Abstract: In this work, the oxide nanopowders of Al2O3, ZrO2, Y2O3, Gd2O3, CeO2, and SiO2 were synthesized by CW CO2 laser vaporization technique with controlled gas condensation in an inert atmosphere. Methods for controlling the size of the resulting nanoparticles by adjusting the gas composition and pressure during the vaporization process have been demonstrated. The potential for producing ultrasmall oxide nanoparticles with dimensions less than 5 nm has been shown. The size distribution of nanoparticles taken from different parts of the evaporation-condensation tract was studied using scanning (SEM) and transmission (TEM) electron microscopy methods. The effect of synthesis conditions (pressure and composition of the inert gas) on characteristics of the nanoparticles is discussed. Using a wide class of simple oxides as the example, it is shown that the powders synthesized by the laser method consist of three types of particles: target spherical particles with a diameter of 3–20 nm (more than 98%), larger spherical particles with a diameter of 50–200 nm, and shapeless large particles with sizes more than 200 nm. The possibility of separating large particles from the main particles using the original labyrinth system for gas pumping is shown. The obtained particles with controlled sizes can be effectively used in various applications, in particular, for the preparation of catalysts and adsorbents.

Cite: Kostyukov A.I. , Markelova T.V. , Nashivochnikov A.A. , Snytnikov V.N. , Suprun E.A. , Snytnikov V.N.
Laser Synthesis of Oxide Nanoparticles with Controlled Gas Condensation
Journal of Aerosol Science. 2024. V.181. 106434 :1-12. DOI: 10.1016/j.jaerosci.2024.106434 WOS Scopus AN OpenAlex

Dates:

Submitted:	Mar 15, 2024
Accepted:	Jul 8, 2024
Published online:	Jul 10, 2024
Published print:	Sep 9, 2024

Identifiers:

Web of science:	WOS:001271764800001
Scopus:	2-s2.0-85198249815
Chemical Abstracts:	2024:1562769
OpenAlex:	W4400485961

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