溶胶-凝胶法制备纳米二氧化钛及其光催化性能  

Preparation and Photocatalytic Performance of Nano-Sized Titanium Dioxide by Sol-Gel Method

作　　者：帅树乙 李婧 张连辉 何婷 陈璐[1] 黎阳[1] Shuai Shuyi;Li Jing;Zhang Lianhui;He Ting;Chen Lu;Li Yang(School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang,Guizhou 550025,China)

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550025

出　　处：《化学世界》2022年第4期216-221,共6页Chemical World

基　　金：贵阳市科技计划(No.筑科合同[2020]-4-2);贵州省科技计划(No.黔科合基础[2020]1Y206)资助项目。

摘　　要：以钛酸四丁酯为钛源,采用溶胶-凝胶法合成了三种纳米TiO_(2)粉末,采用X衍射仪、氮气等温吸附仪、红外光谱仪、综合热分析仪、紫外可见光分光光度计对样品进行了表征。结果表明,三种纳米TiO_(2)粉末均为锐钛晶型,晶粒尺寸为20 nm,比表面积均>80 m^(2)/g。紫外光线照射120 min时,三种粉末对罗丹明B溶液的光催化降解率均>90.0%,照射时间达180 min时,降解率均>99.5%,而商品级P25纳米TiO_(2)粉末对罗丹明B溶液的降解率较低,120和180 min时的光催化降解率仅为37.1%和69.0%。Three kinds of nano-TiO_(2)powders were successfully synthesized by sol-gel method with tetrabutyl titanate as titanium source.Their properties were characterized by X-ray diffraction,nitrogen isothermal adsorption,infra-red spectroscopy,thermal analysis and UV/Vis.The results showed that the crystal phase of obtained nano-TiO_(2)powders are all anatase structure.The crystal size and specific surface area are about 20 nm and 80 m^(2)/g,respectively.Under UV,the powders have excellent photocatalytic degradation performance.The degradation rate of rhodamine B solution was above 90.0% after 120 min,and over 99.5% after 180 min.However,the result of commercial grade P25 nano-TiO_(2)powder for rhodamine B solution was very low,and the photocatalytic degradation rate at 120 and 180 min was only about 37.1% and 69.0%,respectively.

关 键 词：溶胶-凝胶法 纳米TiO_(2) 罗丹明B 光催化降解 

分 类 号：TB34[一般工业技术—材料科学与工程]