Issue 39, 2013
From the journal:

CrystEngComm

Superparamagnetic mesoporous ferrite nanocrystal clusters for efficient removal of arsenite from water†

Wei-Hong Xu,*a   Lei Wang,a   Jing Wang,a   Guo-Ping Sheng,b   Jin-Huai Liu,a   Han-Qing Yub  and  Xing-Jiu Huang*a  

* Corresponding authors

a Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, China
E-mail: whxu@iim.ac.cn, xingjiuhuang@iim.ac.cn
Fax: +86 551 65592420
Tel: +86 551 65591142

b Department of Chemistry, University of Science and Technology of China, Hefei, China
Fax: +86 551 63601592
Tel: +86 551 63607592

Abstract

Contaminated groundwater with a high concentration of arsenic continues to pose health threats to millions of people worldwide, especially in Asia. As(III) is the dominant arsenic species in groundwater, and is more toxic, soluble, and mobile than As(V). Affected communities need accessible technologies to remove As(III) from drinking water, especially in rural areas. In this study, a strategy is adopted to assemble small-sized magnetic MnFe2O4 nanocrystal building blocks to form mesoporous clusters (NCs) with the advantage of increasing the magnetization while retaining superparamagnetic characteristics by using a solvothermal method, which is beneficial for efficient separation from treated water by a moderate magnetic field. The MnFe2O4 NCs combined with uniform mesoporous structure and small constituent nanocrystals (about 8–12 nm in size) provides a synergistic effect for enhanced adsorption performance toward As(III) with an adsorption capacity (>27.27 mg g−1) under neutral conditions. The analysis of Fourier transformed infrared spectra and X-ray photoelectron spectroscopy demonstrates that the adsorption of As(III) on MnFe2O4 NCs is through the formation of a surface complex.

Graphical abstract: Superparamagnetic mesoporous ferrite nanocrystal clusters for efficient removal of arsenite from water

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Article information

DOI
https://doi.org/10.1039/C3CE40944A
Article type
Paper
Submitted
12 Jun 2013
Accepted
05 Aug 2013
First published
06 Aug 2013

CrystEngComm, 2013,15, 7895-7903

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Superparamagnetic mesoporous ferrite nanocrystal clusters for efficient removal of arsenite from water

W. Xu, L. Wang, J. Wang, G. Sheng, J. Liu, H. Yu and X. Huang, CrystEngComm, 2013, 15, 7895 DOI: 10.1039/C3CE40944A

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