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<p>Photocatalysis offers solutions to a variety of problems, including the treatment of wastewater, the degradation of volatiles, and the removal of dyes, etc. The graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) is one of the candidates to be used as a photocatalyst. The g-C<sub>3</sub>N<sub>4</sub> was synthesized by the polycondensation method with a synthesis temperature from 450 to 650&#xa0;°C. The crystalline structure, composition, morphology and optical properties were analyzed by XRD, FTIR, FESEM, XPS, BET, DRS, and PL. The synthesis of g-C<sub>3</sub>N<sub>4</sub> was confirmed at temperatures of 550&#xa0;°C, 600&#xa0;°C, and 650&#xa0;°C. The calcination temperature influences morphological and optical properties, resulting in a significant decrease in the bandgap of g-C<sub>3</sub>N<sub>4</sub> synthesized at 600&#xa0;°C. Further, the photocatalytic degradation of Rhodamine B (RhB)&#xa0;using g-C<sub>3</sub>N<sub>4</sub> was evaluated under visible irradiation. The synthesis temperature has a profound effect on the photocatalytic activity of g-C<sub>3</sub>N<sub>4.</sub> The sample prepared at a temperature of 600&#xa0;°C shows an apparent rate constant of 0.01387, with 70.85% photodegradation efficiency observed even after 5 cycles for the degradation of RhB, indicating g-C<sub>3</sub>N<sub>4</sub>’s potential for the photocatalytic degradation of RhB. </p>

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Impact of synthesis temperatures on photocatalytic activity of graphitic carbon nitride

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Pratiksha D. Donolikar,
  • Vaishali A. Sawant,
  • Kei Noda,
  • Shivaji B. Sadale

摘要

Photocatalysis offers solutions to a variety of problems, including the treatment of wastewater, the degradation of volatiles, and the removal of dyes, etc. The graphitic carbon nitride (g-C3N4) is one of the candidates to be used as a photocatalyst. The g-C3N4 was synthesized by the polycondensation method with a synthesis temperature from 450 to 650 °C. The crystalline structure, composition, morphology and optical properties were analyzed by XRD, FTIR, FESEM, XPS, BET, DRS, and PL. The synthesis of g-C3N4 was confirmed at temperatures of 550 °C, 600 °C, and 650 °C. The calcination temperature influences morphological and optical properties, resulting in a significant decrease in the bandgap of g-C3N4 synthesized at 600 °C. Further, the photocatalytic degradation of Rhodamine B (RhB) using g-C3N4 was evaluated under visible irradiation. The synthesis temperature has a profound effect on the photocatalytic activity of g-C3N4. The sample prepared at a temperature of 600 °C shows an apparent rate constant of 0.01387, with 70.85% photodegradation efficiency observed even after 5 cycles for the degradation of RhB, indicating g-C3N4’s potential for the photocatalytic degradation of RhB.