光催化
材料科学
纳米棒
纳米复合材料
石墨烯
氧化物
异质结
X射线光电子能谱
化学工程
光化学
制氢
量子点
氢
纳米技术
催化作用
化学
光电子学
有机化学
工程类
冶金
作者
Qianyu Liu,Jian Cao,Yuan Ji,Yumeng Liu,Chunbo Liu,Guang‐Bo Che,Dandan Wang,Junming Cao,Weijun Li,Xiaoyan Liu
标识
DOI:10.1016/j.apsusc.2021.151085
摘要
In this paper, we reported a simple hydrothermal strategy to prepare the direct Z-scheme CdxZn1-xS nanorods-Fe2O3 quantum dots heterojunction/reduced graphene oxide (CdxZn1-xS-FG) nanocomposites as the multifunctional photocatalysts for photocatalytic degradation of organic dyes and photocatalytic hydrogen evolution. By adjusting the molar mass ratio of Cd2+ and Zn2+ ions from 9:1 to 1:9, the bandgap of the CdxZn1-xS-FG nanocomposites can be turned from 2.23 to 3.49 eV. The Cd0.3Zn0.7S-FG nanocomposites exhibited the highest H2 evolution rate of 26.8 mmol h−1 g−1 and the highest degradation efficiency of 97.32% towards MB in 120 min under the visible light irradiation. The excellent photocatalytic activity can be attributed to the high-efficiency transportation and separation of the photogenerated electron-hole pairs, more catalytic active sites and large specific surface area. The mechanism of the photocatalytic hydrogen evolution and photocatalytic degradation had been investigated by ultraviolet photoelectron spectroscopy, scavenging experiment, and UV–Vis absorption spectra. Considering the unique structure, morphology, and excellent photocatalytic performances of the CdxZn1-xS-FG nanocomposites, it will become a burning star in the field of photocatalysis.
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