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Efficient photocatalytic hydrogen generation by silica supported and platinum promoted titanium dioxide

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Title Efficient photocatalytic hydrogen generation by silica supported and platinum
promoted titanium dioxide
 
Creator Joshi, Meenal M
Labhsetwar, Nitin
Parwate, D V
Rayalu, Sadhana
 
Subject Materials Science
 
Description Titanium dioxide was supported on mesoporous silica and promoted with Pt and Ru. The supported
photocatalysts show high surface area and better photocatalytic activity in visible light as compared to
the benchmark Degussa P25. These photocatalysts were characterized using XRD, BET-SA, and UV-DRS
techniques. The surface area of supported photocatalyst was 140.6 m2/g which is higher than Degussa P-
25. Supported photocatalyst was evaluated for hydrogen evolution via water splitting reaction using
ethanol as a sacrificial donor. Hydrogen yield observed is 4791.43 mmol/h/g of TiO2 and that for P-25 is
161 mmol/h/g of TiO2 under visible light irradiation. The value is 30 times higher than benchmark
material Degussa P-25. This photocatalyst is also found stable up to 24 h without replenishing with
sacrificial donor ethanol. However silica gel/TiO2/Ru does not show any exciting result for hydrogen
generation. The effect of various operating parameters like photocatalyst loading, Illumination time and
intensity of light on supported photocatalyst also has been studied.
 
Publisher Elsevier
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1073/1/joshi2013.pdf
Joshi, Meenal M and Labhsetwar, Nitin and Parwate, D V and Rayalu, Sadhana (2013) Efficient photocatalytic hydrogen generation by silica supported and platinum promoted titanium dioxide. Materials Research Bulletin, 48. pp. 3545-3552. ISSN 0025-5408
 
Relation https://www.journals.elsevier.com/materials-research-bulletin
http://neeri.csircentral.net/1073/