The Synthesis and Studies of Crystal/Local Structures and Morphology of Hydrated Molybdenum Oxides | Sciact - CRIS-система Института катализа

The Synthesis and Studies of Crystal/Local Structures and Morphology of Hydrated Molybdenum Oxides Научная публикация

Журнал

Journal of Solid State Chemistry
ISSN: 0022-4596 , E-ISSN: 1095-726X

Вых. Данные

Год: 2021, Том: 301, Номер статьи : 122356, Страниц : 11 DOI: 10.1016/j.jssc.2021.122356

Ключевые слова

Hydrated MoO3, X-ray diffraction, X-ray absorption spectroscopy, Scanning Electron Microscopy, Raman spectroscopy, IR spectroscopy

Авторы

Popov V.V. ^1,2 , Menushenkov A.P. ¹ , Yastrebtsev A.A. ¹ , Molokova A.Yu. ¹ , Pisarev A.A. ¹ , Khramov E.V. ² , Zubavichus Y.V. ³ , Shchetinin I.V. ⁴ , Ponkratov K.V. ⁵ , Tsarenko N.A. ⁶ , Ognevskaya N.V. ⁶

Организации

1	National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31, Kashirskoe Hwy., Moscow, 115409, Russia
2	National Research Center "Kurchatov Institute", 1, Akademika Kurchatova Sq., Moscow, 123182, Russia
3	Boreskov Institute of Catalysis SB RAS, 5, Lavrentiev Ave., Novosibirsk, Russia, 630090
4	National University of Science and Technology MISiS, 4, Leninskii Ave., Moscow, 119049, Russia
5	Renishaw Russia, 58, Kantemirovskaya Str., 115477, Moscow, Russia
6	JSC Scientific Research Institute of Chemical Engineering, 33, Kashirskoe Hwy., Moscow, 115409, Russia

Информация о финансировании (3)

1	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	0239-2021-0002
2	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	FSWU-2020-0035
3	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	0718-2020-0037

The crystal/local structure and morphology of hydrated molybdenum oxides particles obtained by acidic precipitation of molybdates solutions were studied using X-ray diffraction, X-ray absorption spectroscopy, scanning electron microscopy, Raman and IR spectroscopy. The precipitation of ammonium heptamolybdate solutions (pH = 1.00) at room temperature result in the formation of poorly crystallized hydrated molybdenum oxides. At the same time, acidification of the sodium molybdate solutions does not lead to the appearance of precipitates for several days. Heating to 90° C and aging the reaction suspension prepared from both ammonium heptamolybdate and sodium molybdate results in the formation of prismatic h-MoO3 particles with the hexagonal crystal structure. It was shown that distorted octahedra MoO6 are the basic structural units in the formed hydrated molybdenum oxides. Along with the presence of Mo=O and Mo-O bonds, the presence of water molecules, hydroxyl ions, and (or Na+) ions was detected in the structure of hydrated MoO3. The type of Mo salt and acid significantly affects the morphology of h-MoO3 particles. Large h-MoO3 particles are formed by aggregation of small ones and Ostwald ripening due to the ”dissolution - precipitation” process.

Popov V.V. , Menushenkov A.P. , Yastrebtsev A.A. , Molokova A.Y. , Pisarev A.A. , Khramov E.V. , Zubavichus Y.V. , Shchetinin I.V. , Ponkratov K.V. , Tsarenko N.A. , Ognevskaya N.V.
The Synthesis and Studies of Crystal/Local Structures and Morphology of Hydrated Molybdenum Oxides
Journal of Solid State Chemistry. 2021. V.301. 122356 :1-11. DOI: 10.1016/j.jssc.2021.122356 WOS Scopus РИНЦ CAPlus OpenAlex

Поступила в редакцию:	15 февр. 2021 г.
Принята к публикации:	13 июн. 2021 г.
Опубликована online:	18 июн. 2021 г.
Опубликована в печати:	1 сент. 2021 г.

Web of science:	WOS:000684543700041
Scopus:	2-s2.0-85108446654
РИНЦ:	46906100
Chemical Abstracts:	2021:1412807
OpenAlex:	W3176084994

БД	Цитирований
Scopus	11
Web of science	10
РИНЦ	5
OpenAlex	12