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Trilayer CdS/carbon nanofiber (CNF) mat/Pt-TiO_2 composite structures for solar hydrogen production: Effects of CNF mat thickness

Kim, Young Kwang and Lim, Sang Kyoo and Park, Hyunwoong and Hoffmann, Michael R. and Kim, Soonhyun (2016) Trilayer CdS/carbon nanofiber (CNF) mat/Pt-TiO_2 composite structures for solar hydrogen production: Effects of CNF mat thickness. Applied Catalysis B, 196 . pp. 216-222. ISSN 0926-3373. https://resolver.caltech.edu/CaltechAUTHORS:20160909-091648952

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Abstract

Solar H_2 production by photocatalytic water splitting is a promising technology that permits direct H_2 production from the clean and abundant resources of water and solar light. We successfully fabricated trilayer heterostructures of CdS/carbon nanofiber (CNF) mat/Pt-deposited TiO_2 (Pt-TiO_2) for solar H_2 production. The CNF mat was prepared by electrospinning and carbonization. CdS and Pt-TiO_2 were coated on the front and back of the CNF mat by doctor blading. Under visible-light irradiation on the CdS side, the addition of the Pt-TiO_2 coating improved the H_2 production by a factor of 3.4. This suggests that the H_2 production reaction could occur on Pt-TiO_2, which is not active under visible irradiation; therefore, the CNF mat could act as an efficient photogenerated electron-transfer mediator from CdS to Pt-TiO_2. The H_2 production rates of the trilayer CdS/CNF/Pt-TiO_2 heterostructures were strongly affected by the thickness of the CNF mat and the carbonization temperatures used in production, which affect the resistance of the CNF mat between the CdS and Pt-TiO_2 sides. The results clearly demonstrated that the CNF acted as an efficient electron-transfer mediator as well as a support material.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.apcatb.2016.05.045DOIArticle
http://www.sciencedirect.com/science/article/pii/S0926337316303939PublisherArticle
ORCID:
AuthorORCID
Park, Hyunwoong0000-0002-4938-6907
Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 2016 Elsevier B.V. Received 29 February 2016, Revised 27 April 2016, Accepted 20 May 2016, Available online 20 May 2016.
Subject Keywords:Photocatalytic water splitting; Carbon nanomaterial; Composite catalyst; Electron-transfer mediation
Record Number:CaltechAUTHORS:20160909-091648952
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160909-091648952
Official Citation:Young Kwang Kim, Sang Kyoo Lim, Hyunwoong Park, Michael R. Hoffmann, Soonhyun Kim, Trilayer CdS/carbon nanofiber (CNF) mat/Pt-TiO2 composite structures for solar hydrogen production: Effects of CNF mat thickness, Applied Catalysis B: Environmental, Volume 196, 5 November 2016, Pages 216-222, ISSN 0926-3373, http://dx.doi.org/10.1016/j.apcatb.2016.05.045. (http://www.sciencedirect.com/science/article/pii/S0926337316303939)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:70229
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Sep 2016 17:39
Last Modified:09 Mar 2020 13:19

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