Alkaline-Earth Oxide Nanoparticles Obtained by Aerogel Methods. Characterization and Rational for Unexpectedly High Surface Chemical Reactivities Научная публикация
Журнал |
Chemistry of Materials
ISSN: 0897-4756 , E-ISSN: 1520-5002 |
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Вых. Данные | Год: 1997, Том: 9, Номер: 11, Страницы: 2468-2480 Страниц : 13 DOI: 10.1021/cm970357a | ||
Ключевые слова | MAGNESIUM-OXIDE; CALCIUM-OXIDE; CARBON-DIOXIDE; DESTRUCTIVE ADSORPTION; SULFUR-DIOXIDE; REAGENTS; PARTICLES; CATALYSTS; PYRIDINE; DECOMPOSITION | ||
Авторы |
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Организации |
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Реферат:
Aerogel preparation of MgO and CaO nanoparticles involves a sol−gel approach where methoxides are converted to hydroxide gels followed by hypercritical drying and vacuum dehydration. This produces, for these particular hydroxides/oxides, ultrafine particulates rather than monoliths. These particulate materials have exhibited unexpectedly high surface chemical reactivities that have allowed their successful use as high-capacity destructive adsorbents for toxic chemicals, including chlorocarbons, organophosphorus compounds, and acid gases. Detailed characterization involving X-ray diffraction (XRD), gas adsorption/pore distribution analysis, infrared, TEM, AFM, XPS, probe molecule adsorption, and elemental analysis has allowed a rationale to be developed that helps explain the high chemical reactivities observed, especially for CaO. Pore volume and size distribution, unusual surface morphologies with a high ratio of edge ion/surface ions, and trace residual (persistent) surface −OH and −OCH3 seem to be the main factors allowing these nanoparticulates to be isolable and stable and yet highly reactive, and results for CaO are emphasized herein.
Библиографическая ссылка:
Koper O.B.
, Lagadic I.
, Volodin A.
, Klabunde K.J.
Alkaline-Earth Oxide Nanoparticles Obtained by Aerogel Methods. Characterization and Rational for Unexpectedly High Surface Chemical Reactivities
Chemistry of Materials. 1997. V.9. N11. P.2468-2480. DOI: 10.1021/cm970357a WOS Scopus РИНЦ
Alkaline-Earth Oxide Nanoparticles Obtained by Aerogel Methods. Characterization and Rational for Unexpectedly High Surface Chemical Reactivities
Chemistry of Materials. 1997. V.9. N11. P.2468-2480. DOI: 10.1021/cm970357a WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 12 мая 1997 г. |
Принята к публикации: | 23 сент. 1997 г. |
Опубликована в печати: | 1 нояб. 1997 г. |
Идентификаторы БД:
Web of science | WOS:A1997YH44500027 |
Scopus | 2-s2.0-0000844008 |
РИНЦ | 13759087 |
Chemical Abstracts | 1997:721262 |
Chemical Abstracts (print) | 128:40033 |
OpenAlex | W2038635137 |