TiO2 particles formation during hydrolysis and thermohydrolysis of TICL4 aqueous-alcoholic solutions
The relevance. Titanium dioxide is obtained by flaming synthesis from organooil mediums technology. At the initial stage of that technology during TiCl 4 aqueous-alcoholic solution preparing and dispersion at 100 °C or less TiCl 4 hydrolysis is occurred with intermedi-ate products formation Ti (OH)...
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2018-06-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
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| Online Access: | http://izvestiya.tpu.ru/archive/article/view/2045 |
| _version_ | 1797813163648876544 |
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| author | Vladimir Zotovich Poylov Alexander Leonidovich Kazantsev |
| author_facet | Vladimir Zotovich Poylov Alexander Leonidovich Kazantsev |
| author_sort | Vladimir Zotovich Poylov |
| collection | DOAJ |
| description | The relevance. Titanium dioxide is obtained by flaming synthesis from organooil mediums technology. At the initial stage of that technology during TiCl 4 aqueous-alcoholic solution preparing and dispersion at 100 °C or less TiCl 4 hydrolysis is occurred with intermedi-ate products formation Ti (OH) x Cl y having variable composition. Hereinafter at higher temperatures and smaller residence time in synthesis reactor the intermediate products of hydrolysis are transformed in titanium dioxide. TiO 2 characteristics depend on conditions of TiCl 4 hydrolysis and thermohydrolysis implementation in solution and flame. In this regard determination of possibility of controlling TiO 2 particle sizes at hydrolysis and high temperature synthesis owing to regulating TiCl 4 structure in aqueous-alcoholic mediums is of great scientific and practical interest. The main aim is to study the formation of titanium tetrachloride hydrolysis product particles in aqueous-alcoholic solutions of ethanol, isopropanol and butanol to the sputtering stage at temperature up to 100 °C and titanium dioxide particles in thermohydrolysis at combustion of aqueous-alcoholic solutions at temperature higher than 780 °C. Objects: organo-mineral solutions of titanium tetrachloride and products of their hydrolysis, formed at temperatures up to 100 °C and at combustion of water-alcohol solutions in a flame at temperatures above 780 °C. Methods: dynamic light dispersion for analyzing the sizes of TiCl 4 hydrolysis products in aqueous-alcoholic solution of ethanol, butanol, isopropanol; oscillatory viscometry and the Du-Nuits method for estimating dynamic viscosity and surface tension of the studied solutions; optical microscopy for measuring solution drop sizes; electron microscopy of TiO 2 flaming synthesis products. Results. The study identified that titanium tetrachloride hydrolysis products particles size depends on alcohol nature and particle grow in three stages: initial particle formation - micelles formation - agglomerates. It is experimentally possible to regulate residual chlorine, the shape and size of generated titanium dioxide particles through regulating the precursor composition and temperature at the ther-mohydrolysis stage. The usage of isopropanol and butanol contributes to thermohydrolysis temperature growth and to ultrafine particle formation. |
| first_indexed | 2024-03-13T07:49:19Z |
| format | Article |
| id | doaj.art-b4e686428f8746ff84d3f028afcd1c7d |
| institution | Directory Open Access Journal |
| issn | 2500-1019 2413-1830 |
| language | Russian |
| last_indexed | 2024-03-13T07:49:19Z |
| publishDate | 2018-06-01 |
| publisher | Tomsk Polytechnic University |
| record_format | Article |
| series | Известия Томского политехнического университета: Инжиниринг георесурсов |
| spelling | doaj.art-b4e686428f8746ff84d3f028afcd1c7d2023-06-02T21:10:22ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302018-06-013296TiO2 particles formation during hydrolysis and thermohydrolysis of TICL4 aqueous-alcoholic solutionsVladimir Zotovich PoylovAlexander Leonidovich KazantsevThe relevance. Titanium dioxide is obtained by flaming synthesis from organooil mediums technology. At the initial stage of that technology during TiCl 4 aqueous-alcoholic solution preparing and dispersion at 100 °C or less TiCl 4 hydrolysis is occurred with intermedi-ate products formation Ti (OH) x Cl y having variable composition. Hereinafter at higher temperatures and smaller residence time in synthesis reactor the intermediate products of hydrolysis are transformed in titanium dioxide. TiO 2 characteristics depend on conditions of TiCl 4 hydrolysis and thermohydrolysis implementation in solution and flame. In this regard determination of possibility of controlling TiO 2 particle sizes at hydrolysis and high temperature synthesis owing to regulating TiCl 4 structure in aqueous-alcoholic mediums is of great scientific and practical interest. The main aim is to study the formation of titanium tetrachloride hydrolysis product particles in aqueous-alcoholic solutions of ethanol, isopropanol and butanol to the sputtering stage at temperature up to 100 °C and titanium dioxide particles in thermohydrolysis at combustion of aqueous-alcoholic solutions at temperature higher than 780 °C. Objects: organo-mineral solutions of titanium tetrachloride and products of their hydrolysis, formed at temperatures up to 100 °C and at combustion of water-alcohol solutions in a flame at temperatures above 780 °C. Methods: dynamic light dispersion for analyzing the sizes of TiCl 4 hydrolysis products in aqueous-alcoholic solution of ethanol, butanol, isopropanol; oscillatory viscometry and the Du-Nuits method for estimating dynamic viscosity and surface tension of the studied solutions; optical microscopy for measuring solution drop sizes; electron microscopy of TiO 2 flaming synthesis products. Results. The study identified that titanium tetrachloride hydrolysis products particles size depends on alcohol nature and particle grow in three stages: initial particle formation - micelles formation - agglomerates. It is experimentally possible to regulate residual chlorine, the shape and size of generated titanium dioxide particles through regulating the precursor composition and temperature at the ther-mohydrolysis stage. The usage of isopropanol and butanol contributes to thermohydrolysis temperature growth and to ultrafine particle formation.http://izvestiya.tpu.ru/archive/article/view/2045hydrolysisthermohydrolysisaqueous-alcoholic solutionstitanium tetrachloridetitanium dioxideultrafine particles and nanoparticles |
| spellingShingle | Vladimir Zotovich Poylov Alexander Leonidovich Kazantsev TiO2 particles formation during hydrolysis and thermohydrolysis of TICL4 aqueous-alcoholic solutions Известия Томского политехнического университета: Инжиниринг георесурсов hydrolysis thermohydrolysis aqueous-alcoholic solutions titanium tetrachloride titanium dioxide ultrafine particles and nanoparticles |
| title | TiO2 particles formation during hydrolysis and thermohydrolysis of TICL4 aqueous-alcoholic solutions |
| title_full | TiO2 particles formation during hydrolysis and thermohydrolysis of TICL4 aqueous-alcoholic solutions |
| title_fullStr | TiO2 particles formation during hydrolysis and thermohydrolysis of TICL4 aqueous-alcoholic solutions |
| title_full_unstemmed | TiO2 particles formation during hydrolysis and thermohydrolysis of TICL4 aqueous-alcoholic solutions |
| title_short | TiO2 particles formation during hydrolysis and thermohydrolysis of TICL4 aqueous-alcoholic solutions |
| title_sort | tio2 particles formation during hydrolysis and thermohydrolysis of ticl4 aqueous alcoholic solutions |
| topic | hydrolysis thermohydrolysis aqueous-alcoholic solutions titanium tetrachloride titanium dioxide ultrafine particles and nanoparticles |
| url | http://izvestiya.tpu.ru/archive/article/view/2045 |
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