Photocatalytic decolorization of rhodamine B by immobilized TiO2 onto silicone sealant

被引：58

作者：

Kim, DS

Park, YS ^{[1
]}

机构：

[1] Daegu Univ, Dept Hlth & Environm, Gyeongbuk 712714, South Korea

[2] Catholic Univ Daegu, Dept Environm Sci, Gyeongbuk 712702, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2006年 / 116卷 / 02期

关键词：

photocatalytic decolorization; UV/TiO2; dye; immobilization; adsorption;

D O I：

10.1016/j.cej.2005.10.013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 [工学]; 0830 [环境科学与工程];

摘要：

The photocatalytic performance of immobilized TiO2, supported on silicone sealant was evaluated using the photocatalytic oxidation of rhodamine B (RhB) under weak illumination conditions. Three 8 W germicidal lamps were used as the light source and the reactor volume was 1.71. The optimum dosage of immobilized photocatalyst was 210.7 g/l (TiO2, weight percentage: 15%). The initial decolorization rate constants of RhB in an aqueous solution were determined in the presence or absence of immobilized TiO2, and UV irradiation in order to study each decolorization effect due to adsorption onto the immobilized TiO2, direct photolysis by UV irradiation and photocatalytic decolorization. The order of initial decolorization rate constant was photocatalytic oxidation > adsorption > photolysis. The initial decolorization rate constant of the RhB by the immobilized TiO2 was higher than that of the powder TiO2. The used immobilized photocatalyst retained a constant photocatalytic activity. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：133 / 137

页数：5

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