On the photocatalytic properties of nano-TiO2 with dual-phase structure for aqueous methyl-red dye degradation

被引：6

作者：

Zhang, Dongfang ^{[1
]}

机构：

[1] Huazhong Agr Univ, Coll Sci, Wuhan 430070, Peoples R China

来源：

HIGH ENERGY CHEMISTRY | 2012年 / 46卷 / 03期

关键词：

ORGANIC-DYES; TIO2; SEMICONDUCTOR; OXIDATION; ANATASE; PARTICLES; SURFACES;

D O I：

10.1134/S0018143912030149

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Heterogeneous photocatalytic removal of methyl-red (MR) dye from liquid phase was done using mixed-phase nanocrystalline TiO2 for enhancement its photochemical decomposition capabilities. The mixed-phase nanocrystalline TiO2 was characterized using various techniques to investigate its physicochemical properties. The photocatalytic efficiency of mixed-phase nanocrystalline titania was explored by monitoring the photochemical decay of aqueous MR dye. The results showed that the as-prepared mixed-phase nanocrystalline TiO2 was excellent for degradation of MR molecule, and the impurity of rutile form increases the photochemical activity by a by a factor of 3. The reaction mechanism was proposed and the results demonstrate that the photocatalytic oxidation reaction followed a pseudo-first-order kinetics.

引用

页码：206 / 211

页数：6

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