Effect of Surface Acidity of Codoped C,S-TiO.sub.2 on Their Photocatalytic Properties in the Hydrogen Evolution and Ethanol Oxidation Processes

• Published in: Theoretical and experimental chemistry Vol. 59; no. 4; p. 260
• Main Authors: Romanovska, N. I, Korzhak, G. V, Grebennikov, V. M, Shulzshenko, O. V, Yaremov, P. S, Ermokhina, N. I, Manoryk, P. A
• Format: Journal Article
• Language: English
• Published: Springer 01-09-2023
• Subjects: Acetaldehyde; Alcohol; Alcohol, Denatured; Hydrogen; Hydrogen-ion concentration; Oxidation-reduction reaction; Sulfuric acid
• ISSN: 0040-5760
• DOI: 10.1007/s11237-024-09784-x

Codoped C,S-TiO.sub.2 nanostructures with similar structural and dimensional characteristics and different surface acidity have been obtained using a hydrothermal sol-gel method in the presence thiourea or sulfuric acid. It is established that C,S-TiO.sub.2 obtained in the presence of H.sub.2SO.sub.4 are characterized with acidity of 0.45 mmol/g that results in a high photocatalytic activity in the process of ethanol oxidation. It is shown that C,S-TiO.sub.2 obtained in the presence of thiourea, exhibits photocatalytic activity in the reaction of hydrogen evolution under UV and visible light irradiation, which increases with surface acidity decreasing.