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Published on: October 5, 2019
Rational Synthesis of Au-CdS Composite Photocatalysts for Broad-Spectrum Photocatalytic Hydrogen Evolution
Zehong Xu1, Wenhui Yue1, Chunchun Li2
1Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
Surfactant-free gold colloidosomes coupled with cadmium sulfide boost photocatalytic hydrogen evolution. This novel composite material significantly enhances solar energy conversion for clean fuel production.
Area of Science:
- Materials Science
- Nanotechnology
- Photocatalysis
Background:
- Plasmonic metal nanomaterials enhance semiconductor photocatalysts via localized surface plasmon resonance (LSPR).
- Surfactants on nanomaterial surfaces hinder photocatalytic hydrogen evolution by blocking active sites and inhibiting charge transfer.
Purpose of the Study:
- To develop a surfactant-free method for assembling gold nanoparticles (Au NPs) into gold colloidosomes (AuCSs).
- To create Au-CdS composite photocatalysts for enhanced hydrogen evolution.
Main Methods:
- Assembling Au NPs into surfactant-free AuCSs.
- Coupling AuCSs with CdS via in situ deposition to form composite photocatalysts.
- Evaluating photocatalytic hydrogen evolution rates under simulated sunlight.
Main Results:
- AuCSs exhibited broader and stronger LSPR compared to individual Au NPs.
- The absence of surfactants enabled efficient cocatalyst functionality of AuCSs.
- The Au-CdS composite achieved a high hydrogen evolution rate of 235.8 mmol·g-1·h-1.
Conclusions:
- Surfactant-free AuCSs are effective cocatalysts for photocatalytic hydrogen evolution.
- The developed Au-CdS composite shows significant potential for solar fuel production.
- This approach overcomes surfactant-related limitations in plasmonic photocatalysis.
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