Efficient synthesis of graphene oxide and the mechanisms of oxidation and exfoliation | |
Department | 先进润滑与防护材料研究发展中心 |
Yuan R(袁瑞)1,2; Yuan, Jing3; Wu, Yanping(吴䶮平)1,2; Chen L(陈磊)1; Zhou HD(周惠娣)1; Chen JM(陈建敏)1; Chen L(陈磊); Chen JM(陈建敏) | |
The second department | 固体润滑国家重点实验室 |
2017 | |
Source Publication | Applied Surface Science |
ISSN | 0169-4332 |
Volume | 416Pages:868-877 |
Abstract | An efficient method for the preparation of graphene oxide (GO) was descried through inducing the ultrasonic in the rate-determining step of oxidation processes. Both the transformation procedures and the detailed molecular behavior of parent graphene (PG), partially oxidized graphene (PGO) and GO in H2SO4 and aqueous solution were investigated by molecular dynamic simulation (MD) combining with experiments. The results obtained from MD simulation show that the addition of KMnO4 truly marked the beginning of the reaction which carried out from the border of PG flakes to the centre. This oxidation procedure was the rate-determining step and mainly contained three steps: the boundary carbon atoms oxidized, the distance of the corresponding interlayer enlarged and the oxidizing agent diffused into the unoxidized region, the processes was repeated until oxidized completely. So, the introducing ultrasonic in this section can accelerate not only the exfoliation of layers but also the diffusion of oxidizer and finally raises the oxidation efficiency dramatically. To further clarify these simulation results, the GO was prepared by the method mentioned above. The analyses results for the X-ray diffraction (XRD), Raman spectra and X-ray photoelectron spectroscopy (XPS) of the resulting GO show that the ultrasonic method could perfectly shortens the oxidation time from 12 h to 3 h and forms the higher degree of oxidation products with more carboxylic acid groups on its edges. Thus, this study provides a better understanding of the transformation procedures of graphite and proposes an efficient way to produce GOs suitable for various chemical modifications. |
Keyword | Graphite Graphene Oxide Ultrasonic Md Simulation |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.apsusc.2017.04.181 |
Funding Organization | the National Natural Science Foundation of China (U1637204) |
Indexed By | SCI |
If | 3.387 |
Language | 英语 |
Funding Project | 磨损与表面工程研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21975 |
Collection | 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 固体润滑国家重点实验室(LSL) |
Corresponding Author | Chen L(陈磊); Chen JM(陈建敏) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100080, Peoples R China 3.Qinghai Univ Nationalities, Coll Phys Elect Informat Engn, Xining 810007, Qinghai, Peoples R China |
Recommended Citation GB/T 7714 | Yuan R,Yuan, Jing,Wu, Yanping,et al. Efficient synthesis of graphene oxide and the mechanisms of oxidation and exfoliation[J]. Applied Surface Science,2017,416:868-877. |
APA | Yuan R.,Yuan, Jing.,Wu, Yanping.,Chen L.,Zhou HD.,...&陈建敏.(2017).Efficient synthesis of graphene oxide and the mechanisms of oxidation and exfoliation.Applied Surface Science,416,868-877. |
MLA | Yuan R,et al."Efficient synthesis of graphene oxide and the mechanisms of oxidation and exfoliation".Applied Surface Science 416(2017):868-877. |
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