S. A. Kuznetsova, O. S. Khalipova, A. N. Shamsutdinova
{"title":"Strengthening of Spherical V2O5/TiO2−SiO2 Composites Obtained by Template Synthesis Combined with Sol-Gel Method","authors":"S. A. Kuznetsova, O. S. Khalipova, A. N. Shamsutdinova","doi":"10.1134/s0036023624700529","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This study is devoted to the preparation of strong spherical V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub>–SiO<sub>2</sub> composite by a combined template and sol-gel method. The composition, size, and shape of the colloidal particles in butanol sol with tetrabutoxytitanium and tetraethoxysilane have been determined. The physicochemical processes leading to the strengthening of the spherical agglomerates obtained using an anion exchanger with a gel structure have been established. Electrophoresis, small-angle X-ray scattering, and viscometry have been used to demonstrate the presence of positively charged colloidal particles of lenticular and cylindrical shape in the sol. The size of the particles, when the sol is stabilized, reaches 53 Å. The absorption of the sol by the anion exchanger in vanadium form is due to the equalization of the osmotic pressure in the anion exchanger/sol system. Spherical composites with a diameter of 300 µm have been obtained. It has been shown by X-ray powder diffraction that the composites consist of V<sub>2</sub>O<sub>5</sub> with an orthorhombic structure, TiO<sub>2</sub> with an anatase structure, and amorphous silicon dioxide. The interaction at the interface between the phases of V<sub>2</sub>O<sub>5</sub> with TiO<sub>2</sub> and SiO<sub>2</sub> has been demonstrated by IR and Raman spectroscopy. This interaction leads to the strengthening of the sphere of the V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub>–SiO<sub>2</sub> composite. The results obtained can be used for the synthesis of the spherical M<sub><i>x</i></sub>O<sub><i>y</i></sub>/TiO<sub>2</sub>–SiO<sub>2</sub> composites.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8000,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1134/s0036023624700529","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
This study is devoted to the preparation of strong spherical V2O5/TiO2–SiO2 composite by a combined template and sol-gel method. The composition, size, and shape of the colloidal particles in butanol sol with tetrabutoxytitanium and tetraethoxysilane have been determined. The physicochemical processes leading to the strengthening of the spherical agglomerates obtained using an anion exchanger with a gel structure have been established. Electrophoresis, small-angle X-ray scattering, and viscometry have been used to demonstrate the presence of positively charged colloidal particles of lenticular and cylindrical shape in the sol. The size of the particles, when the sol is stabilized, reaches 53 Å. The absorption of the sol by the anion exchanger in vanadium form is due to the equalization of the osmotic pressure in the anion exchanger/sol system. Spherical composites with a diameter of 300 µm have been obtained. It has been shown by X-ray powder diffraction that the composites consist of V2O5 with an orthorhombic structure, TiO2 with an anatase structure, and amorphous silicon dioxide. The interaction at the interface between the phases of V2O5 with TiO2 and SiO2 has been demonstrated by IR and Raman spectroscopy. This interaction leads to the strengthening of the sphere of the V2O5/TiO2–SiO2 composite. The results obtained can be used for the synthesis of the spherical MxOy/TiO2–SiO2 composites.
期刊介绍：
Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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