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

作　　者：D.P.Savitskii 

机构地区：[1]Institute of Biochemical Technology and Nanotechnology,RUDN University

出　　处：《燃料化学学报》2017年第8期897-907,共11页Journal of Fuel Chemistry and Technology

基　　金：supported by the Ministry of Education and Science of the Russian Federation(the Agreement number 02.a03.21.0008)

摘　　要：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%). Thermooxidative 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.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%）. Thermooxidative 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.

关 键 词：象 graphene 一样结构 煤 胶体的分散 粒子尺寸分发 electrokinetic 潜力 

分 类 号：TQ536[化学工程—煤化学工程]