title: A facile approach to the synthesis of graphene nanosheets under ultra-low exfoliation temperature.
abstract: High specific surface area graphene nanosheets have been obtained from graphite oxide by using an effective modified exfoliation method under vacuum, the exfoliation temperature (135 degrees C) is much lower than that conventionally applied (1050 degrees C) to obtain monolayer graphene sheets via rapid thermal shock. These products have fluffy and highly porous structure and with a lateral size typically of a few micrometers. Transmission electron microscopy (TEM) observation shows that it looks like a wrinkled transparent ultrathin film consisting of single or few-layer graphene sheets, and their Brunauer-Emmett-Teller surface area is as large as 750 m2/g. Simultaneously, X-ray photoelectron spectroscopy analysis revealed that considerable amount of oxygen-containing groups (C/O ratio, 5:1) retained on the graphene sheets after exfoliation process, which would provide convenience for further modification of the surface properties and chemistry of graphene sheets. This work offers a facile and scalable approach to fabricate graphene oxide and opens up a new vista of various potential applications electronics and composite materials.
authors.affiliation: Ningbo Key Laboratory of Polymer Materials, Division of Polymers and Composites, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
authors.forename: Hao-Bin
authors.initials: HB
authors.lastname: Zhang
authors.forename: Cao
authors.initials: C
authors.lastname: Chen
authors.forename: Ji-Wen
authors.initials: JW
authors.lastname: Wang
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Lu
authors.forename: Qing
authors.initials: Q
authors.lastname: Yan
authors.forename: Wen-Ge
authors.initials: WG
authors.lastname: Zheng