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ZnO-based visible-light photocatalyst: Band-gap engineering and multi-electron reduction by co-catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
47032 46456 2010 8 PDF Available
Title
ZnO-based visible-light photocatalyst: Band-gap engineering and multi-electron reduction by co-catalyst
Abstract

Efficient ZnO based visible-light photocatalysts, Cu(II) modified CdxZn1−xO were developed by adopting a hybrid approach, consisting of band-engineering by formation of a solid solution and surface modification of co-catalysts. The CdxZn1−xO solid solution exhibited the visible-light activity for decomposing gaseous acetaldehyde, while bare ZnO showed negligible activity under visible-light. Further, the visible-light activity of CdxZn1−xO photocatalysts was greatly improved by the surface modification of Cu2+ ions. Photogenerated electrons in CdxZn1−xO are injected into the modified Cu2+ ions under visible-light irradiation, and electrons in Cu2+/Cu+ redox couples cause the efficient reduction of absorbed oxygen molecules. The strategy in the present study is a promising approach for applying ZnO-based photocatalysts for indoor applications.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ ZnO based visible-light photocatalyst has been developed by hybrid approach. ▶ One is the formation of CdxZn1−xO for effective visible-light absorption. ▶ Another is surface modification of Cu2+ ions to cause the multi-electron reduction. ▶ The present ZnO based photocatalyst is promising for indoor applications.

Keywords
Zinc oxide; Photocatalyst; Band-engineering; Visible-light
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ZnO-based visible-light photocatalyst: Band-gap engineering and multi-electron reduction by co-catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 100, Issues 3–4, 20 October 2010, Pages 502–509
Authors
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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