纳米复合材料
光催化
石墨氮化碳
X射线光电子能谱
可见光谱
材料科学
核化学
铀
石墨烯
化学工程
废水
催化作用
化学
纳米技术
冶金
废物管理
有机化学
光电子学
工程类
作者
Dai Zhang,Yusu Sun,Hui Zhang,Dexin Ding,Le Li
出处
期刊:Chemosphere
[Elsevier]
日期:2020-09-01
卷期号:254: 126671-126671
被引量:49
标识
DOI:10.1016/j.chemosphere.2020.126671
摘要
Efficient elimination of U(VI) from uranium wastewater is an urgent task for sustainable nuclear energy and environmental protection. In this study, magnetic graphene oxide decorated graphitic carbon nitride (mGO/g-C3N4) nanocomposite was prepared and used for photocatalytic reduction of U(VI) in wastewater under visible LED light irradiation for the first time. The batch experiments indicated that the mGO/g-C3N4 (mGCN) nanocomposite could efficiently reduce U(VI) under visible LED light, and a high U(VI) extraction capacity of 2880.6 mg/g was obtained with an extraction efficiency of 96.02%. The transmission electron microscopy (TEM) elemental mapping, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analyses demonstrated that the soluble U(VI) was immobilized by transforming it to metastudtite ((UO2)O2·2H2O) by mGCN nanocomposite under visible LED light irradiation. This work indicated that the mGCN is a promising visible light catalyst for treatment of uranium wastewater.
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