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Cu-doped TiO2 systems with improved photocatalytic activity

Paper ID Volume ID Publish Year Pages File Format Full-Text
48934 46531 2006 11 PDF Available
Title
Cu-doped TiO2 systems with improved photocatalytic activity
Abstract

Photocatalytic oxidation of phenol was performed over copper doped TiO2 prepared by a sol–gel method. Different preparation methods were followed and a comparison with undoped system was also made. Wide structural and surface characterization of catalysts was carried out in order to establish a correlation between the effect of sulphuric and nitric acids present in the initial solution and the Cu–TiO2 photocatalytic properties. The presence of sulphuric acid clearly stabilizes Cu–TiO2 and TiO2 structure and surface against sintering, maintaining anatase phase and relatively high surface area values with respect non sulphated Cu–TiO2 or TiO2. Best photocatalytic behaviour is found for sulphated TiO2, as previously reported. In addition, incorporation of copper ions into the structure seems to enhance the photoactivity of the system for acidified systems, being the sulphated one the most favourable photocatalyst. The optimum metal loading is found for 0.5 M% of copper ion. A possible explanation of this photocatalytic improvement might be related to the stabilization of Cu2O species in doped TiO2 prepared in the presence of sulphuric acid. This stabilization could be related to the presence of oxygen vacancies generated in the preparation procedure using sulphuric acid.

Keywords
Cu-doped TiO2; Photocatalysis; Sulphated TiO2; Anatase stabilization; Oxygen vacancies
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 67, Issues 1–2, 11 September 2006, Pages 41–51
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
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Online Support
Any Questions? feel free to contact us