Photooxidation of Organic Chemicals Catalyzed by Nanoscale MoS2

We describe experiments that explore the use of nanosize MoS2 semiconductors for catalyzing the photooxidation of an organic chemical, phenol. The band gap of nanoscale MoS2 can be tuned across the visible spectrum and we show that d = 4.5 nm MoS2 which has an absorbance edge near 550 nm photooxidiz...

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Bibliographic Details
Published in:The journal of physical chemistry. B 1999-01, Vol.103 (1), p.11-17
Main Authors: Thurston, T. R., Wilcoxon, J. P.
Format: Article
Language:English
Online Access:Get full text
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Summary:We describe experiments that explore the use of nanosize MoS2 semiconductors for catalyzing the photooxidation of an organic chemical, phenol. The band gap of nanoscale MoS2 can be tuned across the visible spectrum and we show that d = 4.5 nm MoS2 which has an absorbance edge near 550 nm photooxidizes phenol using only visible light (>450 nm) while smaller band gap d = 8−10 nm MoS2 or wide band gap Degussa P-25 TiO2 do not. The possibility of increasing the rate of photooxidation of phenol by deposition of nanoclusters of MoS2 on bulk semiconductor powders is investigated. It is shown that small amounts (
ISSN:1520-6106
1520-5207
DOI:10.1021/jp982337h