Investigation of OH radicals formation on the surface of TiO2/N photocatalyst at the presence of terephthalic acid solution. Estimation of optimal conditions

被引：56

作者：

Bubacz, K. ^{[1
]}

Kusiak-Nejman, E. ^{[1
]}

Tryba, B. ^{[1
]}

Morawski, A. W. ^{[1
]}

机构：

[1] West Pomeranian Univ Technol, Inst Chem & Environm Engn, Dept Water Technol & Environm Engn, PL-70322 Szczecin, Poland

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2013年 / 261卷

关键词：

Hydroxyl radicals; Titanium dioxide; Fluorescence technique; METHYLENE-BLUE; ORGANIC-ACIDS; AZO DYES; DEGRADATION; PHENOL; DECOMPOSITION; OXIDATION; PERFORMANCE; WATER;

D O I：

10.1016/j.jphotochem.2013.04.003

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 fluorescence technique for estimation of OH radicals formation on the surface of TiO2 photocatalyst has been reported. However in this method the linear dependence between formation of 2-hydroxyterephthalic acid (2-HTA) and irradiation time not always is obtained. In this paper the influence of TA concentration on the formation of 2-HTA at the presence of TiO2/N photocatalyst and UV irradiation is discussed. It was proved that for low concentration of TA, its transformation to 4-hydroxybenzoic acid (4-HBA) took place whereas at higher concentration of TA formation of both, 4-HBA and 2-HTA was noticed. However there is an optimal amount of TA at which the highest yield of 2-HTA could be obtained. For the excess amount of TA an inner filter effect was observed which resulted in the reducing the yield of 2-HTA formation. Two techniques, high performance liquid chromatography (HPLC) and fluorescence spectroscopy were applied for controlling formation of TA decomposition products. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：7 / 11

页数：5

共 33 条

[1] PHOTOCATALYTIC OXIDATION OF ORGANIC-ACIDS ON QUANTUM-SIZED SEMICONDUCTOR COLLOIDS [J].