P13 超音波反応場を用いた低沸点溶媒中でのグラファイトの直接剥離(ポスターセッション)

抄録

Recently, graphene has attracted tremendous research interests due to its unique mechanical, electrical and thermal properties caused by a two-dimensional, single-atom-thick structure of sp2-bonded carbon atoms. In the past few years, several methods, such as chemical vapor deposition and exfoliation of graphite powder in high boiling point solvents, have been used to prepare graphene sheets. It is known that chemical reactions, stirring, dispersion and exfoliation are promoted by ultrasound-cavitation. In this study, the production of unfunctionalized and nonoxidized graphene by exfoliation of graphite flakes in solvents is synthesized and characterized. We used 2-propanol (IPA) and acetic acid as low boiling point solvents. A stable homogeneous dispersion of graphene was obtained by solid-liquid sonochemical reactions using IPA and acetic acid mixed solvents. STEM images and electron diffraction pattern shows the presence of mono- and few-layer graphenes. As a result, graphene could be synthesized in low boiling point solvent. The solvent, IPA, was simply and quickly removed by air-drying, and dose not leave any residue of the solvent in the graphene sheets.