Abstract: Graphitic carbon nitride g-C3N4 has attracted a scientific interest as a visible light active non-metallic photocatalyst for a H2 evolution. Recently, the techniques aimed at oxidizing g-C3N4 surface have been investigated in order to improve its photocatalytic properties. The present study is devoted to the modification of g-C3N4 via hydrothermal treatment in aqueous H2O2 solution. The treatment led to partial structural decomposition and functionalization of the g-C3N4 surface with −C=O and –COOH groups, thereby affecting the structural, textural, and electronic properties. The platinum deposited on the surface of the pretreated g-C3N4 was in a special configuration with metal particles surrounded by single atoms. The platinized g-C3N4 treated in H2O2 solution at 140 °C was shown to be active in H2 evolution from glucose aqueous solution with a reaction rate of 344 μmol H2·h−1·(gcat)−1 (λmax = 440 nm), while Pt/g-C3N4 without hydrothermal treatment demonstrated no activity. Moreover, the activity of platinized g-C3N4 after hydrothermal treatment was improved by a factor of 4.3 and 9.5 in ethanol and triethanolamine aqueous solutions, respectively. The study presents a novel simple avenue for the synthesis of g-C3N4-based photocatalyst for H2 generation from different substrates, including plant biomass components, thus expanding the scope of g-C3N4 applications.

Cite: Kharina S. , Kurenkova A. , Aydakov E. , Mishchenko D. , Gerasimov E. , Saraev A. , Zhurenok A. , Lomakina V. , Kozlova E.
Activation of g-C3N4 by Oxidative Treatment for Enhanced Photocatalytic H2 Evolution
Applied Surface Science. 2025. V.698. 163074 :1-12. DOI: 10.1016/j.apsusc.2025.163074 publication_identifier_short.sciact_skif_identifier_type

Dates:

Submitted:	Feb 1, 2025
Accepted:	Mar 23, 2025
Published online:	Mar 24, 2025
Published print:	Jul 30, 2025

Identifiers:

publication_identifier.sciact_skif_identifier_type:

3814

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