• 文献标题:   Facile one-step hydrazine-assisted solvothermal synthesis of nitrogen-doped reduced graphene oxide: reduction effect and mechanisms
  • 文献类型:   Article
  • 作  者:   WANG RH, WANG Y, XU CH, SUN J, GAO L
  • 作者关键词:  
  • 出版物名称:   RSC ADVANCES
  • ISSN:  
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   71
  • DOI:   10.1039/c2ra21825a
  • 出版年:   2013

▎ 摘  要

Homogeneous colloidal dispersions of nitrogen-doped graphene in N,N-dimethyformamide (DMF) were readily prepared through a facile hydrazine-assisted solvothermal reduction method. The reduced graphene oxide (RGO) sample, prepared at a weight ratio of hydrazine to graphene oxide (GO) of 1.4 : 1 at 180 degrees C, was found to possess the highest conductivity (2716.2 S m(-1)) and good dispersibility (0.5 mg mL(-1)). This work has not only developed an efficient route to prepare high-quality graphene, but also provides a systematic elucidation of the reaction mechanism for the de-oxygenation of GO based on product characterization. It was found that all of the oxygen-containing groups were reduced by hydrazine-assisted solvothermal reduction. The deoxygenation of GO and re-establishment of the conjugated graphene network were significantly promoted by hydrazine de-epoxidation, a Wolff-Kishner-Huang-type reduction, as well as reactions between metastable NHNH2 and hydroxyl groups. The ease of synthesis of nitrogen-doped RGO with both high conductivity and excellent dispersibility will greatly facilitate potential applications.