X射线光电子能谱
拉曼光谱
光催化
材料科学
光电效应
可见光谱
三元运算
铀
光谱学
辐照
化学工程
纳米复合材料
光电子学
光化学
纳米技术
化学
光学
催化作用
物理
冶金
有机化学
计算机科学
工程类
核物理学
程序设计语言
量子力学
作者
Yifeng Zhang,Mingyu Zhu,Shuo Zhang,Yawen Cai,Zhimin Lv,Ming Fang,Xiaoli Tan,Xiangke Wang
标识
DOI:10.1016/j.apcatb.2020.119390
摘要
Reducing soluble U(VI) to insoluble U(IV) is an ideal strategy to collect/remove uranium in water. In this work, a new way is reported to achieve this reduction through a photocorrosion-related photocatalysis process of SnO2/CdCO3/CdS (SCC) under visible light irradiation. The mechanism is systematically studied and discussed through a variety of characterization methods, such as X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Mott-Schottky test, etc. The matching of energy band ensures the separation of photoelectrons and holes, which results in the decrease of charges’ recombination rate and the enhancement of photoreduction activity. The reduction process can be efficiently performed in the ternary complex of SCC in that the photo-generated holes are consumed by oxidization of S2− to S0 on CdS in SCC. Furthermore, uranium extraction could be achieved by SCC without any protective gases or electronic sacrificial agent, which shows great advantages in applications of U(VI) collection/removal.
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