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Bismuth oxychloride-mediated and laser-induced efficient reduction of Cr(VI) in aqueous suspensions

Paper ID Volume ID Publish Year Pages File Format Full-Text
40660 45861 2012 5 PDF Available
Title
Bismuth oxychloride-mediated and laser-induced efficient reduction of Cr(VI) in aqueous suspensions
Abstract

The reduction of Cr(VI) was investigated in aqueous suspensions of BiOCl and Degussa P25 using a 355 nm laser radiation and conventional lamp. BiOCl showed better photocatalytic activity than Degussa P25 and ∼95% Cr(VI) was reduced within short time (30 min) of laser exposure in presence of BiOCl without the use of any additive. Effects of critical parameters, such as laser energy, catalyst amount and chromium concentration on the photocatalytic reduction process were investigated. The photocatalytic removal of metal was fitted to first-order kinetic and reaction rate was estimated. Structural and compositional stability of BiOCl before and after photocatalytic reaction were determined by XRD, Raman, FT-IR, TGA/DSC analyses.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (66 K)Download as PowerPoint slideHighlights► Studied a novel combination of laser light and BiOCl. ► ∼95% Cr(VI) was reduced within 30 min. ► Structural and compositional stability of BiOCl was studied in detail.

Keywords
Water purification; Photocatalysis; Chromium reduction; BiOCl
First Page Preview
Bismuth oxychloride-mediated and laser-induced efficient reduction of Cr(VI) in aqueous suspensions
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 439–440, 10 October 2012, Pages 187–191
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis