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Surface stabilization of gold by sol–gel post-modification of alumina support with silica for cyclohexane oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
52260 46867 2008 5 PDF Available
Title
Surface stabilization of gold by sol–gel post-modification of alumina support with silica for cyclohexane oxidation
Abstract

Gold nanoparticles were stabilized on alumina support by silica via a surface sol–gel post-modification method and applied for the catalytic cyclohexane oxidation to cyclohexanone and cyclohexanol using oxygen in the absence of any solvent and initiator. The results show that the surface doping of alumina support with silica is highly effective in stabilizing gold nanoparticles subjected to calcination at 500 °C for 3 h. Moreover, the catalytic activity in terms of specific reaction rate and the selectivity to cyclohexanone are appreciably enhanced probably due to a decreased acidity and hydrophilicity by surface substitution of alumina with silica.

Keywords
Gold; Cyclohexane; Oxidation; Sol–gel; Post-modification
First Page Preview
Surface stabilization of gold by sol–gel post-modification of alumina support with silica for cyclohexane oxidation
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 5, 20 March 2008, Pages 816–820
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis