Issue 59, 2015
From the journal:

RSC Advances

Synthesis of reduced graphene oxide-montmorillonite nanocomposite and its application in hexavalent chromium removal from aqueous solutions†

Zilong Zhang,ab   Hanjin Luo,*ab   Xiaolu Jiang,ab   Zhongjie Jianga  and  Chen Yangab  

* Corresponding authors

a School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China
E-mail: luohj@scut.edu.cn
Fax: +86-20-39380508
Tel: +86-20-87110517

b The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China

Abstract

A reduced graphene oxide-montmorillonite (GCM) nanocomposite has been synthesized via a simple solvent method. The results showed that reduced graphene oxide and montmorillonite successfully combined together to form nanocomposites. It indicated that the adsorption of Cr(VI) onto GCM nanocomposites was highly pH-dependent with a maximum adsorptive capacity at pH 2.0. The rate of the Cr(VI) adsorption is founded to follow pseudo-second-order kinetics and can also be explained by an intraparticle diffusion model. In addition, the experimental data fit well with the Freundlich isotherm model. The adsorptive capacity of Cr(VI), as determined from the Langmuir isotherm model, is 12.86 mg g−1 at 20 °C. Regeneration studies reveal that Cr(VI)-loaded GCM can be effectively recycled after the treatment with 0.1 mol L−1 NaOH solution, confirming the potential of the as-prepared material for practical application.

Graphical abstract: Synthesis of reduced graphene oxide-montmorillonite nanocomposite and its application in hexavalent chromium removal from aqueous solutions

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Article information

DOI
https://doi.org/10.1039/C5RA04288G
Article type
Paper
Submitted
11 Mar 2015
Accepted
21 May 2015
First published
21 May 2015

RSC Adv., 2015,5, 47408-47417

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Synthesis of reduced graphene oxide-montmorillonite nanocomposite and its application in hexavalent chromium removal from aqueous solutions

Z. Zhang, H. Luo, X. Jiang, Z. Jiang and C. Yang, RSC Adv., 2015, 5, 47408 DOI: 10.1039/C5RA04288G

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