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首页> 外文期刊>Catalysis science & technology >Enhanced visible-light-driven photocatalytic H-2 production and Cr(vi) reduction of a ZnIn2S4/MoS2 heterojunction synthesized by the biomolecule-assisted microwave heating method
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Enhanced visible-light-driven photocatalytic H-2 production and Cr(vi) reduction of a ZnIn2S4/MoS2 heterojunction synthesized by the biomolecule-assisted microwave heating method

机译:增强visible-light-driven光催化2生产和铬(vi)减少ZnIn2S4 /二硫化钼异质结的合成biomolecule-assisted微波加热的方法

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In this work, the biomolecule-assisted microwave heating synthesis of ZnIn2S4, along with the ZnIn2S4/MoS2 composites and their photocatalytic applications, were studied. Well-defined flower-like ZnIn2S4 microspheres synthesized at microwave heating time of 1 h provided the highest surface area and total pore volume, which offered the highest H-2 production rate (111.6 mu mol h(-1) g(-1)). Different amounts of MoS2 were loaded into the ZnIn2S4 microspheres to form ZnIn2S4/MoS2 composites aiming to improve the H-2 production rate. Among the fabricated ZnIn2S4/MoS2 composites, the ZnIn2S4/MoS2-40% wt composite exhibited the highest H-2 production rate (200.1 mu mol h(-1) g(-1)) under UV-visible light irradiation. In addition, for the first time, this composite was applied for the photoreduction reaction of Cr(vi) ion under visible light irradiation. It provided higher photoreduction efficiency than the single components, where the efficiency was improved in the acidic solutions over the levels recorded in the basic solution. The charge transfer pathway and photocatalytic mechanisms of the ZnIn2S4/MoS2-40% wt photocatalyst have been proposed based on the results obtained from UV-visible diffuse reflectance spectroscopy, photoluminescence spectroscopy, electrochemical impedance spectroscopy, Mott-Schottky measurements and the silver photo-deposition experiment.
机译:在这部作品中,biomolecule-assisted微波炉合成ZnIn2S4加热,随着ZnIn2S4 /二硫化钼复合材料及其光催化应用程序,进行了研究。如花似玉ZnIn2S4微球合成微波加热时间1 h提供了最高的表面积和总孔隙体积提供2产量最高(111.6亩摩尔h (1) g(1))。加载到ZnIn2S4微球形成ZnIn2S4 /二硫化钼复合材料旨在提高2生产速度。ZnIn2S4 /二硫化钼复合材料、ZnIn2S4 wt /二硫化钼- 40%复合材料表现出最高的2的生产率(200.1μ摩尔h (1) g(1))在紫外可见光照射。时间,这个复合应用光致还原作用下的铬(vi)离子反应可见光照射。光致还原作用效率比单一组件、效率提高的地方水平记录在酸性的解决方案基本的解决方案。及光催化机理ZnIn2S4 wt /二硫化钼- 40%光催化剂提出了基于获得的结果紫外可见漫反射光谱,光致发光光谱、电化学阻抗光谱学,Mott-Schottky测量和银photo-deposition实验。

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