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Influence of the Time-Temperatur-Profile on Powder Characteristics of Nanocrystalline Anatase (TiO2) produced by Chemical Vapor Synthesis

Published online by Cambridge University Press:  01 February 2011

Ruzica Djenadic ,
Sankhanilay Roy Chowdhury ,
Marina Spasova ,
Andreas Gondorf ,
Erdal Akyildiz  and
Markus Winterer
Ruzica Djenadic
Affiliation:
ruzica.djenadic@uni-due.de, Nanoparticle Process Technology, Faculty of Engineering and Cenide, University of Duisburg-Essen, Duisburg, 47057, Germany
Sankhanilay Roy Chowdhury
Affiliation:
s.roychowdhury@uni-duisburg-essen.de, University of Duisburg-Essen, Nanoparticle Process Technology, Faculty of Engineering and Cenide, Duisburg, 47057, Germany
Marina Spasova
Affiliation:
marina.spasova@uni-due.de, University of Duisburg-Essen, Experimental Physics, Faculty of Physics and CeNIDE, Duisburg, 47057, Germany
Andreas Gondorf
Affiliation:
andreas.gondorf@uni-due.de, Experimental Physics, Faculty of Physics and CeNIDE, University of Duisburg-Essen, Duisburg, 47057, Germany
Erdal Akyildiz
Affiliation:
erdal.akyildiz@uni-due.de, Nanoparticle Process Technology, Faculty of Engineering and Cenide, University of Duisburg-Essen, Duisburg, 47057, Germany
Markus Winterer
Affiliation:
markus.winterer@uni-due.de, University of Duisburg-Essen, Nanoparticle Process Technology, Faculty of Engineering and Cenide, Duisburg, 47057, Germany
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Abstract

Chemical Vapor Synthesis (CVS) is the conversion of molecular species into nanocrystalline particles by chemical reactions in a gas flow reactor. Pure anatase nanoparticles are generated in a hot wall reactor from titanium isopropoxide using different time-temperature-profiles. The time-temperature-profile (T(t)-profile) in the gas phase of the reactor has a profound influence on the particle characteristics such as particle microstructure and surface chemistry and, therefore, on the quality of the powder consisting of nanocrystalline particles. In this study a simple reaction-coagulation-sintering model (CVSSIN) was used to predict influence of the T(t)-profile on the powder characteristics. The as-synthesized anatase powders show a very high degree of crystallinity, primary particle of about 10 nm sizes and a low degree of agglomeration.

Keywords

chemical vapor deposition (CVD) (chemical reaction)nanostructurepowder processing
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH08-07
Copyright
Copyright © Materials Research Society 2008

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