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Photocatalytic degradation of methylene blue in a sparged tube reactor with TiO2 fibers prepared by a properly two-step method

Paper ID Volume ID Publish Year Pages File Format Full-Text
52123 46865 2008 6 PDF Available
Title
Photocatalytic degradation of methylene blue in a sparged tube reactor with TiO2 fibers prepared by a properly two-step method
Abstract

The photocatalytic oxidation of methylene blue has been performed in the presence of suspended TiO2 fibers prepared by a properly two-step method in an air-sparged tube reactor. The key factors affecting the methylene blue oxidation efficiency were investigated, including the initial concentration of methylene blue, the pH value and the electric power of UV lamp. For photodegradation of methylene blue, it was observed that TiO2 fibers have a higher decomposition efficiency than the self-made TiO2 powders, as well as the commercial P25. The optimal conditions were a concentration of 9 × 10−3 mol/l at pH 6 with 40 W of illumination for the fastest rate of methylene blue photodegradation. Diffuse reflectance UV–Vis analysis showed a shift in the threshold absorption value and a corresponding increase in bandgap energy for TiO2 fibers, which is considered to be responsible for the decrease in TiO2 fibers photoactivity after 15 trials.

Keywords
TiO2 fibers; Two-step method; Methylene blue; Photochemical technology
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Photocatalytic degradation of methylene blue in a sparged tube reactor with TiO2 fibers prepared by a properly two-step method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 6, 31 March 2008, Pages 1178–1183
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