Photocatalytic activity of bauxite-tailings supported nano-TiO_2

作     者：卢清华 胡岳华 王梦 

作者机构：School of Resources Processing and BioengineeringCentral South University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2010年第17卷第4期

页      面：755-759页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Project(2005CB623701) supported by the National Key Basic Research Program of China 

主　　题：TiO2 bauxite-tailings phenol photocatalytic activity 

摘      要：TiO2/bauxite-tailings （TiO2/BTs） composites were prepared via a chemical liquid deposition method and characterized by X-ray diffractometry （XRD）, scanning electronic microscopy （SEM） and N2 adsorption analysis. The photocatalytic performance of TiO2/BTs composites was evaluated with UV-Vis spectrophotometer following the changes of phenol concentration under different illumination time. Effects of the calcination temperature, the pH and the cycles on the photocatalytic activity of TiO2/BTs composites were investigated. The composites calcined at 500 and 600 ℃ exhibit the best photocatalytic performance, and the phenol degradation ratios reacting for 40 and 160 rain reach 35% and 78% respectively under the same conditions, higher than those of 29% and 76% of the Degussa P25（TiO2）. The ability of TiO2/BTs500 （BTs500 represents bauxite-tailings calcined at 500 ℃） composites to degrade phenol increases with decreasing pH.