Citation: MENG Yan-Shuang, WANG Chen, WANG Lei, WANG Gong-Rui, XIA Jun, ZHU Fu-Liang, ZHANG Yue. Efficient Synthesis of Sulfur and Nitrogen Co-Doped Porous Carbon by Microwave-Assisted Pyrolysis of Ionic Liquid[J]. Acta Physico-Chimica Sinica, ;2017, 33(9): 1915-1922. doi: 10.3866/PKU.WHXB201705083 shu

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

MENG Yan-Shuang ^1,3, ,
WANG Chen ¹ ,
WANG Lei ¹ ,
WANG Gong-Rui ¹ ,
XIA Jun ¹ ,
ZHU Fu-Liang ^1,3 ,
ZHANG Yue ²

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 Date: 22 March 2017
Revised Date: 28 April 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (51364024, 51404124), Natural Science Foundation of Gansu Province, China (1506RJZA100), and the Foundation for Innovation Groups of Basic Research inGansuProvince, China (1606RJIA322).

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.
- Sulfur and nitrogen co-doped,
- Porous carbon,
- Microwave,
- Pyrolysis,
- Ionic liquid
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