Generation of TiO2 Nanoparticles for Follow-Up Inhalation Experiments with Laboratory Animals

0443383 - ÚCHP 2016 RIV CZ eng C - Conference Paper (international conference)
Moravec, Pavel - Schwarz, Jaroslav - Vodička, Petr - Koštejn, Martin
Generation of TiO2 Nanoparticles for Follow-Up Inhalation Experiments with Laboratory Animals.
NANOCON 2014, 6th International Conference. Ostrava: Tanger Ltd, 2015, s. 15-20. ISBN 978-80-87294-53-6.
[NANOCON International Conference /6./. Brno (CZ), 05.11.2014-07.11.2014]
R&D Projects: GA ČR(CZ) GBP503/12/G147
Institutional support: RVO:67985858
Keywords : externally heated tube reactor * nanoparticle generation * TiO2 nanoparticles
Subject RIV: DN - Health Impact of the Environment Quality

A method of TiO2 nanoparticle generation appropriate for follow-up long lasting inhalation experiments with laboratory animals was tested. Nanoparticles were synthesized in an externally heated tube reactor using titanium tetraisopropoxide as a precursor. Total 264 hours of particle generation in four experimental campaigns was performed with one batch of precursor without observable decrease of precursor volatility. Particle production was studied in wide range of experimental conditions such as reactor temperature, reactor flow rate and precursor vapor pressure by pyrolysis, using nitrogen as a carrier gas, and also in oxidizing atmosphere (10 vol. % of oxygen in the reaction mixture). Particle characteristics were investigated by scanning/transmission electron microscopy, energy dispersive spectroscopy, inductively coupled plasma optical emission spectrometry, elemental and organic carbon analyzer, X-ray diffraction and X-ray photoelectron spectrometry. As a result, particle production with number concentration high above 1.0 x 10(7) #/cm(3) and with primary particle size well below 50 nm can be easily achieved in most of investigated experimental conditions. Particles are free of elemental carbon, content of organic carbon is less than 10 weight %, detected crystalline phase is typically anatase, Ti is present in bonds Ti-O (TiO2) and total Ti concentration recalculated on TiO2 is approximately 80 mass %.
Permanent Link: http://hdl.handle.net/11104/0246107