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Trilayer CdS/carbon nanofiber (CNF) mat/Pt-TiO2 composite structures for solar hydrogen production: Effects of CNF mat thickness

Title
Trilayer CdS/carbon nanofiber (CNF) mat/Pt-TiO2 composite structures for solar hydrogen production: Effects of CNF mat thickness
Authors
Kim, Young KwangLim, Sang KyooPark, HyunwoongHoffmann, Michael R.Kim, Soonhyun
DGIST Authors
Lim, Sang KyooKim, Soonhyun
Issue Date
2016-11-05
Citation
Applied Catalysis B: Environmental, 196, 216-222
Type
Article
Article Type
Article
Keywords
Cadmium SulfideCarbonCarbon Nano-MaterialCarbonizationCarbonization TemperaturesComposite CatalystComposite CatalystsElectron-Transfer MediationElectron TransferElectron Transfer MediatorsElectron TransitionsHeterojunctionsHydrogen ProductionIrradiationLightNanofibersPhoto-Catalytic Water SplittingPlatinumSolar Hydrogen ProductionSolar Power GenerationTitanium DioxideTrilayer HeterostructuresVisible-Light Irradiation
ISSN
0926-3373
Abstract
Solar H2 production by photocatalytic water splitting is a promising technology that permits direct H2 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 TiO2 (Pt-TiO2) for solar H2 production. The CNF mat was prepared by electrospinning and carbonization. CdS and Pt-TiO2 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-TiO2 coating improved the H2 production by a factor of 3.4. This suggests that the H2 production reaction could occur on Pt-TiO2, which is not active under visible irradiation; therefore, the CNF mat could act as an efficient photogenerated electron-transfer mediator from CdS to Pt-TiO2. The H2 production rates of the trilayer CdS/CNF/Pt-TiO2 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-TiO2 sides. The results clearly demonstrated that the CNF acted as an efficient electron-transfer mediator as well as a support material. © 2016 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/5063
DOI
10.1016/j.apcatb.2016.05.045
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Smart Textile Convergence Research Group1. Journal Articles


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