title: Efficient and large scale synthesis of graphene from coal and its film electrical properties studies.
abstract: Coal, which is abundant and has an incompact structure, is a good candidate to replace graphite as the raw material for the production of graphene. Here, a new solution phase technique for the preparation of graphene from coal has been developed. The precursor: graphene oxide got from coal was examined by atomic force microscopy, dynamic light scattering and X-ray diffraction, the results showed the GO was a small and single layer sheet. The graphene was examined by X-ray photoelectron spectroscopy, and Raman spectroscopy. Furthermore, graphene films have been prepared using direct solution process and the electrical conductivity and Hall effect have been studied. The results showed the conductivity of the films could reach as high as 2.5 x 10(5) Sm(-1) and exhibited an n-type behavior.
authors: Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
authors: Yingpeng
authors: Y
authors: Wu
authors: Yanfeng
authors: Y
authors: Ma
authors: Yan
authors: Y
authors: Wang
authors: Lu
authors: L
authors: Huang
authors: Na
authors: N
authors: Li
authors: Tengfei
authors: T
authors: Zhang
authors: Yi
authors: Y
authors: Zhang
authors: Xiangjian
authors: X
authors: Wan
authors: Yi
authors: Y
authors: Huang
authors: Yongsheng
authors: Y
authors: Chen