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Sensors 2017, 17(6), 1292; doi:10.3390/s17061292

Graphene-Supported Spinel CuFe2O4 Composites: Novel Adsorbents for Arsenic Removal in Aqueous Media

1
School of Science, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia
2
Applied Nanomaterial Laboratory, ANTECH, Hanoi 100000, Vietnam
3
Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 8 May 2017 / Revised: 2 June 2017 / Accepted: 2 June 2017 / Published: 5 June 2017
(This article belongs to the Special Issue Fluorescent Probes and Sensors)
View Full-Text   |   Download PDF [4623 KB, uploaded 5 June 2017]   |  

Abstract

A graphene nanoplate-supported spinel CuFe2O4 composite (GNPs/CuFe2O4) was successfully synthesized by using a facile thermal decomposition route. Scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), Electron Dispersive Spectroscopy (EDS), X-ray diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS) were employed to characterize the prepared composite. The arsenic adsorption behavior of the GNPs/CuFe2O4 composite was investigated by carrying out batch experiments. Both the Langmuir and Freundlich models were employed to describe the adsorption isotherm, where the sorption kinetics of arsenic adsorption by the composite were found to be pseudo-second order. The selectivity of the adsorbent toward arsenic over common metal ions in water was also demonstrated. Furthermore, the reusability and regeneration of the adsorbent were investigated by an assembled column filter test. The GNPs/CuFe2O4 composite exhibited significant, fast adsorption of arsenic over a wide range of solution pHs with exceptional durability, selectivity, and recyclability, which could make this composite a very promising candidate for effective removal of arsenic from aqueous solution. The highly sensitive adsorption of the material toward arsenic could be potentially employed for arsenic sensing. View Full-Text
Keywords: graphene-supported CuFe2O4 composite; graphene nanoplates; spinel CuFe2O4; arsenic removal; graphene-oxide hybrid material graphene-supported CuFe2O4 composite; graphene nanoplates; spinel CuFe2O4; arsenic removal; graphene-oxide hybrid material
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

La, D.D.; Nguyen, T.A.; Jones, L.A.; Bhosale, S.V. Graphene-Supported Spinel CuFe2O4 Composites: Novel Adsorbents for Arsenic Removal in Aqueous Media. Sensors 2017, 17, 1292.

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