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Amino group functionalized SiO2@graphene oxide for efficient removal of Cu(II) from aqueous solutions
Li, Min; Feng, Jian; Huang, Kun; Tang, Si; Liu, Ruihua; Li, Huan; Ma, Fuye; Meng, Xiaojing
2019-05-01
Source PublicationCHEMICAL ENGINEERING RESEARCH & DESIGN
ISSN0263-8762
Volume145Pages:235-244
AbstractHerein, we report the synthesis and enhanced Cu(II) ions sorption performance of SiO2@GO-NH2 by an easy, cost-effective and efficient synthesis protocol. Various characterization techniques are employed to study the structure, morphology, chemical composition and porous nature of as-synthesis SiO2@GO-NH2 nanocomposite. Mechanistic insight into the adsorption process has been provided by using pseudo-second-order and Langmuir model. The maximum adsorption capacity of 105.4 mg g(-1) has been attained at 308 K according to Langmuir model and the adsorption equilibrium has been attained within 35 min. The results reveal that as-synthesized SiO2@GO-NH2 possesses fast adsorption kinetics. For the first time, the adsorption mechanism of Cu(II) ions has been explained by using ex-situ post sorption characterization of Cu(II)-loaded SiO(2)OGO-NH2. A series of experiments suggested that the Cu(II) ions are adsorbed on the SiO2@GO-NH2 surface by forming covalent bonds with available functional groups (-NH2 and-NH-). In other words, the adsorption process in SiO2@GO-NH2 is a chemical sorption process. These findings indicate that SiO2@GO-NH2 can be served as a promising sorbent for the efficient recovery and cost-effective elimination of Cu(II) ions from wastewater. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
KeywordGraphene oxide Silica gel Adsorption Cu(II)
Indexed BySCI
Language英语
WOS IDWOS:000469896500023
PublisherINST CHEMICAL ENGINEERS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81122
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Li, Min,Feng, Jian,Huang, Kun,et al. Amino group functionalized SiO2@graphene oxide for efficient removal of Cu(II) from aqueous solutions[J]. CHEMICAL ENGINEERING RESEARCH & DESIGN,2019,145:235-244.
APA Li, Min.,Feng, Jian.,Huang, Kun.,Tang, Si.,Liu, Ruihua.,...&Meng, Xiaojing.(2019).Amino group functionalized SiO2@graphene oxide for efficient removal of Cu(II) from aqueous solutions.CHEMICAL ENGINEERING RESEARCH & DESIGN,145,235-244.
MLA Li, Min,et al."Amino group functionalized SiO2@graphene oxide for efficient removal of Cu(II) from aqueous solutions".CHEMICAL ENGINEERING RESEARCH & DESIGN 145(2019):235-244.
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