文章基本信息

标题：Photocatalytic Study of Two Azo Dye Derivatives, Ponceau Bs and Reactive Blue 160 in Aqueous Suspension of TiO2: Adsorption Isotherm and Decolorization Kinetics
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作者：Niyaz A. Mir ; A. Khan ; A. A. Dar 等
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：2
页码：9333
出版社：S&S Publications
摘要：This paper deals with the photocatalyzed decolorization kinetics of two azo dye derivatives, Ponceau BS andReactive Blue 160 under a variety of conditions in aqueous suspension of TiO2 using UV light. The efficiency ofdifferent TiO2 photocatalysts such as PC500-Milennium, UV100-Hombikat and P25-Degussa were compared for thedecolorization of both dyes. Photocatalytic, photolytic, and adsorption experiments were performed, showing thatadsorption of both dyes on TiO2-UV100 is appreciable compared to that on P25 and favorable by the Langmuirapproach. The effects of various parameters such as catalyst loading, initial pH, substrate concentration and electronacceptors such as H2O2, KBrO3 on the decolorization have been investigated. Under the operating conditions of thisstudy, the photocatalytic decolorization of dyes under study followed pseudo first-order kinetics. The photodecolorization kinetics was discussed in terms of Langmuir-Hinshelwood kinetic model. The decolorization efficiencywas found to be efficient in acidic medium which gradually slowed down in the alkaline medium due to the effect ofcharge repulsion.
关键词：Adsorption; Decolorization; Photocatalysis; Ponceau BS; Reactive Blue 160; TiO2