Constructing ultralong hollow chain-ball-like carbon nitride implanted with oxygen for superior visible-light photocatalytic hydrogen production

作者：Song, Ting^*; Hou, Linquan; Long, Bei; Ali, Atif; Deng, Guo-Jun

来源：Journal of Alloys and Compounds, 2021, 857: 157609.

DOI：10.1016/j.jallcom.2020.157609

• Graphitic carbon nitride
• Photocatalytic
• Oxygen doped
• Chain-ball-like

Regulating morphology has recently become an effective approach to improve the photocatalytic activity of graphite carbon nitride, but its morphology types are still limited. Herein, ultralong hollow chain-ball-like carbon nitride implanted with oxygen (OCNT) was prepared through a facile supramolecular self-assembly route. The ultralong hollow chain-ball-like structure results in enhanced photoinduced charge carrier separation. In particular, the implantation of oxygen into the chemical backbone leads to the formation of a midgap state, which can more effectively capture visible light. The H-2 production rate (HPR) of OCNT is 5.47 mmol h(-1) g(-1), which is much higher than that of BCN by a factor of 14.0 under visible light irradiation. Moreover, BCN displays the very low HPR with values close to zero, while OCNT exhibits much superior efficiency (1.62 mmol h(-1) g(-1)) under long visible light illumination (lambda > 510 nm). The current research results may furnish fresh insights into the exploration of carbon nitride with different morphologies for high solar energy utilization.

• 单位
  湘潭大学