Decorative ZIF-8 covered facet-dependent Cu2O toward highly efficient adsorption by reduction U(VI) to U(IV)
文献类型： 外文期刊
作者： Zhang, Xiaomei 2 ; Yan, Nina 2 ; Wang, Min 2 ; Jiang, Xizhi 2 ; Xu, Rui 2 ; Feng, Min 2 ; Xu, Lei 1 ; Tang, Shaochun 1 ;
作者机构： 1.Nanjing Univ, Coll Engn & Appl Sci, Dept Mat Sci & Engn, Collaborat Innovat Ctr Adv Microstruct,Jiangsu Key, Nanjing 210093, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Protected Agr Engn Middle & Lower Reaches, Nanjing 210014, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Jiangsu Engn Technol Res Ctr Biomass Composites &, Nanjing 210014, Peoples R China
关键词： Facet-dependent; Cu2O@ZIF-8; U(VI); reduction; radioactive wastewater
期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.7； 五年影响因子：7.3 ）
ISSN： 2213-2929
年卷期： 2023 年 11 卷 4 期
页码：
收录情况： SCI
摘要： Developing high-performance materials for efficient and ultra-high capacity of U(VI) removal in radioactive wastewater remains a great challenge. Herein, we report the design and fast microwave-assisted scalable syn-thesis of novel facet-dependent Cu2O@ZIF-8 particles for highly effective reduction to U(IV) at the surface. and separation of the U(VI) ions from aqueous solutions. The Cu2O@ZIF-8 consists of polyhedral Cu2O crystals with dispersed ZIF-8 nanoparticles on their facets, which results in generation of a large number of highly active interfaces. The Cu2O@ZIF-8 shows strong facet-dependence towards the reduction U(VI) ions to U(IV) at the surface where octahedral Cu2O crystals performed better comparing with cubic and octahedral ones. The optimal octahedral Cu2O@ZIF-8 particles exhibit remarkable adsorption capability reaching 330.87 mg g-1, much higher than previously reported values for other adsorption materials. The involved mechanism was investigated, and the adsorption manifestation was found to be in accord with Freundlich isotherm and pseudo-second-order ki-netic behaviors. This work provides a new route to improve U(VI) adsorption capability for highly efficient treatment of radioactive wastewater.
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