Photochemical transformations of sodium anthracene-1-sulfonate in oxygen-saturated aqueous titanium dioxide suspensions

被引：12

作者：

Blazková, A ^{[1
]}

Mezeiová, B ^{[1
]}

Brezová, V ^{[1
]}

Ceppan, M ^{[1
]}

Jancovicová, V ^{[1
]}

机构：

[1] Slovak Univ Technol Bratislava, Fac Chem Technol, SK-81237 Bratislava, Slovakia

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2000年 / 153卷 / 1-2期

关键词：

sodium anthracene-1-sulfonate; phototransformation; photocatalysis; TiO2; EPR spin trapping;

D O I：

10.1016/S1381-1169(99)00312-X

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：

The decomposition of sodium anthracene-1-sulfonate (AN1S) by irradiation (lambda > 300 nm) was investigated in oxygen-saturated aqueous solutions and TiO2 suspensions. The concentration decrease of AN1S during exposure follows the formal first-order kinetics. The formation of phthalic and salicylic acids was monitored by high performance liquid chromatography (HPLC) in both photosystems. Additionally, the formation of alizarin during irradiation in the presence of TiO2 was confirmed. The effect of experimental conditions (initial AN1S concentration, pH value, TiO2 concentration) on the formal initial rate of AN1S photodegradation was studied in details. In situ EPR spin trapping experiments in TiO2 suspensions confirmed the competitive reaction of photogenerated hydroxyl radicals between 5,5-dimethyl-1-pyrroline N-oxide (DMPO) spin trap and AN1S. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：129 / 137

页数：9

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