Preparation of Photoactive TiO2/LTA Zeolite Composites by Solution Technology in Hydrothermal Conditions

• Published in: Protection of metals and physical chemistry of surfaces Vol. 59; no. 4; pp. 570 - 576
• Main Authors: Ovchinnikov, N. L., Vinogradov, N. M., Gordina, N. E., Butman, M. F.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.08.2023; Springer Nature B.V
• Subjects: Adsorption; Anatase; Catalytic activity; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composite materials; Corrosion and Coatings; Crystallites; Industrial Chemistry/Chemical Engineering; Infrared spectroscopy; Inorganic Chemistry; Low temperature; Materials Science; Metallic Materials; Phase composition; Phase ratio; Photocatalysis; Physicochemical Processes at the Interfaces; Rhodamine; Surface chemistry; Titanium dioxide; Titanium oxides; Tribology; Zeolites
• ISSN: 2070-2051; 2070-206X
• DOI: 10.1134/S2070205123700776

For the first time, using solution technology in a reactor under pressure, composites of titanium oxide and LTA zeolite containing 50, 70, and 80% TiO 2 were obtained. The materials were characterized by XRD, IR spectroscopy, SEM, energy-dispersive microanalysis, and low-temperature nitrogen adsorption–desorption. The adsorption and photocatalytic properties of the composites were studied using the model dye Rhodamine B as an example. The surface morphology and the textural, adsorption, and photocatalytic properties of the resulting composites, as well as the phase composition of TiO 2 , largely depend on the degree of coverage of the surface of the zeolite. For 80% TiO 2 /LTA composites, a degree of coverage close to 100% was observed, and it is for this composition, with a size of TiO 2 crystallites of about 11 nm and an anatase/rutile phase ratio of about 0.54, that the highest photocatalytic activity was found.