Epoxide-Mediated Synthesis of Two-Component Al2O3–TiO2 Aerogels and Their UV-Protective Characteristics-Reference-Cited by-同舟云学术

Epoxide-Mediated Synthesis of Two-Component Al2O3–TiO2 Aerogels and Their UV-Protective Characteristics

Published:2023-12-01 Issue:12 Volume:68 Page:1831-1848
ISSN:0044-457X
Container-title:Журнал неорганической химии
language:
Short-container-title:Žurnal neorganičeskoj himii

Author:

Polevoi L. A.¹,Kolesnik I. V,²,Kopitsa G. P.³⁴,Golikova M. V.¹,Tsvigun N. V.⁵,Khamova T. V.³,Sergeeva A. V.⁶,Gorshkova Yu. E.⁷,Sandzhieva D. A.⁸⁹,Ubushaeva B. V.⁸⁹,Baranchikov A. E.¹,Ivanov V. K.¹²

Affiliation:

1. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

2. Moscow State University

3. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences

4. Konstantinov St. Petersburg Institute of Nuclear Physics, National Research Center “Kurchatov Institute”

5. Shubnikov Institute of Crystallography, Federal Research Center “Crystallography and Photonics”, Russian Academy of Sciences

6. Institute of Volcanology and Seismology, Far-Eastern Branch, Russian Academy of Sciences

7. Joint Institute for Nuclear Research

8. Gubkin Russian State University of Oil and Gas (National Research University)

9. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

Abstract

A new method was proposed to synthesize aerogels based on Al2O3–TiO2 by the hydrolysis of mixed solutions of titanium tetrachloride and aluminum nitrate in the presence of propylene oxide, followed by supercritical drying of the obtained gels. The aerogels are characterized by a high specific surface area (140–500 m2/g) and a high specific porosity (1.7–2.7 cm3/g). Heat treatment of the Al2O3–TiO2 aerogels at temperatures up to 600°C does not lead to crystallization of titanium dioxide, whereas the formation of crystalline anatase in aerogels based on individual TiO2 is observed already at a temperature of 450°C. Using the standardized ISO 24443-2016 method, the SPF value of the obtained materials was determined, which turned out to be comparable to the characteristics of a commercial inorganic UV filter based on TiO2 (Kronos 1171). At the same time, the photocatalytic activity of the Al2O3–TiO2 aerogels turned out to be more than 120 times lower than the similar characteristics of the commercial UV filter based on titanium dioxide. The results obtained demonstrated that the Al2O3–TiO2 aerogels are promising as components of sunscreens.

Publisher

The Russian Academy of Sciences

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