Effect of dye-metal complexation on photocatalytic decomposition of the dyes on TiO2 under visible irradiation

被引：11

作者：

Mahmood Tariq ^{[1
]}

Chen Chuncheng ^{[1
]}

Liu Lili ^{[1
]}

Zhao Dan ^{[1
]}

Ma Wanghong ^{[1
]}

Lin Jun ^{[2
]}

Zhao Jincai ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[2] Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2009年 / 21卷 / 02期

基金：

中国国家自然科学基金;

关键词：

photocatalysis; degradation of dye pollutants; metal ions; TiO2; LIGHT IRRADIATION; TIO2-ASSISTED PHOTODEGRADATION; PHOTOASSISTED DEGRADATION; OXIDATION; DISPERSIONS; PHASE; POLLUTANTS; ADSORPTION; PARTICLES; CATALYST;

D O I：

10.1016/S1001-0742(08)62261-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photocatalytic degradation of dyes (Acid Chrome Blue K (ACBK) and Alizarin Red (AR)) with strong complexation ability was investigated in the presence of metal ions under visible light irradiation. It was found that, at low dye-metal ratio, the photodegradation of ACBK was markedly inhibited by the addition of high oxidative potential Cu2+. However, at high dye-metal ratio, the presence of Cu2+ enhanced the photodegradation of ACBK. The negtive effect of Cu2+ on the photodegradation of AR was observed for all dyemetal ratios. The relative chemical inert Zn2+ tended to enhance the photodegradation of both anionic dyes. The mechanism underlying the different effect of Cu2+ was discussed from the different roles of surface-adsorbed and dye-coordinated Cu2+ in the photodegradation of dyes.

引用

页码：263 / 267

页数：5

共 14 条

[1] Effect of transition metal ions on the TiO2-assisted photodegradation of dyes under visible irradiation:: A probe for the interfacial electron transfer process and reaction mechanism [J].