Particle and Aerosol Research Vol. 4, No. 2, December 2008 |
ISSN : 1738-8716 (Print) ISSN : 2287-8130 (Online) |
The growth of zinc oxide particles by coagulation in aerosol reactor
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Abstracts
Nanosize ZnO particles were prepared by oxidation of zinc vapor and the particle growth was modeled by a
coagulation model by assuming that the characteristic time for reaction was much shorter than coagulation time
and residence time (¥óreaction⁄⁄¥ócoagulation⁄⁄¥óresidence). Experimental measurement of zinc oxide particles diameter was
consistent with the predicted result from the coagulation model. For practical purpose of predicting zinc oxide size
in areosol reactor, the constant kernel solution is concluded to be sufficient, Uniqueness of nano-scale property of
zinc oxide was confirmed by the higher photocatalytic activity of zinc oxide than nanosize titania particles.
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