Adsorption of Zn(II) on graphene oxide prepared from low-purity of amorphous graphite

被引：14
作者：
Yang, Qiang [1 ,2 ,3 ]
Yang, Guangcheng [1 ,2 ,3 ]
Peng, Weijun [1 ,2 ,3 ]
Song, Shaoxian [1 ,2 ,3 ]
机构：
[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China
[2] Wuhan Univ Technol, Hubei Prov Collaborat Innovat Ctr High Efficient, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China
[3] Wuhan Univ Technol, Hubei Key Lab Mineral Resources Proc & Environm, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China
来源：
SURFACE AND INTERFACE ANALYSIS | 2017年 / 49卷 / 05期
基金：
中国国家自然科学基金;
关键词：
graphene oxide; amorphous graphite; zinc ions; adsorption; AQUEOUS-SOLUTION; REMOVAL; PB(II); REDUCTION; METALS; NANOMATERIALS; DISPERSIONS; KINETICS;
D O I：
10.1002/sia.6171
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The adsorption of Zn(II) in aqueous solutions on graphene oxide (GO) prepared from low-purity of natural amorphous graphite has been studied in this work. The study was performed through the measurements of Zeta potential, atomic force microscope, Fourier transform infrared spectrum and X-ray photoelectron spectroscopy. The results indicated that the adsorption followed the Langmuir model with the maximum Zn(II) adsorption capacity of 73mg/g at pH7.0. In addition, the adsorption was well described by the pseudo-second-order kinetics model. The mechanism of the Zn(II) adsorption on GO was mainly attributed to chemical adsorption through complexation reaction between Zn(II) and hydroxyl or carboxyl groups on the GO sheets, while the electrostatic interaction also contribute to the whole interaction. Copyright (c) 2016 John Wiley & Sons, Ltd.
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收藏
页码：398 / 404
页数：7
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