Porous structure of PEG-mediated silica controlled by solution pH Научная публикация
| Журнал |
Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093 |
||
|---|---|---|---|
| Вых. Данные | Год: 2020, Том: 307, Страницы: 110468 Страниц : 5 DOI: 10.1016/j.micromeso.2020.110468 | ||
| Ключевые слова | Sol-gel, Silica, PEG, pH, Structure-directing agent | ||
| Авторы |
|
||
| Организации |
|
Информация о финансировании (1)
| 1 | Министерство науки и высшего образования Российской Федерации | V. 47 |
Реферат:
This paper continues our previous study of porous amorphous silica prepared by the sol-gel method using polyethylene glycol (PEG) as structure-directing agent [O.V. Gorbunova et al., Microporous and Mesoporous Materials 190 (2014) 146–151]. Here we analyze the effect of acidic pH on the porous structure of silica synthesized with PEG. The results of adsorption studies and 29Si NMR spectroscopy data allow us to declare the possibility of tuning the porous structure of the amorphous silica materials exploiting the PEG concentration and pH of the growth solution. Our results reveal that a gradual increase of the solution pH in the presence of PEG initiates the growth of specific surface area, specific mesopore volume and average pore size. We found that PEG makes it possible to obtain microporous silica materials in the pH region of stable sols (from 1 to 3). When pH is in the range from 4 to 5, micro-mesoporous materials with pore size less than 4 nm are formed.
Библиографическая ссылка:
Gorbunova O.V.
, Baklanova O.N.
, Gulyaeva T.I.
Porous structure of PEG-mediated silica controlled by solution pH
Microporous and Mesoporous Materials. 2020. V.307. P.110468. DOI: 10.1016/j.micromeso.2020.110468 WOS Scopus РИНЦ OpenAlex
Porous structure of PEG-mediated silica controlled by solution pH
Microporous and Mesoporous Materials. 2020. V.307. P.110468. DOI: 10.1016/j.micromeso.2020.110468 WOS Scopus РИНЦ OpenAlex
Даты:
| Поступила в редакцию: | 3 мая 2020 г. |
| Принята к публикации: | 5 июл. 2020 г. |
| Опубликована online: | 24 июл. 2020 г. |
| Опубликована в печати: | 1 нояб. 2020 г. |
Идентификаторы БД:
| Web of science: | WOS:000572431000009 |
| Scopus: | 2-s2.0-85089009365 |
| РИНЦ: | 45385238 |
| OpenAlex: | W3044616806 |