硅胶负载溴掺杂纳米TiO2的制备与光催化性能研究  

PREPARATION AND PHOTOCATALYTIC PERFORMANCE OF BROMINE-DOPED TiO_2 LOADED ON SiO_2

作　　者：樊丽霞[1] 王海增[1] 孙宝维[1] 于艳伟[1] 孙金香[1] 

机构地区：[1]海洋化学理论与工程技术教育部重点实验室,中国海洋大学化学化工学院,青岛266100

出　　处：《太阳能学报》2011年第10期1445-1449,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(20477041)

摘　　要：利用水热法制备了SiO_2负载型溴掺杂纳米TiO_2光催化剂(BTS),利用XRD、BET和UV-Vis DRS等测试手段对其进行表征,以苯酚的光催化降解为模型反应,考察了其光催化活性。结果表明:700℃焙烧、钛与硅的摩尔比为3:1时,BTS具有最佳光催化活性。TiO_2以锐钛矿相存在,晶体平均晶粒尺寸为45.5nm,负载后催化剂的比表面积为112.8m^2/g,BTS对苯酚的降解率从纯TiO_2的27.1%提高到85.6%。A novel bromine-doped TiO2 photocatalyst loaded on SiO2 （BTS） was obtained by hydrothermal method. The BTS was characterized by XRD, BET and UV-Vis absorbance spectra. The photocatalytic activity was evaluated choosing the photatalysis decomposition phenol as the reaction model. The result showed that after calcination at 700℃, the BTS has the best photocatalytic activity when the ratio of titanium and silicon was 3： 1. The BTS is in anatase phase. After loading the average particle size and the BET surface of the catalyst reaches 45.5nm and 112.8m2^/g, respectively. The BTS has higher catalytic activities than that of pure TiO2, and its degradation rate for phenol is increased from 27.1% to 85.6%.

关 键 词：二氧化钛 二氧化硅 溴掺杂 负载 光催化活性 

分 类 号：O643[理学—物理化学]