物理化学学报 >> 2015, Vol. 31 >> Issue (10): 2016-2022.doi: 10.3866/PKU.WHXB201508102

材料物理化学 上一篇    

水溶液体系中氧化石墨烯的γ射线辐射还原

马慧玲1,2,张龙1,张有为3,刘迪1,孙超1,曾心苗1,*(),翟茂林2,*()   

  1. 1 北京市射线应用研究中心,辐射新材料北京市重点实验室,北京100015
    2 北京大学化学与分子工程学院,北京分子科学国家实验室,北京100871
    3 北京航空材料研究院,隐身材料航空科技重点实验室,北京100095
  • 收稿日期:2015-05-11 发布日期:2015-10-10
  • 通讯作者: 曾心苗,翟茂林 E-mail:sherry_0282_cn@sina.com;mlzhai@pku.edu.cn
  • 基金资助:
    国家自然科学基金(11375019, 11405168, 11505011);中国博士后科学基金(2014M550653)

γ-Ray Induced Reduction of Graphene Oxide in Aqueous Solution

Hui-Ling. MA1,2,Long. ZHANG1,You-Wei. ZHANG3,Di. LIU1,Chao. SUN1,Xin-Miao. ZENG1,*(),Mao-Lin. ZHAI2,*()   

  1. 1 Beijing Key Laboratory of Radiation Advanced Materials, Beijing Research Center for Radiation Application, Beijing 100015, P. R. China
    2 Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
    3 Aviation Key Laboratory of Science and Technology on Stealth Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, P. R. China
  • Received:2015-05-11 Published:2015-10-10
  • Contact: Xin-Miao. ZENG,Mao-Lin. ZHAI E-mail:sherry_0282_cn@sina.com;mlzhai@pku.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(11375019, 11405168, 11505011);China Postdoctoral ScienceFoundation(2014M550653)

摘要:

石墨烯是一种碳原子以二维蜂窝状晶格结构构成的单片层材料,由于其具有优异的电传导性、力学性能和热传导性近年来受到广泛关注.本文采用γ射线辐射技术分别处理水溶液和对苯二胺(PPD)水溶液中的氧化石墨烯(GO),得到辐照还原氧化石墨烯(RGO)和胺基化修饰的还原氧化石墨烯(RGON).通过傅里叶变换红外(FTIR)光谱、X射线光电子能谱(XPS)、拉曼(Raman)光谱、X射线衍射(XRD)和热失重分析(TGA)等表征分析产物的化学结构和元素组成;通过四探针测试仪和接触角测量仪研究产物的导电性能和亲水性.实验结果表明,在水溶液及PPD水溶液中γ射线辐射均可高效还原GO,还原后得到的RGO和RGON电导率均显著增大.PPD的胺基在辐射还原过程中还可以修饰到石墨烯的表面,因此RGON的亲水性比RGO好,但胺基的存在会干扰石墨烯表面π电子的传导,导致其电导率下降.

关键词: 氧化石墨烯, 石墨烯, γ射线辐射, 辐射还原, 导电性能, 亲水性能

Abstract:

Graphene, a one-atom-thick, two-dimensional (2D) sheet of carbon packed in a honeycomb lattice, has striking electronic, mechanical, and thermal properties. Reduced graphene oxide (RGO) and amine-modified reduced graphene oxide (RGON) were obtained by γ-ray induced reduction of a graphene oxide (GO) suspension in purified water and in a p-phenylene diamine (PPD) aqueous solution, respectively. The structures and elemental compositions of GO, RGO, and RGON were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffraction (XRD), and thermogravimetric analysis (TGA). In addition, the electrical conductivities and hydrophilic properties were conducted with four-probe resistivity meter and contact angle measurements, respectively. The results reveal that GO can be well reduced by γ-ray irradiation in either purified water or PPD aqueous solution. Furthermore, the electrical conductivities of obtained RGO and RGON are enhanced. The hydrophilicity of RGON is higher than that of RGO because the amine groups of PPD are modified on the surface of graphene nanosheets during the γ-ray induced reduction. However, the conduction of electron on the surface of graphene can be inhibited by the modified amine groups. Therefore, the electrical conductivity of RGO is higher than that of RGON.

Key words: Graphene oxide, Graphene, γ-Ray irradiation, Radiation-induced reduction, Electrical c onductivity, Hydrophilic property

MSC2000: 

  • O644