Studies on the photodegradation of Rhodamine dyes on nanometer-sized zinc oxide

被引：108

作者：

Yu, DZ ^{[1
]}

Cai, RX ^{[1
]}

Liu, ZH ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2004年 / 60卷 / 07期

基金：

中国国家自然科学基金;

关键词：

nanometer-sized ZnO; rhodamine dyes; photodegradation; dynamic molecular spectra;

D O I：

10.1016/j.saa.2003.09.003

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The nanometer-sized ZnO was prepared through the sol-gel method. Its average particle diameter, deter-mined by TEM, was 20-30 run. The specific surface area was determined to be 22 m(2) g(-1) by BET. The photodegradation mechanism of Rhodamine dyes on nanometer-sized ZnO was studied by dynamic molecular spectra, and the results showed that the photodegradation of Rhodamine dyes obeyed the rules of a pseudo first-order kinetic reaction. The rate constant k of the degradation of Rhodamine B (RB) and butyl-Rhodamine (BR) were 0.0128 and 0.0154min(-1), respectively, and the half period t(1/2) were 60 and 52min, respectively. The photodegradation reaction conditions were optimized. After intermixing with silver, the photodegradation efficiency was greatly improved. A life-span test showed that nanometer-sized ZnO had a long life-span. (C) 2003 Elsevier B.V. All rights reserved.

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页码：1617 / 1624

页数：8

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