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Photocatalytic activity of AgBr/TiO2 in water under simulated sunlight irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
48294 46500 2008 7 PDF Available
Title
Photocatalytic activity of AgBr/TiO2 in water under simulated sunlight irradiation
Abstract

In this paper, the synthesis of AgBr/TiO2 catalyst and the photocatalytic activity in water under simulated sunlight irradiation were studied. The influence of AgBr content in catalyst and the incident light intensity on the degradation of methyl orange (MO) was investigated. It was found that the initial reaction rate constant was dependent on the relative levels of AgBr content and incident light intensity, ranging between 0.008 min−1 and 0.023 min−1. At higher levels of AgBr content (>9 wt%), MO degradation was exclusively dependent on the incident light intensity, which implied that the excessive AgBr in catalyst had negligible effect on catalyst activity. However, at lower AgBr contents, the reaction rate increased with the increase of incident light intensity, and eventually reached a plateau level, indicating that the degradation of MO was limited by AgBr content. The results from powder X-ray diffraction (XRD) analysis showed that more than 80% of AgBr remained intact after 14 h of irradiation, although metallic silver was also detected.

Keywords
Photocatalysis; AgBr/TiO2 catalyst; Simulated sunlight irradiation; Advanced oxidation technology (AOT); Methyl orange
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 79, Issue 4, 8 March 2008, Pages 334–340
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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