Synthesis of Nitrogen Doped Graphene through Microwave Irradiation

doi:10.3724/SP.J.1077.2012.00146

Abstract

Abstract:

Graphite oxide was synthesized with Staudenmaier method using natural flake graphite as carbon source. After graphite oxide was impregnated into ammonium carbonate saturated solution, NH₄⁺intercalated graphite oxide was given. Rapid thermal exfoliation and reduction of NH₄⁺intercalated graphite oxide to graphene was achieved as well as the nitrogen-doping of graphene under the condition of microwave irradiation. SEM, TEM, EDS, XRD, XPS and Raman were performed to characterize the synthesized nitrogen-doping of graphene. The synthesized nitrogen-doped graphene was transparent and wrinkled with 2-5 graphite layers. The nitrogen content of as-prepared nitrogen-doped graphene was 1.56wt%, corresponding to pyridinc N, pyrrolic N and graphitic N incorporated into the graphitic network.

Key words: graphene, nitrogen-doped, microwave irradiation

CLC Number:

TQ383

WANG Can, WANG Yan-Li, ZHAN Liang, HE Xing, YANG Jun-He, QIAO Wen-Ming, LING Li-Cheng. Synthesis of Nitrogen Doped Graphene through Microwave Irradiation[J]. Journal of Inorganic Materials, 2012, 27(2): 146-150.

Figures/Tables 6

Fig. 1 XRD patterns of natural graphite, NH4+ intercalated graphite oxide and nitrogen doped graphene

Fig. 2 Optical photos of NH4+ intercalated graphite oxide before (a) and after (b) microwave treatment. SEM images of NH4+ intercalated graphite oxide (c) and nitrogen doped graphene (d,e)

Fig. 3 (a,b) TEM, (c) HRTEM images of nitrogen doped graphene and (d) EDS analysis of nitrogen doped grapheme

Fig. 4 (a) Full-range XPS spectra of graphene and nitrogen doped graphene; (b) C1s and (c) N1s spectra of nitrogen doped graphene; (d) Schematic representation of the nitrogen doped graphene

Fig. 5 Raman spectra of graphene and nitrogen doped graphene

Fig. 6 Schematic illustration of simultaneous doping and exfoliation of graphite oxide

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