The Ag–BiOBrxI1−x composite photocatalyst: Preparation, characterization and their novel pollutants removal property

The complex photocatalysts of Ag–BiOBrxI1−x represent high activity and composition-dependent property. The load of Ag improved the separation of photogenerated electron–hole pairs and enhanced the light absorption in the visible region. •A series of Ag–BiOBrxI1−x were prepared by a simple solution...

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Bibliographic Details
Published in:Applied surface science 2013-08, Vol.279, p.374-379
Main Authors: Lei, Yongqian, Wang, Guanhua, Guo, Pengran, Song, Huacan
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Heterostructure
Photocatalytic
Physics
Pollutants remove
Surface plasmon resonance
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Summary:The complex photocatalysts of Ag–BiOBrxI1−x represent high activity and composition-dependent property. The load of Ag improved the separation of photogenerated electron–hole pairs and enhanced the light absorption in the visible region. •A series of Ag–BiOBrxI1−x were prepared by a simple solution route at room temperature.•Ag–BiOBrxI1−x complex photocatalysts show composition-dependent property and enhanced photocatalytic activity.•The enhanced activity results from the optimum band gap structure and the plasmon resonance absorption of Ag on the surface of photocatalysts. A series of Ag-loaded photocatalysts of Ag–BiOBrxI1−x have been synthesized by a solution method and characterized by variety methods. The degradation of rhodamine B (RhB) showed that these samples exhibited excellent and composition-dependent performance in the visible light region. The Ag–BiOBr0.75I0.25 composite photocatalyst shows the highest photocatalytic activity in the degradation of RhB and 4-CP pollution. The load of metal Ag has remarkably improved the photocatalytic activity. The significant enhancement in the Ag–BiOXs photoactivity could be both the effect of Ag deposits as electron traps and the surface plasma resonance absorption effect of Ag. A possible mechanism of enhanced activity of Ag–BiOXs was proposed based on the analysis of the band gap structure.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2013.04.118