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Structure and photocatalytic performance of magnetically separable titania photocatalysts for the degradation of propachlor

Paper ID Volume ID Publish Year Pages File Format Full-Text
48044 46489 2009 9 PDF Available
Title
Structure and photocatalytic performance of magnetically separable titania photocatalysts for the degradation of propachlor
Abstract

A magnetic photocatalyst was prepared by modification of TiO2 nanoparticles (Degussa P25) with nanocrystalline γ-Fe2O3 nanoparticles through a protective lining made up of two oppositely charged polyelectrolytes. As-prepared magnetically separable photocatalysts differing in γ-Fe2O3 loading (3, 8, 13, 20 and 30 wt.%) were characterized by XRD, TEM, thermal analysis, Mössbauer and magnetic measurements. The photocatalytic efficiency of the nanocomposite catalysts was evaluated using a chloroacetanilide herbicide (propachlor) in water as model compound. The primary degradation of propachlor followed pseudo-first-order kinetics according to the Langmuir–Hinshelwood model. Generally, all magnetic photocatalysts exhibit good catalytic activity towards organic pollutants, do not suffer from photodissolution and can be reused several times without any decrease in their photocatalytic activity.

Keywords
TiO2; γ-Fe2O3; Magnetically separated photocatalysts; Organic pollutants
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Structure and photocatalytic performance of magnetically separable titania photocatalysts for the degradation of propachlor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 87, Issues 3–4, 7 April 2009, Pages 181–189
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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