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Obtaining and Properties of a Photocatalytic Composite Material of the “SiO(2)–TiO(2)” System Based on Various Types of Silica Raw Materials

Compositions and technology for obtaining a photocatalytic composite material (PCM) by deposition of titanium dioxide particles synthesized by the sol–gel method on a silica support of various types (microsilica, gaize and diatomite) have been developed. The properties (chemical and mineral composit...

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Autores principales: Strokova, Valeria, Gubareva, Ekaterina, Ogurtsova, Yulia, Fediuk, Roman, Zhao, Piqi, Vatin, Nikolai, Vasilev, Yuriy
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8065727/
https://www.ncbi.nlm.nih.gov/pubmed/33805267
http://dx.doi.org/10.3390/nano11040866
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author Strokova, Valeria
Gubareva, Ekaterina
Ogurtsova, Yulia
Fediuk, Roman
Zhao, Piqi
Vatin, Nikolai
Vasilev, Yuriy
author_facet Strokova, Valeria
Gubareva, Ekaterina
Ogurtsova, Yulia
Fediuk, Roman
Zhao, Piqi
Vatin, Nikolai
Vasilev, Yuriy
author_sort Strokova, Valeria
collection PubMed
description Compositions and technology for obtaining a photocatalytic composite material (PCM) by deposition of titanium dioxide particles synthesized by the sol–gel method on a silica support of various types (microsilica, gaize and diatomite) have been developed. The properties (chemical and mineral composition, dispersion, specific surface area, porosity, ζ-potential, acid–base properties, and microstructure) of microsilica, gaize and diatomite were studied to assess the effectiveness of using a photocatalytic agent as a carrier. In terms of specific viscosity (η(sp) = 45), the concentration of the precursor (tetrabutoxytitanium—TBT) is set at 22 vol. % in a solvent (ethanol), at which it is possible to obtain the maximum amount of dissolved film oligomer without the formation of an aggregate-like precipitate. Modification of the reaction mixture (precursor: ethanol = 1:3) by replacing part of the solvent with a Span-60 surfactant/TBT = 1–1.1 made it possible to obtain polydisperse titanium dioxide particles with peak sizes of 43 nm and 690 nm according to laser granulometry data. Taking into account the interaction of titanium complexes with the surface of a silica support, a phenomenological model of the processes of structure formation of a photocatalytic composite material is proposed. By the value of the decomposition of rhodamine B, the photocatalytic activity of the developed composite materials was determined: PCM based on diatomite—86%; PCM based on microsilica—85%; PCM based on gaize—57%.
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spelling pubmed-80657272021-04-25 Obtaining and Properties of a Photocatalytic Composite Material of the “SiO(2)–TiO(2)” System Based on Various Types of Silica Raw Materials Strokova, Valeria Gubareva, Ekaterina Ogurtsova, Yulia Fediuk, Roman Zhao, Piqi Vatin, Nikolai Vasilev, Yuriy Nanomaterials (Basel) Article Compositions and technology for obtaining a photocatalytic composite material (PCM) by deposition of titanium dioxide particles synthesized by the sol–gel method on a silica support of various types (microsilica, gaize and diatomite) have been developed. The properties (chemical and mineral composition, dispersion, specific surface area, porosity, ζ-potential, acid–base properties, and microstructure) of microsilica, gaize and diatomite were studied to assess the effectiveness of using a photocatalytic agent as a carrier. In terms of specific viscosity (η(sp) = 45), the concentration of the precursor (tetrabutoxytitanium—TBT) is set at 22 vol. % in a solvent (ethanol), at which it is possible to obtain the maximum amount of dissolved film oligomer without the formation of an aggregate-like precipitate. Modification of the reaction mixture (precursor: ethanol = 1:3) by replacing part of the solvent with a Span-60 surfactant/TBT = 1–1.1 made it possible to obtain polydisperse titanium dioxide particles with peak sizes of 43 nm and 690 nm according to laser granulometry data. Taking into account the interaction of titanium complexes with the surface of a silica support, a phenomenological model of the processes of structure formation of a photocatalytic composite material is proposed. By the value of the decomposition of rhodamine B, the photocatalytic activity of the developed composite materials was determined: PCM based on diatomite—86%; PCM based on microsilica—85%; PCM based on gaize—57%. MDPI 2021-03-29 /pmc/articles/PMC8065727/ /pubmed/33805267 http://dx.doi.org/10.3390/nano11040866 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Article
Strokova, Valeria
Gubareva, Ekaterina
Ogurtsova, Yulia
Fediuk, Roman
Zhao, Piqi
Vatin, Nikolai
Vasilev, Yuriy
Obtaining and Properties of a Photocatalytic Composite Material of the “SiO(2)–TiO(2)” System Based on Various Types of Silica Raw Materials
title Obtaining and Properties of a Photocatalytic Composite Material of the “SiO(2)–TiO(2)” System Based on Various Types of Silica Raw Materials
title_full Obtaining and Properties of a Photocatalytic Composite Material of the “SiO(2)–TiO(2)” System Based on Various Types of Silica Raw Materials
title_fullStr Obtaining and Properties of a Photocatalytic Composite Material of the “SiO(2)–TiO(2)” System Based on Various Types of Silica Raw Materials
title_full_unstemmed Obtaining and Properties of a Photocatalytic Composite Material of the “SiO(2)–TiO(2)” System Based on Various Types of Silica Raw Materials
title_short Obtaining and Properties of a Photocatalytic Composite Material of the “SiO(2)–TiO(2)” System Based on Various Types of Silica Raw Materials
title_sort obtaining and properties of a photocatalytic composite material of the “sio(2)–tio(2)” system based on various types of silica raw materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8065727/
https://www.ncbi.nlm.nih.gov/pubmed/33805267
http://dx.doi.org/10.3390/nano11040866
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