Ultrafast plasma immersion strategy for rational modulation of oxygen-containing and amino groups in graphitic carbon nitride

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

  • Shifei Kang
  • Maofen He, University of Shanghai for Science and Technology
  • ,
  • Mengya Chen, University of Shanghai for Science and Technology
  • ,
  • Junjie Wang, University of Shanghai for Science and Technology
  • ,
  • Lulu Zheng, University of Shanghai for Science and Technology
  • ,
  • Xijiang Chang, Donghua University
  • ,
  • Huanan Duan, Shanghai Jiaotong University
  • ,
  • Di Sun
  • Mingdong Dong
  • Lifeng Cui, University of Shanghai for Science and Technology

The co-modulation of the oxygen-containing and amino groups in the polymeric semiconductor graphitic carbon nitride (g-CN) has increasingly become a common concern toward advanced catalysis, energy and biomedicine applications. The intensive understanding of the existence state of oxygen-containing and amino groups in the polymeric structure of g-CN and the controllable methods of modulating these groups is highly desirable. Herein, a rational industrially applicable plasma strategy was designed and applied for controllable modulation of oxygen-containing and amino groups in g-CN within 10 min. X-ray diffractometry, Fourier transform infrared spectrometry, and X-ray photoelectron spectroscopy results indicated that the oxygen-containing and amino groups were controllably introduced after plasma treatment. Transmission electron microscopy, atomic force microscopy and N2 adsorption-desorption measurements verified the ultra-thin and two-dimensional in-plane mesoporous morphology of the optimized g-CN-O-NH2. As a result, the rational g–CN–O-NH2 performed well in Cr(VI) photoreduction, photocatalytic bacterial disinfection and inactivation of tumor cells. The remarkable extensively applicable photocatalytic activity can be ascribed to the fast charge carrier transfer benefiting from the enriched preferable internal edge sites and ideal joint effect of internal –NH2 and OH- groups, as confirmed by the significantly weakened PL fluorescence intensity and prolonged fluorescence lifetime of the excited states under visible light irradiation. This work provides an impressive industrially applicable strategy for the structure optimization and functional groups modulation of polymeric materials towards enhanced electronic and catalytic performances.

Original languageEnglish
JournalCarbon
Volume159
Pages (from-to)51-64
Number of pages14
ISSN0008-6223
DOIs
Publication statusPublished - Apr 2020

    Research areas

  • Functional groups modulation, Graphitic carbon nitride, Industrially applicable production, Photocatalysis, Plasma treatment

See relations at Aarhus University Citationformats

ID: 176485359