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Photodegradation of dye pollutants using new nanostructured titania supported on volcanic ashes

Paper ID Volume ID Publish Year Pages File Format Full-Text
41812 45901 2010 8 PDF Available
Title
Photodegradation of dye pollutants using new nanostructured titania supported on volcanic ashes
Abstract

Heterogeneous photocatalysis using UV-radiation and TiO2 is an interesting method for the treatment of water polluted with organic substances. In this study, volcanic ashes (VA) and nanostructured titania supported over volcanic ashes (TVA) were used as photocatalysts for dye pollutants photodegradation using methylene blue as model molecule. The impregnation of VA with anatase-type TiO2, was carried out using a hydrothermal method. Natural and supported material samples were characterized by N2 adsorption–desorption at 77 K, mercury porosimetry, SEM, X-ray diffraction, XPS and UV–vis and IR spectroscopy. The TiO2-nanostructured material displayed good photocatalyst behaviour compared to a commercially used photocatalyst. The effects of type photocatalyst, pH of solution, catalyst amount and adsorption capacity were studied. In addition, the performance of TVA for dye removal under consecutive operation cycles was also investigated. The high photocatalytic activity and the excellent performance under cycling operation displayed by TVA system make it a good candidate to be considered in engineering applications.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (258 K)Download as PowerPoint slideResearch highlights▶ Volcanic ashes can be used as photocatalysts for the treatment of polluted water. ▶ TiO2 supported nanostructured material displayed good photocatalyst behaviour. ▶ Volcanic ashes decontamination system can be considered in engineering applications.

Keywords
Dye pollutants; Hydrothermal treatment; Photodegradation; Photocatalyst; Volcanic ashes
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Photodegradation of dye pollutants using new nanostructured titania supported on volcanic ashes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 388, Issues 1–2, 20 November 2010, Pages 7–14
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