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Cadmium Sulfide and Nickel Synergetic Co-catalysts Supported on Graphitic Carbon Nitride for Visible-Light-Driven Photocatalytic Hydrogen Evolution

机译:石墨化氮化碳上负载的硫化镉和镍协同助催化剂用于可见光驱动的光催化氢生成

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摘要

Design and preparation of noble-metal-free photocatalysts is of great importance for photocatalytic water splitting harvesting solar energy. Here, we report the high visible-light-driven hydrogen evolution upon the hybrid photocatalyst system consisting of CdS nanocrystals and Ni@NiO nanoparticles grown on the surface of g-C3N4. The hybrid system shows a high H2-production rate of 1258.7 μmol h−1 g−1 in the presence of triethanolamine as a sacrificial electron donor under visible light irradiation. The synergetic catalytic mechanism has been studied and the results of photovoltaic and photoluminescence properties show that efficient electron transfer could be achieved from g-C3N4 to CdS nanocrystals and subsequently to Ni@NiO hybrid.
机译:不含贵金属的光催化剂的设计和制备对于光催化水分解收集太阳能至关重要。在这里,我们报告了由CdS纳米晶体和生长在g-C3N4表面的Ni @ NiO纳米颗粒组成的混合光催化剂体系上的高可见光驱动氢释放。在三乙醇胺作为牺牲电子供体的情况下,在可见光照射下,该杂化体系显示出较高的H2生成速率,为1258.7μmolh -1 g -1 。研究了协同催化机理,光伏和光致发光性质的结果表明,可以有效地将电子从g-C3N4转移到CdS纳米晶体,再转移到Ni @ NiO杂化体。

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