Self-stabilization of aqueous suspensions of alumina nanoparticles obtained by electrical explosion / Safronov A. P.,Kalinina E. G.,Smirnova T. A.,Leiman D. V.,Bagazeev A. V. // RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A. - 2010. - V. 84, l. 12. - P. 2122-2127.

ISSN/EISSN:

0036-0244 / нет данных

Type:

Article

Abstract:

The particle-size distribution, electrooptical potential, and acid properties of the surface of Al(2)O(3) nanoparticles in aqueous media were studied by dynamic light scattering, electroacoustic spectral analysis, and potentiometric titration. The nanopowder with the mean particle size 22 nm was obtained by the oxidation of aluminum wire in the vapor phase using electrical explosion in oxygen-argon mixture. In spite of the presence of aggregates, aqueous suspensions of nanoparticles, as distinct from suspensions of micropowders, are stable without the addition of special stabilizers because of the spontaneous formation of a double electrical layer on their surface, the electrokinetic potential of which is positive and exceeds 30 mV. The most probable reason for electrostatic self-stabilization of suspensions of nanopowders is the adsorption of Al ions formed in the hydrolysis of aluminum nitrates, small amounts of which are produced in electrical discharges during preparation.

Author keywords:

CITRIC-ACID; DISPERSANT

DOI:

10.1134/S0036024410120204

Web of Science ID:

ISI:000284775000020

Соавторы в МНС:

—

Другие поля

Поле	Значение
Month	DEC
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	CITRIC-ACID; DISPERSANT
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
Author-Email	safronov@iep.uran.ru
ResearcherID-Numbers	Kalinina, Elena/F-1587-2017 Bagazeev, Aleksey/H-6011-2017
ORCID-Numbers	Kalinina, Elena/0000-0002-5637-7451 Bagazeev, Aleksey/0000-0002-9112-5954
Funding-Acknowledgement	Russian Foundation for Basic Research {[}08-02-99076]; Federal Special-Purpose Program {[}AVTsP-211-1535]
Funding-Text	The authors thank Yu.A. Kotov for fruitful discussions. This work was financially supported by the Russian Foundation for Basic Research (project no. 08-02-99076) and Federal Special-Purpose Program (AVTsP-211-1535).
Number-of-Cited-References	9
Usage-Count-Since-2013	3
Journal-ISO	Russ. J. Phys. Chem. A
Doc-Delivery-Number	687JO