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Selective oxidation of benzyl alcohol over TiO2 nanosheets with exposed {0 0 1} facets: Catalyst deactivation and regeneration

Paper ID Volume ID Publish Year Pages File Format Full-Text
40394 45852 2013 7 PDF Available
Title
Selective oxidation of benzyl alcohol over TiO2 nanosheets with exposed {0 0 1} facets: Catalyst deactivation and regeneration
Abstract

Increasing interest has been devoted to synthesizing TiO2 nanocrystals with reactive {0 0 1} facets (TiO2-001) as photocatalysts for potential applications, but relative research works on the photocatalytic stability of TiO2-001 nanocrystals are rarely reported. Here, we have prepared TiO2-001 using a facile hydrothermal method and studied its photocatalytic activity and stability toward selective oxidation of benzyl alcohol. The results show that TiO2-001 suffers from a serious deactivation. By a series of joint techniques, we find that lots of oxygen vacancies have been formed on the surface of the used TiO2-001, which is responsible for the loss in photoactivity of TiO2-001. A possible formation mechanism of the oxygen vacancies on the TiO2-001 surface is proposed. The regeneration of the catalyst can be realized by simply refluxing the used TiO2-001 in water at 100 °C.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (140 K)Download as PowerPoint slideHighlights► The stability of TiO2-001 photocatalyst is investigated. ► The TiO2-001 photocatalyst suffers from a serious deactivation. ► The oxygen vacancies formation is responsible for the deactivation. ► A water refluxing method is able to regenerate the deactivated TiO2-001.

Keywords
Selective oxidation; {0 0 1} facets of TiO2; Photocatalyst deactivation; Photocatalyst regeneration
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Selective oxidation of benzyl alcohol over TiO2 nanosheets with exposed {0 0 1} facets: Catalyst deactivation and regeneration
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 453, 26 February 2013, Pages 181–187
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