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文章摘要
溶胶-凝胶法制备TiO2/MCM-41负载型光催化剂及其性能表征
Preparation and characterization of TiO2/MCM-41 loaded photocatalyst by sol-gel method
投稿时间:2011-02-24  
DOI:
中文关键词: 溶胶-凝胶法  TiO2-MCM-41  光催化剂
英文关键词: sol-gel method  TiO2-MCM-41  photocatalyst
基金项目:武汉市重大科技计划资助项目(200861113462).
作者单位E-mail
刘 红 武汉科技大学资源与环境工程学院,湖北 武汉,430081 liuhong64@126.com 
石 飞 武汉科技大学资源与环境工程学院,湖北 武汉,430081  
李杨薇 武汉科技大学资源与环境工程学院,湖北 武汉,430081  
周 娟 武汉科技大学资源与环境工程学院,湖北 武汉,430081  
宋卫坤 中国水利水电科学研究院水利研究所,北京,100048  
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中文摘要:
      以钛酸丁酯为钛源、MCM-41分子筛为载体,采用溶胶-凝胶法制备TiO2/MCM-41负载型光催化剂,并通过XRD、BET、TEM、XPS对最佳条件下制备的光催化剂进行表征。结果表明,所制光催化剂是一种具有均匀规则孔道结构的介孔材料,其粉体比表面积高达358.8m2/g;经700℃煅烧,催化剂主要晶相为锐钛矿相。光催化剂中的Ti以+4价存在,TiO2表面羟基氧所占比率为38.0%。以水中甲基橙为模拟污染物,TiO2/MCM-41光催化剂对浓度为25mg/L的甲基橙溶液降解0.5h后,其脱色率为93.7%。
英文摘要:
      A loaded photocatalyst, TiO2/MCM-41, was prepared by the sol-gel method using titanate butyl acetate as the titanium source and MCM-41molecular sieve as the carrier. The optimal photocatalyst was characterized by XRD, BET, TEM and XPS. The results show that the photocatalyst is a mesoporous material with the surface area at 358.8m2/g and regular structure. At the calcination temperature of 700℃, the main crystalline phase in photocatalyst is still anatase phase. XPS analysis indicates that titanium exhibits +4valence, and the percentage of hydroxyl oxygen on TiO2surface is 38.0%. With 25mg/L aqueous solution of methyl orange, the decolorization rate of methyl orange reaches 93.7% under 0.5h UV irradiation.
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