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Bismuth-rich strategy induced photocatalytic molecular oxygen activation properties of bismuth oxyhalogen: The case of Bi24O31Cl10

Paper ID Volume ID Publish Year Pages File Format Full-Text
45600 46416 2015 8 PDF Available
Title
Bismuth-rich strategy induced photocatalytic molecular oxygen activation properties of bismuth oxyhalogen: The case of Bi24O31Cl10
Abstract

•Bismuth-rich strategy can be used to promote the CBM of bismuth oxyhalide.•Bi24O31Cl10 nanosheets with {1 0 0} facets exposure were successfully synthesized.•As-synthesized Bi24O31Cl10 can effectively activate molecular oxygen.

Molecular oxygen activation is very important for photocatalytic degradation of organic pollutants. In this paper, Bi24O31Cl10 nanosheets with {1 0 0} facets exposure were successfully synthesized by hydromel method and characterized. The size of a single nanosheet is about 5 μm in width and 10–30 nm in thickness, which results in a large ratio of surface to thickness and higher exposure ratio of {1 0 0} facets. The Mott–Schottky test revealed that the conduction band minimum (CBM) of Bi24O31Cl10 is more negative than BiOCl due to the bismuth-rich strategy. And the photocatalytic results showed that as-synthesized Bi24O31Cl10 showed higher photocatalytic properties than BiOCl for activate molecular oxygen to generate superoxide radical (O2•−) under visible light (λ > 420 nm) irradiation, and generate hydroxyl radical (•OH) under UV–vis light irradiation. This strategy in this work may potentially be extended to other bismuth-based photocatalysts for molecular oxygen activation.

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Keywords
Bi24O31Cl10; Molecular oxygen activation; Photocatalysis; Bismuth-rich strategy
First Page Preview
Bismuth-rich strategy induced photocatalytic molecular oxygen activation properties of bismuth oxyhalogen: The case of Bi24O31Cl10
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 165, April 2015, Pages 668–675
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis