期刊
CHINESE JOURNAL OF CHEMISTRY
卷 28, 期 10, 页码 1935-1940出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.201090322
关键词
graphene; graphene oxide; colloids; conducting materials
资金
- National Natural Science Foundation of China [50772031]
- Hubei Provincial Department of Science & Technology, China [2009CDA021]
We report an effective method for bulk obtaining exfoliated graphene oxide (GO) solids from their aqueous solutions, which were prepared from nature graphite by an oxidation method. Tyndall effect proved that GO solution has a colloidal nature. Different flocculants were used to coagulate GO colloidal, and it was found that NaOH had the most obvious coagulation effect to GO. Transmission electron microscopy, X-ray diffraction and atomic force microscopy analysis demonstrated that there were a large number of complete few-layer GO sheets with thickness of about 0.8 nm, and the surfaces were very smooth, almost free of impurities. Liquid state C-13 NMR and Fourier transformation infrared spectra showed the presence of abundant benzene carboxylic, hydroxyl and epoxide groups in the basal planes of GO. The graphene materials reduced from GO solids had good electrical conductivity. Our work explored a simple and effective route to extract GO from their solution, which is the most important to GO and graphene researches and applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据