Abstract
A method to produce titanium oxide powders by in-droplet
hydrolysis of metal alkoxide precursor was studied. Onset
of titanium dioxide crystallization on the aerosol
particles was investigated. Titanium hydrous oxide
particles were prepared starting from an acetic acid
modified titanium alkoxide precursor solution aerosol at
200 °C in tube flow reactor. Titanium n-tetrabutoxide,
hydrolysis water, and acetic acid were included in the
ethanolic precursor solution that was nebulized. The
droplets were transported to a tubular flow reactor where
the chemical reactions formed solid particles. The
powders were characterized by XRD, TG-SDTA, BET, SEM,
TEM, EDS, XRF, IR- spectroscopy, and with aerosol
impactor. Micron sized powder particles were amorphous,
smooth on the surface, and either spherical or deflated
in shape. Subsequently, titanium dioxide particles were
produced by thermal post-annealing of the powders in air.
The onset of crystallization of aerosol particles to
nanocrystalline TiO2 was investigated at 500 °C reactor
temperature. Thinned particles were studied and the
initial crystallization was observed to be localized on
the surface of the particles.
| Original language | English |
|---|---|
| Publication status | Published - 2000 |
| MoE publication type | Not Eligible |
| Event | 2000 AIChE Annual Meeting - Los Angeles, United States Duration: 12 Nov 2000 → 17 Nov 2000 |
Conference
| Conference | 2000 AIChE Annual Meeting |
|---|---|
| Country/Territory | United States |
| City | Los Angeles |
| Period | 12/11/00 → 17/11/00 |