TiO_2负载管状高岭土光催化剂的制备及其表征  

Preparation and characterization of TiO_2 supported tubular kaolinite

作　　者：邓中文[1] 郑玉婴[1] 龙海[2] 杜琦峰[1] 张由芳[1] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108 [2]福州大学化学化工学院,福建福州350108

出　　处：《功能材料》2013年第6期874-877,882,共5页Journal of Functional Materials

基　　金：福建省教育厅科技资助项目(JK2011004);高校产学合作科技重大资助项目(2012H6008)

摘　　要：以高岭土/甲醇插层复合物为前驱体,与十六烷基三甲基氯化铵反应制备了管状高岭土,并以此为载体,采用溶胶-凝胶法,制备了TiO2/管状高岭土光催化剂。利用X射线粉末衍射仪、傅里叶变换红外光谱仪和场发射扫描电镜分别对高岭土及其插层复合物的微观形貌与结构进行了表征。紫外光谱分析表明,与纯TiO2相比复合催化剂对光吸收利用率明显提高,并在可见光区有明显吸收。催化降解甲基橙实验表明,500W汞灯辐照30min后,复合光催化剂对甲基橙的降解效率较纯TiO2提高了30%。Tubular kaolinite as a support was obtained by the exfoliation and rolling of cetyltrimethylammonium chloride replacement reaction with kaolin/methanol intercalation compound. TiO2 doped tubular kaolinite cata- lysts were prepared by sol-gel method in aqueous solution of nitric acid. The structural and morphological of ka- olinite and its intercalation compounds were investigated by XRD, FT-IR and FE-SEM. Compared with pure TiO2, composite catalyst has obvious enhancement in the utilization ratio of light absorption, especially in the visible range. The photocatalyst efficiency of TiO2 doped tubular kaolinite has increased by 30 G on the degrada tion of methyl orange in aqueous solution, after irradiation for 30min under 500W mercury lamp.

关 键 词：插层 管状高岭土 溶胶-凝胶法 载体 光催化 

分 类 号：TB332[一般工业技术—材料科学与工程]