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<p>Composite powder photocatalysts based on graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) and graphene oxide (GO) and on g-C<sub>3</sub>N<sub>4</sub> and reduced graphene oxide (rGO) were synthesized. The photocatalysts were studied by X-ray diffraction, scanning electron microscopy, diffuse reflectance spectroscopy, and low-temperature nitrogen adsorption. Next, photoelectrodes were fabricated by spin-coating deposition of the photocatalysts on a fluorine-doped tin oxide (FTO) conductive substrate. The photoelectrodes placed in a three-electrode cell in aqueous Na<sub>2</sub>SO<sub>4</sub> solution were studied by cyclic voltammetry, chronoamperometry with periodic irradiation, and by the Mott—Schottky method. The rGO— g-C<sub>3</sub>N<sub>4</sub> (10: 90 w/w) sample demonstrated the highest photoelectrochemical activity, <i>viz.</i>, the current density was 4.0 mA cm<sup>−2</sup>, which is eight times higher than that of pristine g-C<sub>3</sub>N<sub>4</sub> or rGO.</p>

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Photoelectrochemical properties of composites based on graphitic carbon nitride and graphene oxide or reduced graphene oxide

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • A. V. Zhurenok,
  • V. A. Lomakina,
  • D. V. Markovskaya,
  • A. E. Zazulya,
  • D. B. Vasilchenko,
  • E. A. Kozlova

摘要

Composite powder photocatalysts based on graphitic carbon nitride (g-C3N4) and graphene oxide (GO) and on g-C3N4 and reduced graphene oxide (rGO) were synthesized. The photocatalysts were studied by X-ray diffraction, scanning electron microscopy, diffuse reflectance spectroscopy, and low-temperature nitrogen adsorption. Next, photoelectrodes were fabricated by spin-coating deposition of the photocatalysts on a fluorine-doped tin oxide (FTO) conductive substrate. The photoelectrodes placed in a three-electrode cell in aqueous Na2SO4 solution were studied by cyclic voltammetry, chronoamperometry with periodic irradiation, and by the Mott—Schottky method. The rGO— g-C3N4 (10: 90 w/w) sample demonstrated the highest photoelectrochemical activity, viz., the current density was 4.0 mA cm−2, which is eight times higher than that of pristine g-C3N4 or rGO.