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Photocatalytic decompositions of methanol and ethanol on Au supported by pure or N-doped TiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
27281 44014 2013 11 PDF Available
Title
Photocatalytic decompositions of methanol and ethanol on Au supported by pure or N-doped TiO2
Abstract

•Au in nanosize markedly enhances the extent of photodecomposition of methanol.•The main products are methyl formate and H2.•At complete conversion the CO content is 3.9%, CO/H2 = 0.07.•Adding H2O to methanol decreased those values to 0.5% and to 0.07.

The effects of Au particles of different sizes were investigated on the photocatalytic decompositions of methanol and ethanol on pure or N-doped TiO2. IR studies revealed that the deposition of Au promoted the dissociation of both compounds during illumination and also resulted in the formation of formate species. Whereas the photo-induced decompositions of methanol and ethanol occurred to only a limited extent on pure TiO2, the deposition of Au, particularly as nanosized particles, markedly enhanced the rate and the extent of the photocatalyzed reactions. An interesting feature of the photodecomposition of methanol was that, besides H2, CO2 and CO, a significant amount of methyl formate was also produced. Addition of H2O or O2 to the alcohol in both cases decreased the level of CO formed, and in the case of methanol CO was completely eliminated. Au particles on N-doped TiO2 with a lower bandgap catalyzed the photodecompositions of both compounds even in visible light.

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Keywords
Methyl alcohol; Ethyl alcohol; Methyl formate; Photolysis; Au/TiO2 catalyst; Effect of N-doping
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Photocatalytic decompositions of methanol and ethanol on Au supported by pure or N-doped TiO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 271, 1 November 2013, Pages 45–55
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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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