Synthesis and characterization of nitrogen-functionalized graphene oxide in high-temperature and high-pressure ammonia

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Document Type

Article

Source Title

RSC Advances

Volume

6

Issue

115

First Page

113924

Last Page

113932

Publication Date

1-1-2016

Abstract

A novel and efficient approach to the synthesis of nitrogen-functionalized graphene oxide (GO) using aqueous ammonia, NH3 (aq.), under high-temperature and high-pressure conditions was investigated. Nitrogen groups (N-groups) were incorporated in GO in different ways; by replacing the carbon (C) atoms and reacting with the oxygenated functionalities present in GO. Reaction mechanisms were proposed, showing how N-groups were attached to GO. Functionalization was confirmed using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), nuclear magnetic resonance (NMR) spectroscopy and elemental analysis (EA). Raman spectroscopy, X-ray diffraction spectroscopy (XRD), and scanning electron microscopy (SEM) were employed to further characterize GO modification. Functionalization was carried out to increase GO adaptability to a wide range of applications, including carbon dioxide (CO2) capture and electrochemical oxygen reduction as reported. © The Royal Society of Chemistry.

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Digitial Object Identifier (DOI)

10.1039/C6RA22885B

Disciplines

Chemical Engineering

Keywords

Graphene; Ammonia; Nuclear magnetic resonance

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