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首页> 外文期刊>Catalysis science & technology >Eosin Y-sensitized rose-like MoSx and CeVO4 construct a direct Z-scheme heterojunction for efficient photocatalytic hydrogen evolution
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Eosin Y-sensitized rose-like MoSx and CeVO4 construct a direct Z-scheme heterojunction for efficient photocatalytic hydrogen evolution

机译：曙红Y-sensitized一样崛起MoSx CeVO4构造一个直接Z-scheme异质结高效光催化氢进化

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摘要

The construction of heterojunctions is considered to be an important strategy to improve the performance of photocatalytic hydrogen production and has received more and more attention in recent years. In this work, a simple hydrothermal method was used to prepare a MoSx/CeVO4 composite. The rose-like MoSx has a layered structure that exposes more active sites, which effectively improves the photocatalytic performance of the composite material. MoSx was successfully grown on the surface of irregular bulk CeVO4 by a hydrothermal method, and the optimal hydrogen production reached 295.24 mu mol in 5 h. The main reason for the improved hydrogen production performance is that the direct Z-scheme heterojunction constructed between the two semiconductors inhibits the recombination of electron-hole pairs in MoSx/CeVO4. Photoelectrochemical experiments and UV-vis diffuse reflectance spectra were used to roughly determine the direction of electron transfer between MoSx and CeVO4, and further proved that the construction of a direct Z-scheme heterojunction promotes the separation of electron-hole pairs and can effectively improve the performance of hydrogen production. In addition, photoluminescence spectra further proved that the recombination of electron-hole pairs inside the composite material is effectively suppressed. The preparation of MoSx/CeVO4 has injected new vitality into the production of new energy in the future.
机译：垂直的建设是一个重要的策略来改善光催化制氢的性能已经收到了越来越多的关注最近几年。方法被用来准备一个MoSx / CeVO4合成的。结构,使更积极的网站,有效地提高了光催化复合材料的性能。成功种植在不规则的表面大部分CeVO4由水热方法,最优制氢达到295.24μ摩尔在5 h。改进后的氢的主要原因直接的生产性能Z-scheme异质结之间的构造两种半导体的复合抑制电子空穴对在MoSx / CeVO4。光电化学实验和紫外可见漫反射光谱被用来约确定电子转移的方向MoSx和CeVO4之间,进一步证明了这一点直接Z-scheme建设异质结促进的分离电子空穴对,可以有效改善制氢的性能。此外,光致发光光谱证明电子空穴的复合对复合材料内有效地抑制。MoSx / CeVO4注入了新的活力在未来新能源的生产。

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