Abstract
Industrial preparation of graphene has been a research hotspot in recent years. Finding an economical and practical carbon source and reducing the cost of production and instrument is significant in industrial graphene production. Coal is a common carbon source. Efficient improvement and utilization in the cleaning of coal has recently been a popular research area. In this study, we developed a set of graphene preparation methods based on Anhui Huainan’s low-rank gas coal (HNGC). Using self-built experimental equipment, benzene precursor was prepared from HNGC and used as carbon source to realize graphene growth. The quality of the graphene was characterized by a high-resolution microscope and Raman spectrometer. This study provides a new idea and method for the preparation of low-rank coal-based graphene.
Highlights
Coal tar is pyrolyzed from collected gas coal at high temperature under oxygen-free conditions, and crude benzene is obtained by distillation, and refined benzene with high concentration is obtained by refining
In order to realize the possibility of growing graphene at a low temperature in future, we examined the number of layers and the morphologic features of graphene grown with different growth conditions, such as benzene flow rates and growth temperature
We used coal as a raw material to obtain refined benzene after repeated distillation and refining, and used it as the precursor of carbon source to obtain monolayer graphene at high temperature (1060 ◦ C) by chemical vapor deposition with different benzene flow rates; the relatively uniform monolayer graphene structure was obtained by low temperature CVD
Summary
As a new type of two-dimensional material, has attracted wide attention from the scientific research community because of its unique crystal structure and electronic properties, which make it have unique electrical, mechanical and thermal properties. Obtaining cheap and controllable technology for the industrial preparation of graphene has been widely pursued by the scientific research community. In this area, obtaining a clean and pure carbon source from cheap and common matter to realize graphene is one of the most popular research areas in recent years. Coal is a kind of carboncontaining organic matter with polycyclic aromatic hydrocarbon as the main structural unit, which exists widely in nature. As a big coal country, China is rich in coal resources
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