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CuInS2 as Photocatalyst for H2 Evolution: Polyvinylpyrrolidone-Assisted Solvothermal Route to Tuned Microstructures Toward High Performance Photocatalysts

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CuInS2 particles were synthesized by a polyvinylpyrrolidone (PVP)-assisted solvothermal route in ethylene glycol with metal chlorides as precursor. The microstructure of CuInS2 can be tuned from flower- to sphere-like aggregations by increasing the dosage of PVP, with the increased diffraction peak intensity ratio of (220) versus (112). A possible formation mechanism of these CuInS2 particles was proposed, indicating that PVP plays a crucial role in the growth of structured CuInS2. The photocatalytic H2 evolution performance was found to be enhanced with the increasing intensity ratio of (220) versus (112), rather than the specific surface area. Our work shows that (200) facet of CuInS2 possess more active sites for H2 evolution than (004) facet.
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Keywords: CUINS2; EXPOSED FACET; H2 EVOLUTION; PVP-ASSISTED SYNTHESIS

Document Type: Research Article

Publication date: December 1, 2014

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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