钛酸四丁酯水解制备TiO_2半导体光催化剂研究

研究了钛酸四丁酯水解制备TiO2 粉末的两大影响因素R值 (R是水和钛酸四丁酯的摩尔比 )和烧结温度 .通过光催化氧化五氯苯酚钠实验 ,结合对催化剂晶型结构、比表面积的表征分析 ,综合评价所制备的催化剂 .实验结果表明 ,当R =10 0、烧结温度为 6 5 0℃、烧结时间为 1h ,钛酸四丁酯水解所制备的TiO2 半导体光催化剂催化活性和使用寿命均比较理想 .从晶型结构分析 ,当催化剂中锐钛矿和金红石按一定比例共存时 ,其催化活性较单一金红石或锐钛矿高 .实验认为锐钛矿与金红石的最佳比约为 2∶1

Study on photocatalyst TiO_2 prepared by tetrabutyl titanate hydrolysis

TiO2 photocatalyst was prepared by tetrabutyl tiannate hydrolysis under various conditions,and characterised by X－ray and BET.The impact of calcinateing temperatures and R (moval ratio of water and tetrabutyl tianate) were examined.Sodium pentachlorphenolate (PCP－Na) solution was used to examine the photocatalytic reaction of TiO2.The results indicated that the optimal condition of preparation catalyst is R:100 and calcinateing temperature:650℃,and the photocatalytic activity is related with crastal structures,when anatase∶rutile is 2∶1,the photocalytic activity is the highest.