Structure Sensitivity of Nano-structured CdS/SBA-15 Containing Au and Pt Co-catalysts for the Photocatalytic Splitting of Water

Photocatalysts containing nanocrystallites of cadmium sulphide dispersed in the channels of mesoporous silicate SBA-15 exhibited enhanced activity for visible-light mediated splitting of water, as compared to bulk CdS. Whereas the incorporation of 1 wt.% Pt co-catalyst in CdS/SBA-15 led to a substan...

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Bibliographic Details
Published in:	Catalysis letters Vol. 121; no. 3-4; pp. 226 - 233
Main Authors:	Lunawat, Puja S., Kumar, Rajiv, Gupta, Narendra M.
Format:	Journal Article
Language:	English
Published:	Boston Springer US 01-03-2008 Springer Springer Nature B.V
Subjects:	Cadmium sulfide Catalysis Catalysts Catalytic activity Chemistry Chemistry and Materials Science Colloidal state and disperse state Crystallites Exact sciences and technology General and physical chemistry Gold Heat of adsorption Industrial Chemistry/Chemical Engineering Noble metals Organometallic Chemistry Photocatalysis Photochemistry Physical Chemistry Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Platinum Porous materials Splitting Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Work functions Role of noble metal co-catalyst Nano-structured cadmium sulphide Structure sensitivity Splitting of water Photocatalysis Water Cadmium Gold Semiconductor materials Transition element compounds Transition metal Cadmium sulfide Porous material Mesoporosity Inorganic compound Heterogeneous catalysis Noble metal Carbon monoxide Structure Catalyst
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Summary:	Photocatalysts containing nanocrystallites of cadmium sulphide dispersed in the channels of mesoporous silicate SBA-15 exhibited enhanced activity for visible-light mediated splitting of water, as compared to bulk CdS. Whereas the incorporation of 1 wt.% Pt co-catalyst in CdS/SBA-15 led to a substantial increase in H 2 yield, Au at similar loading resulted in marginally decreased activity. The results indicate that the photocatalytic activity of CdS crystallites is structure sensitive. Similarly, the role of a noble metal may be associated with the particle size dependent micro-structural features, rather than its electronic properties such as the work function or the heat of adsorption of reactant or product molecules.
ISSN:	1011-372X 1572-879X
DOI:	10.1007/s10562-007-9319-y