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Photocatalytic Production of Hydrogen from Water with Visible Light Using Hybrid Catalysts of CdS Attached to Microporous and Mesoporous Silicas

Ryu, Su Young and Balcerski, William and Lee, T. K. and Hoffmann, M. R. (2007) Photocatalytic Production of Hydrogen from Water with Visible Light Using Hybrid Catalysts of CdS Attached to Microporous and Mesoporous Silicas. Journal of Physical Chemistry C, 111 (49). pp. 18195-18203. ISSN 1932-7447. https://resolver.caltech.edu/CaltechAUTHORS:20150806-062658852

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Abstract

Microporous and mesoporous silicas are combined with nanoparticulate CdS particles to form hybrid photocatalysts that produce H_2 from water/ethanol solutions under visible light irradiation. Catalyst structures are characterized by XRD and SEM. All hybrid materials are active photocatalysts for water splitting, and the order of photoactivity is found to be zeolite-Y > SBA-15 > zeolite-L. Silica cavity size, which determines, in part, CdS particle size, and photocatalytic activity are found to be correlated. Photocatalytic activity is seen to decrease under acidic or basic conditions with associated negative ionic strength effects. In addition, XPS analysis indicates loss of ion-exchanged and Cd^(2+) ion from the silicate supports occurs during the course of the photochemical reaction in solution with the complete retention of preformed and surface-bound CdS.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/jp074860eDOIArticle
http://pubs.acs.org/doi/abs/10.1021/jp074860ePublisherArticle
ORCID:
AuthorORCID
Hoffmann, M. R.0000-0001-6495-1946
Additional Information:© 2007 American Chemical Society. Received: June 21, 2007; In Final Form: August 10, 2007. Publication Date (Web): November 13, 2007. We are grateful to the Hydrogen Energy Research & Development Center and 21st Century Frontier Research and Development Program of the Ministry of Science and Technology of Korea for research support.
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Ministry of Science and Technology (Korea)UNSPECIFIED
Issue or Number:49
Record Number:CaltechAUTHORS:20150806-062658852
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150806-062658852
Official Citation:Photocatalytic Production of Hydrogen from Water with Visible Light Using Hybrid Catalysts of CdS Attached to Microporous and Mesoporous Silicas Su Young Ryu, William Balcerski, T. K. Lee, and Michael R. Hoffmann The Journal of Physical Chemistry C 2007 111 (49), 18195-18203 DOI: 10.1021/jp074860e
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59253
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Aug 2015 16:42
Last Modified:03 Mar 2020 13:01

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