Mesoporous Aerogel-Like Al-Si Oxides Obtained via Supercritical Antisolvent Precipitation of Alumina and Silica Sols Научная публикация
| Журнал |
The Journal of Supercritical Fluids
ISSN: 0896-8446 , E-ISSN: 1872-8162 |
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| Вых. Данные | Год: 2019, Том: 149, Страницы: 110-119 Страниц : 10 DOI: 10.1016/j.supflu.2019.03.014 | ||||
| Ключевые слова | Alumina-silica mesoporous alumina; supercritical antisolvent; sols; acidity; SAS | ||||
| Авторы |
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| Организации |
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Информация о финансировании (2)
| 1 | Российский фонд фундаментальных исследований | 18-29-06022 |
| 2 | Федеральное агентство научных организаций России | 0303-2016-0001 |
Реферат:
A method of alumina and silica sols precipitation in supercritical CO2 has been developed for the first time to prepare alumina and silica doped alumina. The silicon content of samples is varied within the range from 0 to 30 mol. %. The approach suggested can be considered as a development of supercritical antisolvent (SAS) method that is widely used to prepare powders from solutions but not sols. The alumina and silicon-doped alumina obtained are shown to be mesoporous materials with narrow size distribution in the range of 3-5 nm. The high-temperature treatment of the sample containing 10 mol. % of Si results in the formation of γ-Al2O3 phase followed by its transition into the δ-Al2O3 phase at 1200 °C without α-Al2O3 phase formation. It is demonstrated that the gradual introduction of silica into the alumina allows one to fine-tune the strength and amount of acid sites existing in oxides.
Библиографическая ссылка:
Nesterov N.S.
, Shalygin A.S.
, Pakharukova V.P.
, Glazneva T.S.
, Martyanov O.N.
Mesoporous Aerogel-Like Al-Si Oxides Obtained via Supercritical Antisolvent Precipitation of Alumina and Silica Sols
The Journal of Supercritical Fluids. 2019. V.149. P.110-119. DOI: 10.1016/j.supflu.2019.03.014 WOS Scopus РИНЦ OpenAlex CAPlus
Mesoporous Aerogel-Like Al-Si Oxides Obtained via Supercritical Antisolvent Precipitation of Alumina and Silica Sols
The Journal of Supercritical Fluids. 2019. V.149. P.110-119. DOI: 10.1016/j.supflu.2019.03.014 WOS Scopus РИНЦ OpenAlex CAPlus
Даты:
| Поступила в редакцию: | 28 нояб. 2018 г. |
| Принята к публикации: | 21 мар. 2019 г. |
| Опубликована online: | 30 мар. 2019 г. |
| Опубликована в печати: | 1 июл. 2019 г. |
Идентификаторы БД:
| ≡ Web of science: | WOS:000468707500013 |
| ≡ Scopus: | 2-s2.0-85064166327 |
| ≡ РИНЦ: | 38696748 |
| ≡ OpenAlex: | W2928247421 |
| ≡ Chemical Abstracts: | 2019:743432 |