| Authors: | LIU Shi-rong MAO Ming-fu NI Zhong-bin CHEN Ming-qing |
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| Affiliation: | School of Chemical & Material Engineering;Jiangnan University;Wuxi 214036;China |
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| Abstract: | The nano TiO_2 film modified with phosphatotungstic acid(PW12/TiO_2)was prepared by sol-gel method using tetrabutyl titanate(TBOT) as a precursor and acetic acid as solvent,and was characterized by FTIR,UV-Vis,XRD,BET and SEM.The result indicates that the TiO_2 nanoparticles has the anatase structure and high specific surface.Phosphatotungstic acid still keeps Keggin structure in TiO_2 and inhibites the growth of crystal grain.The photocatalysis degradation of p-chlorophnol with PW12/TiO_2 film was investig... |
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| Keywords: | sol-gel photocatalysis TiO_2 film phosphatotungstic acid |
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