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  • Volume 22
  • /
  • Pages.60-69
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  • 2017
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  • 1976-4251(pISSN)
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  • 2233-4998(eISSN)
Korean Carbon Society (한국탄소학회)
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Nitrogen-doped carbon nanosheets from polyurethane foams and removal of Cr(VI)

  • Duan, Jiaqi (Department of Chemical Engineering, School of Environmental and Chemical Engineering, Shanghai University) ;
  • Zhang, Baohua (Department of Chemical Engineering, School of Environmental and Chemical Engineering, Shanghai University) ;
  • Fan, Huailin (State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences) ;
  • Shen, Wenzhong (State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences) ;
  • Qu, Shijie (State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences)
  • Received : 2016.12.14
  • Accepted : 2017.02.10
  • Published : 2017.04.30
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Abstract

Nitrogen-doped carbon nanosheets with a developed porous structure were prepared from polyurethane foams by hydrothermal carbonization following $ZnCl_2$ chemical activation. Scanning electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, solid state $^{13}C$ nuclear magnetic resonance (NMR) spectra and X-ray photoelectron spectroscopy were used to characterize the nitrogen-doped carbon nanosheet structure and composition. The removal of Cr(VI) by the N-doped carbon nanosheets was investigated. The results showed that the maximum removal capacity for chromium of 188 mg/g was found at pH=2.0 with PHC-Z-3. pH had an important effect on Cr(VI) removal and the optimal pH was 2.0. Moreover, amino groups and carboxyl groups in the nitrogen-doped carbon nanosheet played important roles in Cr(VI) removal, and promoted the reduction of Cr(VI) to Cr(III).

Keywords

References

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