Adsorption Properties of Mn3O4@SiO2 Core-Shell Magnetic Composite for Mo (Ⅵ)

被引：0
|
作者：
Sun, Lin [1 ,2 ]
Liu, Zhi-Xiong [1 ,3 ]
Luo, Wen-Bo [1 ,2 ]
Luo, Yi-Ting [1 ,2 ]
Li, Bing-Xuan [1 ,2 ]
机构：
[1] Materials Department of College of Physics, Mechanical and Electrical Engineering, Jishou University, Jishou,Hunan,416000, China
[2] The Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology, 2011 Plan of Hunan Province, Jishou University, Jishou,Hunan,416000, China
[3] National Demonstration Center for Experimental Chemistry Education, Jishou University, Jishou,Hunan,416000, China
来源：
Jingxi Huagong/Fine Chemicals | 2019年 / 36卷 / 08期
关键词：
Core shell structure - Langmuir adsorption isotherms - Magnetic nanocomposites - Mn3O4@SiO2 - Pseudo second order kinetics - Tetraethyl orthosilicates - Thermo dynamic analysis - Water treatment technologies;
D O I：
10.13550/j.jxhg.20180932
中图分类号：
学科分类号：
摘要：
A core-shell magnetic nanocomposite Mn3O4@SiO2 was prepared by oxidation and hydrolysis with manganese (Ⅱ) sulfate monohydrate and tetraethyl orthosilicate (TEOS) as raw materials, and the adsorption performance of Mn3O4@SiO2 nanocomposite for Mo (Ⅵ) ions from aqueous solutions was investigated. The nanocomposite Mn3O4@SiO2 was characterized by XRD, SEM, TEM, FTIR and magnetometer (VSM). The effects of initial pH of the solution, initial Mo (Ⅵ) ions concentration and temperature on the adsorption of Mo (Ⅵ) on nanocomposite Mn3O4@SiO2 were studied. The result showed that the adsorption process gave a maximum adsorption of Mo (Ⅵ) capacity of 145.35 mg/g at pH 2.8,25℃ and Mo (Ⅵ) mass concentration 160 mg/L and could be described by the Langmuir adsorption isotherm model. This process followed the pseudo-second- order kinetics. The thermodynamic analysis revealed that the adsorption process of Mn3O4@SiO2 composite for Mo (Ⅵ) was spontaneous and endothermic reaction. © 2019, Editorial Office of FINE CHEMICALS. All right reserved.
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页码：1677 / 1683
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