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Photodegradation of rhodamine B in aqueous solution via SiO2@TiO2 nano-spheres

Paper ID Volume ID Publish Year Pages File Format Full-Text
28931 44107 2007 7 PDF Available
Title
Photodegradation of rhodamine B in aqueous solution via SiO2@TiO2 nano-spheres
Abstract

Titania coated silica spheres (SiO2@TiO2) prepared by heterocoagulation of silica and titania nano-particles were investigated as catalyst in the photodegradation of rhodamine B (RB) in aqueous solution. The silica spheres were prepared by the well-known Stöber method and titania sol by a hydrolysis–condensation reaction in acidic media. The uncoated and coated particles were characterized by zeta potential measurements, acoustic attenuation spectroscopy and scanning electron microscopy. The degradation of the dye was induced by illuminating the coated spheres in aqueous solution with artificial solar light. The spectral distribution of the applied light corresponds to the sunlight spectrum on the earth's surface. Rhodamine B was used as model dye and decomposed completely to colourless end products after illumination. The decrease in concentration of rhodamine B was monitored by UV–vis spectroscopy and the total organic carbon (TOC) was determined in order to verify the degradation mechanism described elsewhere.

Keywords
SiO2@TiO2; Rodamine B; Potodegradation; UV–vis spectroscopy; TOC
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Photodegradation of rhodamine B in aqueous solution via SiO2@TiO2 nano-spheres
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 185, Issue 1, 1 January 2007, Pages 19–25
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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