Structural characterization of graphene layers in various Indian coals by X-Ray Diffraction technique

International Conference on Materials Science and Technology 2012

Manoj, B.^1 ; Kunjomana, A.G.^1

Department of Physics, Christ University, Bangalore-29, Karnataka

5600029, India^1

关键词: Aromaticities;    Graphene layers;    Interlayer spacings;    Structural characterization;    Structural investigation;    Structural parameter;    Turbostratic;    X-ray diffraction techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/73/1/012096/pdf
DOI  :  10.1088/1757-899X/73/1/012096

来源: IOP

【 摘 要 】

The results of the structural investigation of three Indian coals showed that, the structural parameters like fa & Lc increased where as interlayer spacing d002 decreased with increase in carbon content, aromaticity and coal rank. These structural parameters change just opposite with increase in volatile matter content. Considering the 'turbostratic' structure for coals, the minimum separation between aromatic lamellae was found to vary between 3.34 to 3.61 A° for these coals. As the aromaticity increased, the interlayer spacing decreased an indication of more graphitization of the sample. Volatile matter and carbon content had a strong influence on the aromaticity, interlayer spacing and stacking height on the sample. The average number of carbon atoms per aromatic lamellae and number of layers in the lamellae was found to be 16-21 and 7-8 for all the samples.