A Facile Approach to the Synthesis of Graphene Nanosheets Under Ultra-Low Exfoliation Temperature

被引:8
作者
Zhang, Hao-Bin [1 ]
Chen, Cao [1 ]
Wang, Ji-Wen [1 ]
Yang, Yong [1 ]
Lu, Zhao-Hui [1 ]
Yan, Qing [1 ]
Zheng, Wen-Ge [1 ]
机构
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo Key Lab Polymer Mat, Div Polymers & Composites, Ningbo 315201, Zhejiang, Peoples R China
关键词
Graphene; Graphite Oxide; Thermal Exfoliation; Low Temperature; ELECTROCHEMICAL REDUCTION; OXIDE;
D O I
10.1166/jnn.2011.4068
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 m(2)/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.
引用
收藏
页码:10868 / 10870
页数:3
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