Citation: Savitskii D. P.. Preparation and characterization of colloidal dispersions of graphene-like structures from different ranks of coals[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(8): 897-907. shu

Preparation and characterization of colloidal dispersions of graphene-like structures from different ranks of coals

Savitskii D. P. ^,

Institute of Biochemical Technology and Nanotechnology, RUDN University, Moscow 117198, Russian

Corresponding author: Savitskii D. P., den.83@mail.ru
Received Date: 15 February 2017
Revised Date: 23 June 2017

Fund Project: The project was supported by the Ministry of Education and Science of the Russian Federation (the Agreement number 02.a03.21.0008)

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This paper focuses on preparation of colloidal solution of graphene-like structures from different ranks of coals: brown coal, bituminous coal, low-volatile bituminous coal, anthracite. It was found that brown coal thermo-oxidative destruction leads to formation of small d=32 nm (V=17%) and large d=122 nm (V=11%) fractions of nanoparticles. The thermo-oxidative destruction of bituminous coal leads to formation of nanoparticles d=50 nm (V=5.2%) and d=164 nm (V=16%). Thermo-oxidative destruction of low-volatile bituminous coal and anthracite leads to formation of nanoparticles, predominantly, d=122-190 nm. Carbon nanostructures obtained from coal are negatively charged at pH=2-12. Colloidal solution of carbon nanostructures at dispersed phase concentration 0.01 mg/mL is stable for 1 month. Electron diffraction patterns and X-ray analysis of carbon nanostructures showed that nanostructure from brown coal is amorphous and nanostructure from anthracite is crystalline. Results of coal macromolecules modeling and graphene-like structures obtained from them are presented.
- graphene-like structures,
- coal,
- colloidal dispersions,
- particle size distribution,
- electrokinetic potential
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