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Photodegradation of methylene blue by in situ generated titania supported on a NaA zeolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
42781 45941 2009 10 PDF Available
Title
Photodegradation of methylene blue by in situ generated titania supported on a NaA zeolite
Abstract

The degradation of methylene blue dye was evaluated for a series of in situ generated titania resulting from the impregnation of TiCl4 into a series of NaA zeolites, which were synthesized using alternative silicon sources, namely rice husk and chrysotile, and submitted to different treatments. The resulting catalysts were characterized by X-ray diffraction spectrometry, X-ray photoelectron spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, diffuse reflectance and transmittance infrared Fourier transform spectroscopy, energy dispersive X-ray scanning electron microscopy and differential pulse voltammetry. The generated titania are present in the form of anatase phase, without alteration of the zeolite framework. Homogeneous distribution of Ti is reached for up to 10 wt.% Ti, where higher contents seem to afford isolated conglomerates. The highest catalyst activity was reached with samples having 10 wt.% Ti. Catalyst activity was shown to be comparable to that exhibited by commercial P-25 after 1 h of UV light exposition. Experiments carried out in natural sunlight reached 92% decomposition of the methylene blue dye.

Graphical abstractIn situ generated titania was prepared by the impregnation, followed by calcination of TiCl4 on NaA zeolites, prepared using rice husk and chrysotile as silicon sources. Catalyst activity was shown to be comparable to that exhibited by commercial P-25. Experiments carried out in natural sunlight reached 92% decomposition of the methylene blue dye.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Photocatalysis; Chrysotile; Rice husk; Zeolite NaA; Dye
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Photodegradation of methylene blue by in situ generated titania supported on a NaA zeolite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 357, Issue 2, 15 April 2009, Pages 125–134
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