TiO_2/石墨烯/累托石的制备及其光催化性能  

Preparation of TiO_2/Graphene/Rectorite and Its Photocatarlytic Property

作　　者：陈泓[1] 邓德明[1] 李硕[1] 黄种买[1] 

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430079

出　　处：《武汉大学学报（理学版）》2016年第1期85-91,共7页Journal of Wuhan University:Natural Science Edition

基　　金："十二五"国家科技支撑计划课题(2012BAJ21B06);武汉市科技攻关计划(201260723227)资助项目

摘　　要：通过溶胶-凝胶法制备TiO_2/石墨烯/累托石复合催化剂(TGR),并进行SEM、TEM、XRD和FT-IR表征,研究了复合催化剂制备过程中的Ti/累托石、煅烧温度等对催化性能的影响及其对RhB的降解效果.结果表明,Ti/累托石为20mmol/g,煅烧温度为450℃制备的TiO_2/石墨烯/累托石复合催化剂,在pH 7.0时,对RhB的降解率可达79.1%,3次循环实验后,催化剂的光催化性能无明显下降.该催化剂主要是通过破坏苯环对RhB进行降解.The TiO2/graphene/rectorite（TGR） composite catalysts prepared by sol-gel methodwere examined for the degradation of rhodamine B （RhB）. The catalysts were characterized by SEM, TEM, XRD, FTIR and UV-vis techniques. The performances of different catalysts on the degradation efficiency of RhB with regard to Ti/rectorite ra- tio, calcination temperature and other influencing factors were investigated. The results showed that the degradation efficiency of RhB performed the highest value （79.1%） for the TiO2/graphene/rectorite composite catalyst with a Ti/ rectorite ratio of 20 mmol/g and calcination temperature of 450 ℃ （pH 7.0）. The photocatalytic activity of the catalyst would not significantly decrease after 3 tests, which indicated that the frequency of use of the composite catalyst had no obvious effect on its photocatalytie activity. Moreover, the degradation of RhB is attributed to the promotional effect of TiO2/graphene/rectorite（TGR） composite catalyst on cracking of benzene ring.

关 键 词：二氧化钛 石墨烯 累托石 光催化 RHB 

分 类 号：O643[理学—物理化学]