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Elaboration, charge-carrier lifetimes and activity of Pd-TiO2 photocatalysts obtained by gamma radiolysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
27007 43993 2012 10 PDF Available
Title
Elaboration, charge-carrier lifetimes and activity of Pd-TiO2 photocatalysts obtained by gamma radiolysis
Abstract

The surface of four commercial TiO2 compounds (Cristal Global PC-series) has been modified by Pd nanoparticles induced by gamma radiolysis. Their photocatalytic properties have been followed by phenol and rhodamine B photocatalytic degradation in aqueous suspensions under UV and visible light. Their electronic properties have been studied by time resolved microwave conductivity (TRMC) method to follow the charge-carrier dynamics. The experiments evidence a complex behavior of the surface-Pd. Its influence depends on the pollutant and on the irradiation. The modification may be strongly favorable to the photocatalytic activity. The results have been interpreted in terms of modification of charge-carrier dynamics with TRMC measurements. The surface-Pd plays a role in charge-carrier separations, increasing the photocatalytic activity under UV-light, but shows no effect on the absorption properties, preventing the creation of an activity under visible light.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Elaboration of photocatalytic TiO2 for wastewater treatment. ► Surface modification of commercial TiO2 by Pd nanoparticles obtained by gamma radiolysis. ► Photodegradation of phenol and rhodamine B under UV and visible illumination. ► Charge-carrier dynamics followed by time resolved microwave conductivity. ► Influence of palladium nanoparticles on charge-carrier dynamics and photodegradation. ► Promoted photoactivity under UV illumination.

Keywords
Pd-TiO2; Photocatalysis; Radiolysis; Nanoparticles; Organic photocatalytic degradation; TRMC
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Elaboration, charge-carrier lifetimes and activity of Pd-TiO2 photocatalysts obtained by gamma radiolysis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 242, 15 August 2012, Pages 34–43
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