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Efficient visible light-induced H2 production by Au@CdS/TiO2 nanofibers: Synergistic effect of core–shell structured Au@CdS and densely packed TiO2 nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
45736 46421 2015 9 PDF Available
Title
Efficient visible light-induced H2 production by Au@CdS/TiO2 nanofibers: Synergistic effect of core–shell structured Au@CdS and densely packed TiO2 nanoparticles
Abstract

•We developed a core–shell structured Au-CdS on TiO2 nanofibers (CdS-Au-TNF).•CdS-Au-TNF exhibited highly enhanced H2 production under visible irradiation.•The core–shell structured Au-CdS would be responsible for the enhanced of H2 production.•The densely packed TiO2 nanoparticles are favorable for photocatalytic H2 production.•These modifications are useful to improve the solar H2 production of TiO2-based photocatalysts.

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@CdS on TiO2 nanofibers (Au@CdS/TNF) and investigated its photocatalytic H2 production under visible (λ > 420 nm) 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@CdS and the role of the TNF. Compared with CdS/TNF and Au/CdS/TNF, the Au@CdS/TNF exhibited strongly enhanced H2 production under visible irradiation. Furthermore, H2 production on Au@CdS/TNF was significantly enhanced compared to Au@CdS/P25. These results can be attributed to the synergistic effect of the core–shell structured Au@CdS and the compact structure of TNF. The core–shell structured Au@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.

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Keywords
Solar H2 production; Au; CdS; TiO2; TiO2 nanofibers
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Efficient visible light-induced H2 production by Au@CdS/TiO2 nanofibers: Synergistic effect of core–shell structured Au@CdS and densely packed TiO2 nanoparticles
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 166–167, May 2015, Pages 423–431
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us