Issue 31, 2012
From the journal:

Journal of Materials Chemistry

Facile synthesis of multiwall carbon nanotubes/iron oxides for removal of tetrabromobisphenol A and Pb(ii)†

Liqin Ji,a   Lincheng Zhou,*a   Xue Bai,b   Yanming Shao,a   Guanghui Zhao,a   Yanzhi Qu,c   Cong Wanga  and  Yanfeng Lia  

* Corresponding authors

a State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, P. R. China
E-mail: zhoulc@lzu.edu.cn
Fax: +86-931-8912113
Tel: +86-931-8912528

b School of Environment, Tsinghua University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 100084, P. R. China

c Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, P. R. China

Abstract

A one-step thermal decomposition strategy, in which a novel reductant participated, was developed to prepare superparamagnetic nearly cubic monodisperse Fe3O4 nanoparticles loaded on multiwall carbon nanotubes (MWCNTs/Fe3O4). Subsequently, the as-prepared MWCNTs/Fe3O4 nanocomposites were modified with 3-aminopropyltriethoxysilane (APTS) (MWCNTs/Fe3O4–NH2). The materials were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometry (VSM) and the BET surface area method. The results indicated that superparamagnetic Fe3O4 nanoparticles were successfully loaded onto the surface of the MWCNTs, and APTS was also modified on the MWCNTs/Fe3O4 magnetic nanocomposites. The two as-prepared magnetic nanocomposites were used as adsorbents to remove tetrabromobisphenol A (TBBPA) and Pb(II) from wastewater. The adsorption kinetics and adsorption isotherms of TBBPA and Pb(II) on the two as-prepared adsorbents were studied at pH 7.0 and 5.3, respectively. It was revealed that MWCNTs/Fe3O4–NH2 performed better than the MWCNTs/Fe3O4 nanocomposites for the adsorption properties of TBBPA and Pb(II). After adsorption, both adsorbents could be conveniently separated from the media by an external magnetic field within several seconds, and regenerated in 0.1 M NaOH solution.

Graphical abstract: Facile synthesis of multiwall carbon nanotubes/iron oxides for removal of tetrabromobisphenol A and Pb(ii)

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Article information

DOI
https://doi.org/10.1039/C2JM32896H
Article type
Paper
Submitted
09 Dec 2011
Accepted
30 May 2012
First published
03 Jul 2012

J. Mater. Chem., 2012,22, 15853-15862

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Facile synthesis of multiwall carbon nanotubes/iron oxides for removal of tetrabromobisphenol A and Pb(II)

L. Ji, L. Zhou, X. Bai, Y. Shao, G. Zhao, Y. Qu, C. Wang and Y. Li, J. Mater. Chem., 2012, 22, 15853 DOI: 10.1039/C2JM32896H

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