纳米TiO_2/蛋白土复合材料的制备与表征  

Preparation and Characterization of Nano-TiO_2/Opal Composite Materials

作　　者：刘超[1] 郑水林[1] 宋贝[1] 王彤彤[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《人工晶体学报》2013年第4期695-700,共6页Journal of Synthetic Crystals

摘　　要：为了解决纳米TiO2在使用过程中分散性差、难以回收等缺点,将纳米TiO2负载在酸浸蛋白土表面,提高光催化效率。以酸浸蛋白土为载体,TiCl4为前驱体,采用水解沉淀法制备了纳米TiO2/蛋白土复合材料。采用XRD、TEM等方法对复合材料性能进行了表征,并进行了复合材料的光催化降解甲醛实验研究。结果表明负载在蛋白土表面的TiO2晶型为锐钛型,晶粒粒度为5～20 nm。对甲醛降解实验研究结果表明,所制备的蛋白土负载纳米TiO2复合材料具有良好的光催化降解性能,其24 h对甲醛的降解去除率可以达到90%以上。The nano-TiO2 was deposited on the the acid leaching opal to solve the shortcomings of nano- TiO2 poor recycling and dispefing during use, make the photocatalytic efficiency improved. Using the acid leaching opal as the carrier and the TiCl4 as the precursor, the nano-TiO2 composite materials were prepared by a hydrolysis precipitation process. The composite material was characterized by XRD, TEM The degradation of formaldehyde of the composite materials was studied. The experimental results show that the nano-TiO2 particals were uniformly loaded on the surface of opal and the crystal of TiO2 is anatase, whose grain size is 5-20 nm. Through the experimental results of the degradation of formaldehyde, the photocatalytic activity of obtained samples was high and the degradation rate of formaldehyde can achieve 90% within 24 h.

关 键 词：蛋白土 TIO2 水解沉淀 光催化 

分 类 号：TD985[矿业工程—选矿]