Synthesis of vacant graphitic carbon nitride in argon atmosphere and its utilization for photocatalytic hydrogen generation.

ABSTRACT: Graphitic carbon nitride (C₃N₄) was synthesised from melamine at 550 °C for 4 h in the argon atmosphere and then was reheated for 1-3 h at 500 °C in argon. Two band gaps of 2.04 eV and 2.47 eV were observed in all the synthetized materials. Based on the results of elemental and photoluminescence analyses, the lower band gap was found to be caused by the formation of vacancies. Specific surface areas of the synthetized materials were 15-18 m²g^-1 indicating that no thermal exfoliation occurred. The photocatalytic activity of these materials was tested for hydrogen generation. The best photocatalyst showed 3 times higher performance (1547 μmol/g) than bulk C₃N₄ synthetized in the air (547 μmol/g). This higher activity was expla

SUBMITTER: Praus P 

PROVIDER: S-EPMC9365785 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature