Formation Conditions and Properties of Photocatalytic Materials Based on TiO₂--SiO₂ Modified with Zinc Oxide

Abstract

The article uses the sol-gel method to produce photocatalytic materials based on the TiO₂--SiO₂/ZnO system with a component content of 65--10--10 % (wt.) and with the addition of P₂O₅ 15 % (wt.). The stability of solutions over time is studied by viscometry. The solutions are suitable for obtaining film materials for 5 days. The conditions and processes of material formation are recorded using synchronous thermal analysis. To achieve crystallization of titanium dioxide in the anatase phase, the composites are subjected to stepwise heat treatment at temperatures of 60, 300, 400, 500 and 600 °C; each heat treatment stage lasted 30 min. The acid-base properties of the solid surface were evaluated by pH-metry. As a result, active Lewis centers (Si⁴⁺, Ti⁴⁺) were fixed on the surface of the samples, which contributes to an increase in photocatalytic activity. The structure and phase composition of the obtained materials are investigated by IR spectroscopy and X-ray phase analysis. The photocatalytic activity of the samples is estimated using the photometric method. The Zn²⁺ ion has a positive effect on the ability of titanium dioxide to form free charge carriers necessary for the oxidation of various organic pollutants. These can be used for research in photocatalysis and environmental purification

The work was supported by the Development Program of TSU (Priority 2030)

Please cite this article in English as:

Ivanova D.K., Lyutova E.S., Borilo L.P. Formation conditions and properties of photocatalytic materials based on TiO₂--SiO₂ modified with zinc oxide. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2026, no. 1 (124), pp. 118--132 (in Russ.). EDN: XBPFDD

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