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Efficient visible light-induced H-2 production by Au@CdS/TiO2 nanofibers: Synergistic effect of core-shell structured Au@CdS and densely packed TiO2 nanoparticles

Title
Efficient visible light-induced H-2 production by Au@CdS/TiO2 nanofibers: Synergistic effect of core-shell structured Au@CdS and densely packed TiO2 nanoparticles
Authors
Kim, M[Kim, Minju]Kim, YK[Kim, Young Kwang]Lim, SK[Lim, Sang Kyoo]Kim, S[Kim, Soonhyun]In, SI[In, Su-Ii]
DGIST Authors
Kim, M[Kim, Minju]; Kim, YK[Kim, Young Kwang]; Lim, SK[Lim, Sang Kyoo]Kim, S[Kim, Soonhyun]In, SI[In, Su-Ii]
Issue Date
2015-05
Citation
Applied Catalysis B: Environmental, 166, 423-431
Type
Article
Article Type
Article
Keywords
AuCadmium SulfideCdSCompact StructuresElectron TransferGoldGold DepositsIrradiationLightLight AbsorptionNanofibersProduction EfficiencyShells (Structures)Solar H2 ProductionSynergistic EffectTiOTiO2TiO2 NanofibersTitanium DioxideTransfer ElectronsVisible Irradiation
ISSN
0926-3373
Abstract
Semiconductor-based photocatalysts for solar H2 generation has attracted significant attention because of its great potential for low-cost and clean H2 production. In this study, we prepared a core-shell structured Au at CdS on TiO2 nanofibers (Au at CdS/TNF) and investigated its photocatalytic H2 production under visible (λ>420nm) irradiation. Photocatalysts, including Au-deposited CdS/TNF (Au/CdS/TNF) and commercially available TiO2 (P25) instead of TNF, were investigated to determine the effect of a core-shell structured Au at CdS and the role of the TNF. Compared with CdS/TNF and Au/CdS/TNF, the Au at CdS/TNF exhibited strongly enhanced H2 production under visible irradiation. Furthermore, H2 production on Au at CdS/TNF was significantly enhanced compared to Au at CdS/P25. These results can be attributed to the synergistic effect of the core-shell structured Au at CdS and the compact structure of TNF. The core-shell structured Au at CdS may inhibit the formation of CdSO4 from CdS and the Au core could transfer electrons from CdS to TiO2 without any screening effect for light absorption by CdS. Moreover, interparticle electron transfer is more favorable for TNF than P25 due to the well-aligned TNF framework. This work demonstrates the synergistic effects of TiO2-based photocatalysts for the improvement of solar H2 production efficiency. © 2014 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/1573
DOI
10.1016/j.apcatb.2014.11.036
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Division of Nano∙Energy Convergence Research1. Journal Articles
Energy Science and EngineeringGreen and Renewable Energy for Endless Nature(GREEN) Lab1. Journal Articles


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