Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 17, Pages 9072-9077Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b00715
Keywords
Au/CITS core-shell; surface plasmon resonance; hydrogen evolution; photocatalysis; anisotropic growth
Funding
- Innovation and Technology Commission
- Hong Kong Polytechnic University
- Patrick S. C. Poon Endowed Professorship
- Hong Kong Ph.D. Fellowship
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Copper-based chalcogenides of earth-abundant elements have recently arisen as an alternate material for solar energy conversion. Cu2FeSnS4 (CITS), a quaternary chalcogenide that has received relatively little attention, has the potential to be developed into a low-cost and environmentlly friendly material for photovoltaics and photocatalysis. Herein, we report, for the first time, the synthesis, characterization, and growth mechanism of novel Au/CITS core-shell nanostructures with controllable morphology. Precise manipulations in the core-shell dimensions are demonstrated to yield two distinct heterostructures with spherical and multipod gold nanoparticle (NP) cores (Au-sp/CITS and Au-mp/CITS). In photocatalytic hydrogen generation with as-synthesized Au/CITS NPs, the presence of Au cores inside the CITS shell resulted in higher hydrogen generation rates, which can be attributed to the surface plasmon resonance (SPR) effect. The Au-sp/CITS and Au-mp/CITS core-shell NPs enhanced the photocatalytic hydrogen generation by about 125% and 240%, respectively, compared to bare CITS NPs.
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