Quantitative IR-Spectroscopic Study of the Protonic Acidity of Native Aluminosilicates Научная публикация
Журнал |
Journal of Applied Chemistry of the USSR (after 1983 - Russian Journal of Applied Chemistry)
ISSN: 0021-888X |
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Вых. Данные | Год: 1991, Том: 64, Номер: 12 pt 2, Страницы: 2464-2467 Страниц : 4 | ||
Ключевые слова | BASE PROPERTIES | ||
Авторы |
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Организации |
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Реферат:
The surface acidity of cation-exchanged forms of kaolinite (Kt) was quantitatively detected from the IR spectra of pyridine adsorbed on the surface acid centers. The relative concentration of proton centers was detected according to the integral intensity of the 1540 cm-1 stretching band, the content of Broensted acid centers was calculated by the relation CB = 10 3 /(A0φ), where A is the observed integral absorption and φ is the density of the pressed Kt tablet. The CB values decreased with increase in the temperature at which the tablet was heated in vacuo (423, 523, and 673 K) prior to the pyridine adsorption; the decrease is related to surface dehydration and the dehydroxylation (at 673 K) of the Kt aluminosilicate framework. The concentration of proton centers was different for the various cation-exchanged forms, with increases in concentration according to exchange-cation followed the order Ca2+ > Sr2+ > Ba2+. The concentration of B-centers was similar in the Mg2+- and Al3+-exchanged forms and was lower in these 2 forms than in the Ca2+- and Sr2+-exchanged Kt.
Библиографическая ссылка:
Taranukhina L.D.
, Paukshtis E.A.
, Goncharuk V.V.
Quantitative IR-Spectroscopic Study of the Protonic Acidity of Native Aluminosilicates
Journal of Applied Chemistry of the USSR (after 1983 - Russian Journal of Applied Chemistry). 1991. V.64. N12 pt 2. P.2464-2467. WOS
Quantitative IR-Spectroscopic Study of the Protonic Acidity of Native Aluminosilicates
Journal of Applied Chemistry of the USSR (after 1983 - Russian Journal of Applied Chemistry). 1991. V.64. N12 pt 2. P.2464-2467. WOS
Оригинальная:
Таранухина Л.Д.
, Паукштис Е.А.
, Гончарук В.В.
Количественное исследование протонной кислотности природных алюмосиликатов методом ИК спектроскопии
Журнал прикладной химии. 1991. Т.64. №12. С.2633-2636. РИНЦ
Количественное исследование протонной кислотности природных алюмосиликатов методом ИК спектроскопии
Журнал прикладной химии. 1991. Т.64. №12. С.2633-2636. РИНЦ
Даты:
Поступила в редакцию: | 16 авг. 1990 г. |
Опубликована в печати: | 1 дек. 1991 г. |
Идентификаторы БД:
Web of science | WOS:A1991JH98500008 |
Цитирование в БД:
Пока нет цитирований