Issue 1, 2015
From the journal:

RSC Advances

Polyethylenimine modified magnetic graphene oxide nanocomposites for Cu2+ removal

Ning Sui,a   Lina Wang,*c   Xiaohan Wu,a   Xinghua Li,a   Jing Sui,a   Hailian Xiao,a   Manhong Liu,a   Jun Wanc  and  William W. Yu*ab  

* Corresponding authors

a College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
E-mail: lnwang2006@163.com, wyu6000@gmail.com

b Department of Chemistry and Physics, Louisiana State University, Shreveport, LA 71115, USA

c College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Abstract

Fe3O4 nanoparticles were synthesized on graphene oxide (GO), then mixed with polyethylenimine to obtain GO/Fe3O4/PEI nanocomposites. Due to the high surface area of GO, superparamagnetism of Fe3O4, and excellent complex ability of PEI, the nanocomposites showed extremely high Cu2+ removal efficiency. The Cu2+ removal capacity was 157 mg g−1, which is higher than most reported results. The adsorption kinetics could be best described by a pseudo-second-order model. Moreover, GO/Fe3O4/PEI nanocomposites could be easily recycled by magnetic separation. After five cycles, the removal efficiency remained 84%.

Graphical abstract: Polyethylenimine modified magnetic graphene oxide nanocomposites for Cu2+ removal

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Article information

DOI
https://doi.org/10.1039/C4RA11669K
Article type
Paper
Submitted
02 Oct 2014
Accepted
24 Nov 2014
First published
24 Nov 2014

RSC Adv., 2015,5, 746-752

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Polyethylenimine modified magnetic graphene oxide nanocomposites for Cu2+ removal

N. Sui, L. Wang, X. Wu, X. Li, J. Sui, H. Xiao, M. Liu, J. Wan and W. W. Yu, RSC Adv., 2015, 5, 746 DOI: 10.1039/C4RA11669K

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