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A new sight on hydrogenation of F and N-F doped {0 0 1} facets dominated anatase TiO2 for efficient visible light photocatalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
46259 46436 2012 8 PDF Available
Title
A new sight on hydrogenation of F and N-F doped {0 0 1} facets dominated anatase TiO2 for efficient visible light photocatalyst
Abstract

Nonmetal doping such by N and F has been studied widely to enhance the visible light photoactivity of TiO2. Recently, hydrogenation of pure and N doped TiO2 is also well studied by theoretical calculations. However, little experimental evidence is known about the nature of the hydrogenation effect played on F and N-F doped anatase TiO2. In this study, hydrogenation of F and N-F doped {0 0 1} facets dominated anatase TiO2 were prepared by annealing the doped photocatalysts in the 10-bar H2 atmosphere. Electron paramagnetic resonance (EPR) spectra confirmed the presence of different coordinated Ti3+ and oxygen vacancies located in the hydrogenated N and N-F doped TiO2 as a result of removing the already located N and F species. The visible-light photocatalytic activity of hydrogenated N-F doped TiO2 was significantly enhanced because of the formation of defect energy state belts and disorder structures. This study gives a new sight on the interaction between H and N, F species in doping TiO2 and developing efficient visible light photocatalyst by hydrogenation.

Graphical abstract.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► F will substitute the O during the preparation of {0 0 1} facets dominated TiO2. ► N and F located in TiO2 can be removed completely by hydrogenation. ► Different Ti3+ and Ovac will locate by N-F doping and hydrogenation. ► Disorder structure and defect energy state belt enhance the photoactivity.

Keywords
Ti3+; Visible light photocatalysis; Doping; Oxygen vacancy; {0 0 1} facets
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A new sight on hydrogenation of F and N-F doped {0 0 1} facets dominated anatase TiO2 for efficient visible light photocatalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 127, 30 October 2012, Pages 28–35
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