Template-based approach in the preparation of nanoporous silicas and titania-silicas
Mesoporous silicas and titania-silicas were synthesized with use as a template quaternary ammonium salts and their hydroxides. Fumed silica, tetraethyl orthosilicate and titanium(IV) tetraisopropoxide were applied as presursors. Syntheses were carried out in presence HCl and NH4OH. Mesoporous titani...
Збережено в:
| Дата: | 2001 |
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| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2001
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| Онлайн доступ: | https://surfacezbir.com.ua/index.php/surface/article/view/48 |
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| Назва журналу: | Surface |
| Завантажити файл: |  |
Репозитарії
Surface| Резюме: | Mesoporous silicas and titania-silicas were synthesized with use as a template quaternary ammonium salts and their hydroxides. Fumed silica, tetraethyl orthosilicate and titanium(IV) tetraisopropoxide were applied as presursors. Syntheses were carried out in presence HCl and NH4OH. Mesoporous titania-silicas with TiO2 contents from 1 up to 70 mol. % were prepared. Obtained samples have been characterized by the powder X-ray diffraction data and nitrogen adsorption at 77 K. Specific surface area, total pore volume, pore volume and area distribution were determined from nitrogen adsorption isotherm for synthesized titania-silicas. It was demonstrated that the ordered structures of MCM-41 type and bimodal porous materials with maximum pore diameter of 3 and 30 nm may be prepared depending of a synthesis conditions and a precursor nature. |
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