Carbothermal activation synthesis of 3D porous g-C3N4/carbon nanosheets composite with superior performance for CO2 photoreduction

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Yangang Wang, Jiaxing University
  • ,
  • Qineng Xia, Jiaxing University
  • ,
  • Xia Bai, Jiaxing University, University of Shanghai for Science and Technology
  • ,
  • Zhigang Ge, Jiaxing University
  • ,
  • Qian Yang
  • Chaochuang Yin, University of Shanghai for Science and Technology
  • ,
  • Shifei Kang, University of Shanghai for Science and Technology
  • ,
  • Mingdong Dong
  • Xi Li, Jiaxing University, Fudan University

3D porous nanosheets composite comprised of graphitic carbon nitride (g-C3N4) and carbon was prepared by a simple pyrolysis and subsequent carbothermal activation method for the first time. The morphology and structural properties of obtained 3D porous g-C3N4/C nanosheets composite was systematically investigated. It was found that the morphology of the g-C3N4/C composite evolved from scroll-like structure to 3D porous nanosheets with ultrathin layer after 6 h activation, meanwhile, the specific surface area and pore volume were significantly increased. Such 3D porous nanosheets like these can function as effective catalysts for a range of gas-phase photocatalytic reactions such as photocatalytic reduction of CO2 with H2O vapor to produce value-added fuels. As a demonstration, outstanding photocatalytic activity was achieved on this 3D porous g-C3N4/C nanosheets composite, where ultra-high CO and CH4 yield of 229 and 112 μmol g−1-cat, respectively, were acquired under 7 h simulated solar irradiation, which were 25-fold better than that of bulk g-C3N4. The excellent photocatalytic performance should be attributed to the advantageous structural and compositional features.

Original languageEnglish
JournalApplied Catalysis B: Environmental
Volume239
Pages (from-to)196-203
Number of pages8
ISSN0926-3373
DOIs
Publication statusPublished - 30 Dec 2018

    Research areas

  • 3D porous, Carbon-oxygen groups, CO photoreduction, g-CN/C composite, Graphene-like nanosheets

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