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Selectivity of gold nanoparticles on the photocatalytic activity of TiO2 for the hydroxylation of benzene by water

Paper ID Volume ID Publish Year Pages File Format Full-Text
54917 47031 2013 6 PDF Available
Title
Selectivity of gold nanoparticles on the photocatalytic activity of TiO2 for the hydroxylation of benzene by water
Abstract

The influence of gold nanoparticles on the photocatalytic activity (500 W-medium pressure Hg lamp) of TiO2 anatase for the conversion of benzene to phenol has been studied. Au/TiO2 samples (Au loading ranging from 0.25 to 2.20 wt%) were prepared by the deposition–precipitation method and characterized by chemical analysis, TEM, XRD, and Raman spectroscopy. Photocatalytic tests revealed that the presence of gold nanoparticles initially decreases the reaction rate but for longer reaction times it becomes beneficial and promotes phenol formation almost doubling the reaction yield with respect to unmodified TiO2, without increasing the percentage of hydroquinone, resorcinol and benzoquinone byproducts.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (123 K)Download as PowerPoint slideHighlights► Photocatalytic generation of phenol from benzene. ► TiO2 is a photocatalyst for the transformation of benzene into phenol. ► Gold nanoparticles increase the final phenol yield.

Keywords
Photocatalysis; Titania as photocatalyst; Selectivity of gold nanoparticles photocatalytic benzene hydroxylation; Photocatalytic phenol formation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 206, 1 May 2013, Pages 40–45
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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