期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 139, 期 1, 页码 8-11出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.12.025
关键词
Graphene oxide; Atomic force microscopy (AFM); X-ray photo-emission spectroscopy (XPS); Optical properties
资金
- National Natural Science Foundation of China [21075051, 21143008, 50832001]
- Program for New Century Excellent Talents in University [NCET-10-0433]
- Jilin University, China
- State Key Laboratory of Electroanalytical Chemistry, CIAC, CAS
A convenient and efficient preparation method for separation graphene oxide with well-defined size distribution is developed using a centrifugation technique. The graded profile of graphene oxide nanosheets with narrow size distribution is effectively controlled by varying the centrifugation speed. The results show that the oxygen content of graphene oxide is highly dependent on their size distribution. Graphene oxide nanosheet with large size shows a red-shift in UV-vis absorption spectra, compared to graphene oxide with small size. This phenomenon is interpretation by a density functional theory calculation. The present work will provide a simple method to prepare graphene oxide nanosheets with controllable size distribution and C/O ratio, which will be valuable for the functionalization of graphene-based hybrids and the fabrication of graphene nano-devices. (C) 2012 Elsevier B.V. All rights reserved.
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