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Defective TiO2 with oxygen vacancy and nanocluster modification for efficient visible light environment remediation

Paper ID Volume ID Publish Year Pages File Format Full-Text
53321 46962 2016 7 PDF Available
Title
Defective TiO2 with oxygen vacancy and nanocluster modification for efficient visible light environment remediation
Abstract

•Defective TiO2 with oxygen vacancy was prepared by controlling the reduction temperature and time.•Optimum oxygen vacancy in TiO2 enhanced the photocatalytic activity but did not enhance the visible light absorption.•Large amount of oxygen vacancies in TiO2 sharply decreased the photocatalytic activity.•Defective TiO2 with oxygen vacancy and Cu(II) nanoclusters grafting exhibited much enhanced visible light photocatalytic activity.

Defective TiO2 with oxygen vacancy and Cu(II) nanocluster modification has been prepared by reducing in hydrogen atmosphere followed with an impregnation process. The obtained TiO2 samples with optimum oxygen vacancy did not show visible light enhancement. However, the photocatalytic performances of TiO2 samples with larger amount of oxygen vacancies were sharply decreased, even they exhibited much enhanced visible light absorptions. After the modification of Cu(II) nanoclusters, the reduction TiO2 with optimum oxygen vacancy presented much enhanced visible light photocatalytic performance for organic decomposition both in water and air, compared with unreduced TiO2 and other reduced TiO2 samples. Thus, this work provides a facile and efficient route to enhance the photocatalytic performance of TiO2 for practical applications.

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Keywords
TiO2; Oxygen vacancy; Visible light; Nanoclusters; Enhanced photocatalytical activity
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Defective TiO2 with oxygen vacancy and nanocluster modification for efficient visible light environment remediation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 264, 15 April 2016, Pages 236–242
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
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Any Questions? feel free to contact us