Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 18, 2019
Previous Article Next Article

The doping of phosphorus atoms into graphitic carbon nitride for highly enhanced photocatalytic hydrogen evolution

Author affiliations

Abstract

Graphitic carbon nitride (g-C3N4) is a promising candidate for visible-light-driven photocatalytic water splitting. However, some inherent drawbacks of g-C3N4, such as poor charge separation and transfer efficiencies, limited optical absorption and a low surface area, restrain its performance in photocatalytic hydrogen evolution. To solve these problems, in this study, a series of phosphorus (P) doped g-C3N4 (PCN) samples are prepared by direct thermolysis of a mixture of urea and 4-(diphenylphosphino)benzoic acid (4-DPPBA). P atoms have been successfully introduced into the framework of g-C3N4 by forming P–N bonds. The as-obtained samples are investigated for photocatalytic water splitting under visible light. Results reveal that the optimal PCN sample exhibits a high hydrogen evolution rate of 2610.80 μmol h−1 g−1 (λ ≥ 420 nm) in the presence of a sacrificial agent, which is almost 10 times higher than that of bare g-C3N4 (265.00 μmol h−1 g−1). This is mainly ascribed to the fact that electron-rich P atoms, acting as an electron donor, efficiently trap photogenerated holes and substantially suppress the recombination of charge carriers. Besides, the introduction of P atoms modifies the surface properties, narrows the band gap and increases the electrical conductivity. A possible mechanism is proposed for the photocatalytic reaction over PCN samples. Moreover, the PCN samples maintain high photocatalytic activity and chemical stability after recycling experiments, making them promising materials with broad application prospects in solar-to-fuel conversion.

Graphical abstract: The doping of phosphorus atoms into graphitic carbon nitride for highly enhanced photocatalytic hydrogen evolution

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Feb 2019, accepted on 08 Apr 2019 and first published on 08 Apr 2019


Article type: Paper
DOI: 10.1039/C9TA01646E
J. Mater. Chem. A, 2019,7, 11506-11512

  •   Request permissions

    The doping of phosphorus atoms into graphitic carbon nitride for highly enhanced photocatalytic hydrogen evolution

    X. Fang, L. Ma, K. Liang, S. Zhao, Y. Jiang, C. Ling, T. Zhao, T. Cheang and A. Xu, J. Mater. Chem. A, 2019, 7, 11506
    DOI: 10.1039/C9TA01646E

Search articles by author

Spotlight

Advertisements