Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (9): 1915-1922.doi: 10.3866/PKU.WHXB201705083

• ARTICLE • Previous Articles    

Efficient Synthesis of Sulfur and Nitrogen Co-Doped Porous Carbon by Microwave-Assisted Pyrolysis of Ionic Liquid

Yan-Shuang MENG1,3,Chen WANG1,Lei WANG1,Gong-Rui WANG1,Jun XIA1,Fu-Liang ZHU1,3,*(),Yue ZHANG2,*()   

  1. 1 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China
    2 Department of Mechanical and Industrial Engineering, Texas A & M University-Kingsville, Kingsville, Texas 78363, USA
    3 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou 730050, P. R. China
  • Received:2017-03-22 Published:2017-07-05
  • Contact: Fu-Liang ZHU,Yue ZHANG E-mail:chzfl@126.com;yue.zhang@tamuk.edu
  • Supported by:
    the National Natural Science Foundation of China(51364024);the National Natural Science Foundation of China(51404124);Natural Science Foundation of Gansu Province, China(1506RJZA100);the Foundation for Innovation Groups of Basic Research in Gansu Province, China(1606RJIA322)

Abstract:

Sulfur and nitrogen co-doped porous carbon (SNDPC) was successfully synthesized using one-step microwave-assisted pyrolysis of ionic liquid. The structure and morphology of the pyrolysis products were characterized by Fourier-transform infrared (FT-IR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD), electron microscopy, and X-ray photoelectron spectroscopy (XPS). The pyrolysis mechanism of the ionic liquid 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide (EMImNTf2) under microwave irradiation was discussed. Microwave irradiation was found to accelerate the pyrolysis of EMImNTf2. The cation of EMImNTf2 works as the precursor of the carbon backbone of the porous carbon, while the anion acts as sulfur source and porosity-directing regulator. The SNDPC was obtained at 320 ℃ and exhibited graphitic structure with numerous surface defects. The atomic percentages of N and S in SNDPC were 12.84% and 1.07%, respectively. The N atoms mainly substitute the C sites in the graphitic carbon matrix, whereas the S atoms mainly bond to the ledges and defects of the carbon matrix.

Key words: Sulfur and nitrogen co-doped, Porous carbon, Microwave, Pyrolysis, Ionic liquid

MSC2000: 

  • O646