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Generation of silver/palladium nanoparticles by liquid flame spray

Published online by Cambridge University Press:  03 March 2011

H. Keskinen ,
J.M. Mäkelä ,
M. Vippola ,
M. Nurminen ,
J. Liimatainen ,
T. Lepistö  and
J. Keskinen
H. Keskinen*
Affiliation:
Aerosol Physics Laboratory, Institute of Physics, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland
J.M. Mäkelä
Affiliation:
Aerosol Physics Laboratory, Institute of Physics, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland
M. Vippola
Affiliation:
Institute of Material Science, Tampere University of Technology, P.O. Box 589, FIN-33101 Tampere, Finland
M. Nurminen
Affiliation:
Aerosol Physics Laboratory, Institute of Physics, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland
J. Liimatainen
Affiliation:
Aerosol Physics Laboratory, Institute of Physics, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland
T. Lepistö
Affiliation:
Institute of Material Science, Tampere University of Technology, P.O. Box 589, FIN-33101 Tampere, Finland
J. Keskinen
Affiliation:
Aerosol Physics Laboratory, Institute of Physics, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland
*
a)Address all correspondence to this author. e-mail: helmi.keskinen@tut.fi
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Abstract

Ag–Pd alloy nanoparticles have been generated from silver and palladium nitrate precursors using a high temperature aerosol method, the liquid flame spray (LFS) process. In the LFS process, a spray aerosol of precursor liquid is introduced into a high-temperature H2–O2 flame. The primary micron-sized spray droplets evaporatein the flame, and the final particulate product is a result of the nucleation of the pure metal vapors shortly after the flame. In the study, three Ag–Pd molar ratios—10:90, 50:50, and 90:10—were used in the precursor. As a result of the synthesis, metalalloy nanoparticles with practically the same concentration ratios, correspondingly, were produced with the method. In the experiments, metal mass flow rates of 0.01–0.8 g/min were covered. The size of the particles was determined to be in the rangeof 10–50 nm by aerosol instrumentation. The particles were spherical and slightly agglomerated. It was concluded that the particle size can be controlled via the total precursor mass flow rate, and the composition can be controlled by the molar ratio of Ag and Pd compounds in the precursor liquid.

Keywords

NanoparticleFlame synthesisMetal alloy
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 5 , May 2004 , pp. 1544 - 1550
Copyright
Copyright © Materials Research Society 2004

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