Photocatalytic activity of bauxite-tailings supported nano-TiO2

被引：4
作者：
Lu Qing-hua [1 ]
Hu Yue-hua [1 ]
Wang Meng [1 ]
机构：
[1] Cent S Univ, Sch Resources Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2010年 / 17卷 / 04期
关键词：
TiO2; bauxite-tailings; phenol; photocatalytic activity; TIO2; FILMS; DEGRADATION; DEPOSITION; PARTICLES;
D O I：
10.1007/s11771-010-0552-y
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
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 N-2 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 A degrees C exhibit the best photocatalytic performance, and the phenol degradation ratios reacting for 40 and 160 min 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 A degrees C) composites to degrade phenol increases with decreasing pH.
引用
收藏
页码：755 / 759
页数：5
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