Investigation of Photocatalytic Activity of Nano-Sized TiO2 with the Presence of Various Inorganic Anions

被引：8

作者：

Zhang, Yun ^{[1
,2
]}

Ji, Xiaobo ^{[2
]}

Li, Hong ^{[3
]}

Chen, Jianying ^{[1
]}

Wang, Yuan ^{[1
]}

机构：

[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China

[2] Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England

[3] NERC, Ctr Ecol & Hydrol Oxford, Oxford OX1 3SR, England

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2009年 / 9卷 / 06期

关键词：

Nano-Sized TiO2; Inorganic Anion; Photocatalytic Activity; Methyl Orange; TITANIUM-DIOXIDE; AQUEOUS SUSPENSION; PHOTOLYSIS; DETOXIFICATION; BICARBONATE; DEGRADATION; OXIDATION; POWDER; IONS;

D O I：

10.1166/jnn.2009.NS43

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of various anions on the photocatalytic activity of nano-sized TiO2 was investigated in a methyl orange solution. The photocatalytic activity of the TiO2 nanoparticles was significantly affected in the presence of SO42-, CO32-, NO3- and Cl-. Among the tested ions, Cl- was most effective anion in changing the photocatalytic activity. Addition of Cl- (0.05 M) decreased the methyl orange photodegradation rate to only one quarter of that when TiO2 was used alone. It was also demonstrated that the effects of these inions, on the rate of photocatalytic activity of the nanoparticles, were concentration dependent. There was a negative correlation between the concentrations of NO3- and Cl- and the methyl orange degradation rate by TiO2 However, at low concentrations, CO32- and SO42- enhanced the photocatalytic activity; while at the higher concentrations, these two anions inhibited the photocatalytic activity of TiO2

引用

页码：3639 / 3643

页数：5

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