Determination of the Tolman Length in the improved Derjaguin-Broekhoff-de Boer theory for capillary condensation of ethanol in mesoporous thin films by ellipsometric porosimetry Научная публикация
Журнал |
Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093 |
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Вых. Данные | Год: 2009, Том: 123, Номер: 1-3, Страницы: 243-252 Страниц : 10 DOI: 10.1016/j.micromeso.2009.04.006 | ||||
Ключевые слова | Derjaguin-Broekhoff-de Boer model, Ellipsometric porosimetry, Mesoporous films, Pore size distribution, Tolman parameter | ||||
Авторы |
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Организации |
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Информация о финансировании (1)
1 | Netherlands Organisation for Scientific Research | 047.017.028 |
Реферат:
Ethanol adsorption–desorption isotherms on well-organized mesoporous silica and titania films with hexagonal pores structure were studied by ellipsometric porosimetry. The mesopore volume was calculated from the change of the effective refractive index at the end points of the isotherm. An improved Derjaguin–Broekhoff–de Boer (IDBdB) model for cylindrical pores is proposed for the determination of the pore size. In this model, the disjoining pressure isotherms were obtained by measuring the thickness of the ethanol film on a non-porous film with the same chemical composition. This approach eliminates uncertainties related to the application of the statistical film thickness determined via t-plots in previous versions of the DBdB model. The deviation in the surface tension of ethanol in the mesopores from that of a flat interface was described by the Tolman parameter in the Gibbs–Tolman–Koening–Buff equation. A positive value of the Tolman parameter of 0.2 nm was found from the fitting of the desorption branch of the isotherms to the experimental data obtained by Low Angle X-ray Diffraction (LA-XRD) and Transmission Electron Microscopy (TEM) measurements in the range of pore diameters between 2.1 and 8.3 nm.
Библиографическая ссылка:
Protasova L.N.
, Rebrov E.V.
, Ismagilov Z.R.
, Schouten J.C.
Determination of the Tolman Length in the improved Derjaguin-Broekhoff-de Boer theory for capillary condensation of ethanol in mesoporous thin films by ellipsometric porosimetry
Microporous and Mesoporous Materials. 2009. V.123. N1-3. P.243-252. DOI: 10.1016/j.micromeso.2009.04.006 WOS Scopus РИНЦ
Determination of the Tolman Length in the improved Derjaguin-Broekhoff-de Boer theory for capillary condensation of ethanol in mesoporous thin films by ellipsometric porosimetry
Microporous and Mesoporous Materials. 2009. V.123. N1-3. P.243-252. DOI: 10.1016/j.micromeso.2009.04.006 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 9 дек. 2008 г. |
Принята к публикации: | 2 апр. 2009 г. |
Опубликована online: | 8 апр. 2009 г. |
Опубликована в печати: | 1 июл. 2009 г. |
Идентификаторы БД:
Web of science | WOS:000267099000030 |
Scopus | 2-s2.0-66149160157 |
РИНЦ | 13610645 |
Chemical Abstracts | 2009:640084 |
Chemical Abstracts (print) | 151:323056 |
OpenAlex | W2141269997 |