Study of MgO Transformation into MgF2 in the Presence of CF2Cl2 | Sciact - CRIS-система Института катализа

Study of MgO Transformation into MgF2 in the Presence of CF2Cl2 Научная публикация

Журнал

Journal of the Serbian Chemical Society
ISSN: 0352-5139 , E-ISSN: 1820-7421

Вых. Данные

Год: 2017, Том: 82, Номер: 5, Страницы: 523-538 Страниц : 16 DOI: 10.2298/JSC161020037V

Ключевые слова

Acid sites, Aerogels, Destructive sorption, Freon-12, Spin probe, Vanadium

Авторы

Vedyagin Aleksey A. ^1,2 , Bedilo Alexander F. ^1,3 , Mishakov Ilya V. ^1,2 , Shuvarakova Ekaterina I. ^1,3

Организации

1	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2	National Research Tomsk Polytechnic University, Tomsk, Russia
3	Novosibirsk Institute of Technology, Moscow State University of Design and Technology, Novosibirsk, Russia

Информация о финансировании (2)

1	Российский фонд фундаментальных исследований	15-03-08070
2	Федеральное агентство научных организаций России	0303-2016-0014

Alkaline-earth metal oxide aerogels prepared by sol–gel method followed by autoclave drying are nanocrystalline mesoporous materials with high reactivity. Bulk solid-state reaction of MgO aerogels with CF2Cl2 takes place after a long induction period, during which the active sites are accumulated on the surface of the nanoparticles. It was found that vanadium addition has a promoting effect on this reaction accelerating the process of the active sites formation. A method for characterization of electron-acceptor sites by electron spin resonance spectroscopy using perylene as the spin probe was developed. A good correlation was observed between the rate of the CF2Cl2 destructive sorption and the concentration of weak electron-acceptor sites. Simplified models of such sites were suggested. The acid sites on the modified MgO surface were supposed to be originated from separation of the charged fragments resulting in the surface polarization. Uncompensated oxygen substitution for chlorine and/or fluorine ions leads to appearance of Lewis acid sites while HCl/HF chemisorption results in Bronsted acid sites formation.

Vedyagin A.A. , Bedilo A.F. , Mishakov I.V. , Shuvarakova E.I.
Study of MgO Transformation into MgF2 in the Presence of CF2Cl2

Journal of the Serbian Chemical Society. 2017. V.82. N5. P.523-538. DOI: 10.2298/JSC161020037V WOS Scopus РИНЦ CAPlus OpenAlex

Полный текст от издателя

Поступила в редакцию:	20 нояб. 2016 г.
Принята к публикации:	10 мар. 2017 г.

Web of science:	WOS:000408085400005
Scopus:	2-s2.0-85021730275
РИНЦ:	31032296
Chemical Abstracts:	2017:1754066
OpenAlex:	W2604169763

БД	Цитирований
Web of science	8
Scopus	11
РИНЦ	12
OpenAlex	10