超声辅助介孔纳米TiO_2光催化剂制备与光催化性能  

Preparation and Photocatalytic Properties of Mesoporous Nano TiO_2 Photocatalyst with Ultrasound Assisted

作　　者：杨在志[1] 傅小明[1] 许新宇 朱良怀 周炎 张臻 YANG Zai-zhi;FU Xiao-ming;XU Xin-yu;ZHU Liang-huai;ZHOU Yan;ZHANG Zhen(Department of Material Engineering,Suqian College,Suqian 223800,China)

机构地区：[1]宿迁学院材料工程系,宿迁223800

出　　处：《人工晶体学报》2018年第11期2389-2392,共4页Journal of Synthetic Crystals

基　　金：宿迁学院自然科学基金重点项目(2016KY03);宿迁市科技计划项目(Z201740)

摘　　要：以钛酸丁酯为钛源,在高能超声的辅助作用下,通过溶胶-凝胶法合成了纳米TiO_2光催化剂,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和紫外-可见光光度计(UV-Vis)等对光催剂进行检测与表征。结果表明:高能超声的空化作用细化了纳米TiO_2的显微结构,形成了分散有序的介孔结构。当超声频率为45 k Hz时,纳米TiO_2的晶粒尺寸约为12 nm,介孔孔道尺寸为10 nm,对有机污染物的有效降解率为92%。The nano TiO 2 photocatalyst was synthesized by sol-gel method with the assistance of high energy ultrasound and tetrabutyl titanate as the titanium source.The microstructure and properties of photocatalyst was characterized by X-ray diffraction,scanning electron microscope(SEM),transmission electron microscope(TEM),Ultraviolet-Visible(UV-Vis).The results show that the microstructure of nano TiO 2 is refined by the cavitation of high energy ultrasound,and the dispersed and ordered mesoporous structure is formed.When the ultrasonic frequency is 45 kHz,the size of the nanocrystalline TiO 2 is about 12 nm,the size of mesoporous channel is 10 nm,the effective degradation rate of the organic pollutants is 92%.

关 键 词：高能超声 溶胶-凝胶法 介孔结构 光催化剂 

分 类 号：TB34[一般工业技术—材料科学与工程] O643.3[理学—物理化学]