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Methods to improve the photocatalytic activity of immobilized ZnO/Bi2O3 composite

Paper ID Volume ID Publish Year Pages File Format Full-Text
41242 45882 2011 7 PDF Available
Title
Methods to improve the photocatalytic activity of immobilized ZnO/Bi2O3 composite
Abstract

In this paper, the photocatalytic activity of the immobilized ZnO/Bi2O3 composite was effectively improved by a special composite technology and surface modification method. The ZnO thin film was coated by a connected Bi2O3 microgrid via a microsphere lithography strategy to form ZnO film/Bi2O3 microgrid heterojunction, which showed higher photocatalytic activity than the pure ZnO film, Bi2O3 film and ZnO film/Bi2O3 film composite under xenon lamp irradiation. The annealing temperature was determined to have a great effect on the photocatalytic activity of ZnO film/Bi2O3 microgrid heterojunction, and the optimum calcining temperature was determined to be 300 °C. Ag particles were deposited on the surface of the samples to further improve the photocatalytic performance. The relationship of the energetic positions of Ag with ZnO or Bi2O3 deduces the separation of photo-generated electrons and holes.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (370 K)Download as PowerPoint slideHighlights► ZnO film/Bi2O3 microgrid showed higher solar-light photocatalytic activity. ► Ag modification improved photocatalytic activity of the ZnO/Bi2O3 heterojunction. ► The proposed ZnO/Ag and Bi2O3/Ag band structures were given to discuss the mechanisms.

Keywords
Photocatalysis; Heterojunction; Microgrid; Ag deposition
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Methods to improve the photocatalytic activity of immobilized ZnO/Bi2O3 composite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 402, Issues 1–2, 31 July 2011, Pages 80–86
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us