Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (9): 997-1003.doi: 10.15541/jim20170001

Special Issue: 环境材料

• Orginal Article • Previous Articles     Next Articles

Low-cost Preparation of Graphene Papers from Chemical Reduction with FeI2/Ni2+ for Conductivity and Catalytic Propert

Hui NAN1, Wen-Li WANG2, Jian-Hua HAN1, Xue-Wen YIN1, Yu ZHOU1, Xiao-Chong ZHAO3, Hong LIN1()   

  1. 1. State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;
    2. National Engineering Laboratory for Modern Silk; College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
    3. Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, China
  • Received:2017-01-03 Online:2017-09-30 Published:2017-08-29
  • About author:NAN Hui (1984–), male, candidate of PhD. E-mail: 865615800@qq.com
  • Supported by:
    Ministry of Science & Technology of China: Sino-Italy International Cooperation on Innovation (2016YFE0104000)

Abstract:

A novel method to produce reductive graphene oxide (RGO) with FeI2/Ni2+ applied as reductive agent was reported. This method provides a cheap, effective and environmentally friendly route for the large-scale production of RGO without losing its high conductivity and catalytic activity. An extremely high conductivity of 30231 S/m was obtained affer the optimized FeI2/Ni(NO3)2 solution treatment. The enhancement of bulk conductivity was clue to the promotion of the nucleophilic substitution reaction induced by Fe2+ (a strong Lewis acid). Ni2+ was introduced to optimize the reductive process by reducing the concentration of hydrogen ions, which would inhibit the hydrolysis of Fe2+. Furthermore, a high cathodic peak current density was observed when applying the free-standing RGO paper as counter electrode in I-/I3- electrolyte system, indicating the high catalytic performance of the RGO paper and providing electron transporting pathway. These outstanding features exhibit a promising prospect of application in solar cells.

Key words: graphene oxide, metal iodides, chemical reduction, bulk conductivity, catalytic

CLC Number: 

  • TQ174