Issue 127, 2015

Preparation, characterization, and chemical-induced hydrophobicity of thermostable amine-modified graphene oxide

Abstract

In this study, a hydrophobic and thermostable amine-modified graphene oxide (MGO) material was fabricated using two different methods. p-Toluidine was covalently introduced onto the surface of graphene oxide (GO) sheets using direct and indirect amidation processes to obtain the amine-modified GO (MGO-1 and MGO-2). Successful grafting of p-toluidine at the graphitic framework of graphene oxide was confirmed using infrared spectroscopy and ultraviolet-visible spectroscopy. X-ray photoelectron spectroscopy showed the simultaneous reduction and modification. The reduced weight loss, increased initial decomposition temperature and enhanced residue formation indicate significant improvement of the thermal stability of MGO compared to GO. In addition, MGO-2 has greater thermostability and hydrophobic properties than MGO-1, with a water/air contact angle of ∼126.4°. The hydrophobic and thermostable MGO material could be applied to separate organic contaminants from water, which has great potential in environmentally friendly, low-cost advanced liquid–liquid separation or water treatment technologies.

Graphical abstract: Preparation, characterization, and chemical-induced hydrophobicity of thermostable amine-modified graphene oxide

Supplementary files

Article information

Article type
Paper
Submitted
17 Sep 2015
Accepted
30 Nov 2015
First published
01 Dec 2015

RSC Adv., 2015,5, 105393-105399

Author version available

Preparation, characterization, and chemical-induced hydrophobicity of thermostable amine-modified graphene oxide

J. Wang, H. Geng, Z. Luo, S. Zhang, J. Zhang, J. Liu, H. Yang, S. Ma, B. Sun, Y. Wang, S. Da and Y. Fu, RSC Adv., 2015, 5, 105393 DOI: 10.1039/C5RA19166A

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