The Synthesis and Studies of Crystal/Local Structures and Morphology of Hydrated Molybdenum Oxides | Sciact - CRIS-system of Boreskov Institute of Catalysis

The Synthesis and Studies of Crystal/Local Structures and Morphology of Hydrated Molybdenum Oxides Full article

Journal

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

Output data

Year: 2021, Volume: 301, Article number : 122356, Pages count : 11 DOI: 10.1016/j.jssc.2021.122356

Tags

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

Authors

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

Affiliations

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

Funding (3)

1	Ministry of Science and Higher Education of the Russian Federation	FSWU-2020-0035
2	Ministry of Science and Higher Education of the Russian Federation	0718-2020-0037
3	Ministry of Science and Higher Education of the Russian Federation	0239-2021-0002

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 AN OpenAlex

Submitted:	Feb 15, 2021
Accepted:	Jun 13, 2021
Published online:	Jun 18, 2021
Published print:	Sep 1, 2021

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

DB	Citing
Scopus	10
Web of science	8
Elibrary	5
OpenAlex	8