Composite Photocatalysts g-C3N4/TiO2 for Hydrogen Production and Dye Decomposition

• Published in: Kinetics and catalysis Vol. 65; no. 2; pp. 112 - 121
• Main Authors: Zhurenok, A. V., Sushnikova, A. A., Valeeva, A. A., Kurenkova, A. Yu, Mishchenko, D. D., Kozlova, E. A., Rempel’, A. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.04.2024; Springer Nature B.V
• Subjects: Carbon nitride; Catalysis; Catalytic activity; Chemistry; Chemistry and Materials Science; Decomposition; Diffuse reflectance spectroscopy; Dyes; Ethanol; Hydrogen evolution reactions; Hydrogen production; Low temperature; Methylene blue; Photocatalysis; Photocatalysts; Photoelectrons; Physical Chemistry; Sol-gel processes; Synthesis; Titanium dioxide; X ray photoelectron spectroscopy; photocatalysis on semiconductors; TiO; g-C; N
• ISSN: 0023-1584; 1608-3210
• DOI: 10.1134/S0023158423601225

The photocatalytic activity of the g-C 3 N 4 /TiO 2 composite samples in the processes of dye (methylene blue) decomposition and hydrogen evolution from an aqueous ethanol solution under the action of visible radiation (400 nm) has been studied. A new original method for the synthesis of the g-C 3 N 4 /TiO 2 composite by depositing g-C 3 N 4 /TiO 2 to TiO 2 nanoparticles during sol-gel synthesis is proposed. The synthesized photocatalysts were characterized by X-ray diffraction, low-temperature gas adsorption, X-ray photoelectron spectroscopy, high-resolution transmission microscopy, and diffuse reflectance spectroscopy in the UV and visible regions. The maximum activity in the hydrogen evolution reaction was 1.3 mmol h –1 , which exceeds the rate of hydrogen evolution on the unmodified g-C 3 N 4 and TiO 2 samples.