Extraction and characterization of preformed mixed phase graphene sheets from graphitized sub-bituminous coal

Title

Extraction and characterization of preformed mixed phase graphene sheets from graphitized sub-bituminous coal

Creator

Rao A.A.; Raj A.M.; Manoj B.

Description

In present paper, a facile method is reported to extract mixed phase nanometre-sized carbon sheets from sub-bituminous coal. The lattice constants (La and Lc) of sub-bituminous coal were calculated to be 4.82 and 1.41 nm, respectively. The aromatic layers and average number of carbon atoms in the aromatic lamellae were estimated as 5 and 8, respectively. The obtained graphene sheets exhibits broadened D and G band in addition to a very broad 2D bump. Defect to graphitic ratio is found to be 0.54 indicating less disorder in graphene nanomaterial formed. This is further corroborated by (ID/ID') ratio which was observed to be 3.40, confirming the defect has originated from boundary. The SEM analysis reveals the formation of large number of carbon layers with different shape in the nanometer scale range. Formation of graphene dots in the shape of hexagonal, spherical, graphene layers and corn shaped carbon nanotubes are noticed in the TEM image.

Source

Asian Journal of Chemistry, Vol-29, No. 11, pp. 2425-2428.

Date

2017-01-01

Publisher

Chemical Publishing Co.

Subject

Coal; Defected carbon; Graphene dots; Nano-carbon

Coverage

Rao A.A., Department of Physics, Christ University, Bengaluru, 560 029, India; Raj A.M., Department of Physics, Christ University, Bengaluru, 560 029, India; Manoj B., Department of Physics, Christ University, Bengaluru, 560 029, India

Rights

All Open Access; Bronze Open Access

Relation

ISSN: 9707077; CODEN: AJCHE

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.14233/ajchem.2017.20722

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