Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (10): 2016-2022.doi: 10.3866/PKU.WHXB201508102

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles    

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)

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