Morphology-dependent properties and adsorption performance of CeO2 for fluoride removal

被引：155
作者：
Kang, Dongjuan [1 ,2 ]
Yu, Xiaolin [2 ]
Ge, Maofa [2 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, State Key Lab Struct Chem Unstable & Stable Speci, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, Beijing 100190, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2017年 / 330卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Morphology-dependent; CeO2; Fluoride; Removal mechanism; LAYERED DOUBLE HYDROXIDES; CO OXIDATION; OXIDE NANOPARTICLES; EFFICIENT REMOVAL; DRINKING-WATER; ORGANIC-DYE; CATALYSTS; CERIA; ADSORBENT; MECHANISM;
D O I：
10.1016/j.cej.2017.07.140
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Three kinds of CeO2 materials with different morphologies (nanorods, octahedron and nanocube) were prepared by simple hydrothermal method. Adsorption behaviors of fluoride onto the three CeO2 materials were investigated. Three CeO2 materials exhibited different adsorption performance for fluoride. The CeO2 nanorods mainly exposed {1 0 0} and {1 1 0} planes had the highest adsorption capacity for fluoride, whereas the CeO2 nanocubes with {1 0 0} planes exposed showed the lowest adsorption capacity. Characterization results showed that the three CeO2 materials with different morphologies showed different physical and chemical properties, which may result in big difference in their removal mechanism for fluoride, and thus displayed different adsorption performances for fluoride removal. The removal mechanism of fluoride on the three CeO2 mainly included Ce3+-O defect, ion exchange, surface adsorption and pore filling.
引用
收藏
页码：36 / 43
页数：8
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