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A novel SiC/Zn0.5Cd0.5S solid-state Z-scheme system and its enhanced hydrogen production activity

2019; Elsevier BV; Volume: 500; Linguagem: Inglês

10.1016/j.apsusc.2019.144009

1873-5584

Shenwei Bai, Hui Mei, Zhipeng Jin, Shanshan Xiao, Laifei Cheng,

ZnO doping and properties

In this article, we for the first time synthesized a series of [email protected]0.5Cd0.5S core-shell Z-scheme nanostructure, with the thickness of the shell varies from 12 nm to 60 nm, and the excellent photocatalytic exists because of the Z-scheme heterojunction mechanism. The Z-scheme system of [email protected]0.5Cd0.5S core-shell structure was proven by the in situ irradiated X-ray photoelectron spectroscopy, the system separated the photo-generated electron-hole pairs, and the core-shell structure performed better photocatalytic properties than Zn0.5Cd0.5S on the hydrogen production under UV–vis light irradiation. With decreasing of the shell thickness, the transient photocurrent response of the Si[email protected]0.5Cd0.5S increased and the photoluminescence decreased, anticipating the creation, collection, transportation of electrons/holes increased, and the electrons/holes recombination suppressed. The hydrogen production rate enhanced to 334% comparing with pure Zn0.5Cd0.5S, showing the advantage of [email protected]0.5Cd0.5S core-shell Z-scheme heterojunction nanostructure.