SYNTHESIS OF NANOSIZED METALLIC AND CORE-SHELL PARTICLES BY ULTRASONIC SPRAY PYROLYSIS

Abstract

Ultrasonic spray pyrolysis is a versatile method for preparation of powders of metals, oxides and composites. Nanoparticles of silver were prepared by ultrasonic spray pyrolysis in a horizontal and vertical reactor. Direct synthesis of RuO2-TiO2 nanoparticles with core and shell structure was investigated in a vertical reactor. An influence of reaction parameters (the temperature, the residence time, the concentration of solution, and the ultrasonic frequency) on the morphological characteristics of prepared nanoparticles was studied. Using the ultrasonic spray pyrolysis, the ideally spherical metallic particles were obtained at temperatures below the melting point of metals. Scale up of the ultrasonic spray pyrolysis was applied for the synthesis of nanosized silver. The coating of titanium anode was successfully performed using ultrasonic spray pyrolysis method in an electrostatic field.