Aerosol synthesis of Ti-O powders via in-droplet hydrolysis of titanium alkoxide

Petri Ahonen, Unto Tapper, Jean-Claude Joubert, Jean-Luc Deschanvres, E.I. Kauppinen (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

35 Citations (Scopus)

Abstract

A method to produce Ti–O powders by an in-droplet hydrolysis of metal alkoxide precursor is presented. Titanium n-tetrabutoxide, hydrolysis water, and acetic acid were included in the ethanolic precursor solution that was nebulized. The resulting aerosol was transported to a tubular flow reactor where the ethanol evaporation initiated a polycondensation reaction and solid particles were formed starting from droplet surface. Titanium hydrous oxide particles were obtained at 200°C in atmospheric pressure of nitrogen and air. The collected powders were characterized by XRD, TG–SDTA, BET, SEM, TEM, and IR- spectroscopy, as well as with aerosol impactor. The as-produced powder particles were amorphous, smooth on the surface, and either spherical or deflated in shape. Aerodynamic mass mean diameter was 2.7 μm. Nanocrystalline TiO2 was obtained after thermal post-annealing for one hour. An expected tendency to convert to anatase crystalline phase up to 500°C and subsequently to rutile phase up to 900°C in the annealing was observed. The results show that the in-droplet hydrolysis is a viable method in preparing fine Ti–O powder particles with controlled properties.
Original languageEnglish
Pages (from-to)113-121
Number of pages9
JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume315
Issue number1-2
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

Fingerprint

alkoxides
Titanium
Aerosols
Powders
hydrolysis
Hydrolysis
aerosols
titanium
synthesis
Annealing
impactors
annealing
Titanium oxides
Polycondensation
acetic acid
aerodynamics
Acetic acid
titanium oxides
Acetic Acid
anatase

Cite this

@article{974785ad87594b5397095e6f936dca3a,
title = "Aerosol synthesis of Ti-O powders via in-droplet hydrolysis of titanium alkoxide",
abstract = "A method to produce Ti–O powders by an in-droplet hydrolysis of metal alkoxide precursor is presented. Titanium n-tetrabutoxide, hydrolysis water, and acetic acid were included in the ethanolic precursor solution that was nebulized. The resulting aerosol was transported to a tubular flow reactor where the ethanol evaporation initiated a polycondensation reaction and solid particles were formed starting from droplet surface. Titanium hydrous oxide particles were obtained at 200°C in atmospheric pressure of nitrogen and air. The collected powders were characterized by XRD, TG–SDTA, BET, SEM, TEM, and IR- spectroscopy, as well as with aerosol impactor. The as-produced powder particles were amorphous, smooth on the surface, and either spherical or deflated in shape. Aerodynamic mass mean diameter was 2.7 μm. Nanocrystalline TiO2 was obtained after thermal post-annealing for one hour. An expected tendency to convert to anatase crystalline phase up to 500°C and subsequently to rutile phase up to 900°C in the annealing was observed. The results show that the in-droplet hydrolysis is a viable method in preparing fine Ti–O powder particles with controlled properties.",
author = "Petri Ahonen and Unto Tapper and Jean-Claude Joubert and Jean-Luc Deschanvres and E.I. Kauppinen",
note = "Project code: K7SU00028",
year = "2001",
doi = "10.1016/S0921-5093(01)01153-4",
language = "English",
volume = "315",
pages = "113--121",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier",
number = "1-2",

}

Aerosol synthesis of Ti-O powders via in-droplet hydrolysis of titanium alkoxide. / Ahonen, Petri; Tapper, Unto; Joubert, Jean-Claude; Deschanvres, Jean-Luc; Kauppinen, E.I. (Corresponding Author).

In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 315, No. 1-2, 2001, p. 113-121.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Aerosol synthesis of Ti-O powders via in-droplet hydrolysis of titanium alkoxide

AU - Ahonen, Petri

AU - Tapper, Unto

AU - Joubert, Jean-Claude

AU - Deschanvres, Jean-Luc

AU - Kauppinen, E.I.

N1 - Project code: K7SU00028

PY - 2001

Y1 - 2001

N2 - A method to produce Ti–O powders by an in-droplet hydrolysis of metal alkoxide precursor is presented. Titanium n-tetrabutoxide, hydrolysis water, and acetic acid were included in the ethanolic precursor solution that was nebulized. The resulting aerosol was transported to a tubular flow reactor where the ethanol evaporation initiated a polycondensation reaction and solid particles were formed starting from droplet surface. Titanium hydrous oxide particles were obtained at 200°C in atmospheric pressure of nitrogen and air. The collected powders were characterized by XRD, TG–SDTA, BET, SEM, TEM, and IR- spectroscopy, as well as with aerosol impactor. The as-produced powder particles were amorphous, smooth on the surface, and either spherical or deflated in shape. Aerodynamic mass mean diameter was 2.7 μm. Nanocrystalline TiO2 was obtained after thermal post-annealing for one hour. An expected tendency to convert to anatase crystalline phase up to 500°C and subsequently to rutile phase up to 900°C in the annealing was observed. The results show that the in-droplet hydrolysis is a viable method in preparing fine Ti–O powder particles with controlled properties.

AB - A method to produce Ti–O powders by an in-droplet hydrolysis of metal alkoxide precursor is presented. Titanium n-tetrabutoxide, hydrolysis water, and acetic acid were included in the ethanolic precursor solution that was nebulized. The resulting aerosol was transported to a tubular flow reactor where the ethanol evaporation initiated a polycondensation reaction and solid particles were formed starting from droplet surface. Titanium hydrous oxide particles were obtained at 200°C in atmospheric pressure of nitrogen and air. The collected powders were characterized by XRD, TG–SDTA, BET, SEM, TEM, and IR- spectroscopy, as well as with aerosol impactor. The as-produced powder particles were amorphous, smooth on the surface, and either spherical or deflated in shape. Aerodynamic mass mean diameter was 2.7 μm. Nanocrystalline TiO2 was obtained after thermal post-annealing for one hour. An expected tendency to convert to anatase crystalline phase up to 500°C and subsequently to rutile phase up to 900°C in the annealing was observed. The results show that the in-droplet hydrolysis is a viable method in preparing fine Ti–O powder particles with controlled properties.

U2 - 10.1016/S0921-5093(01)01153-4

DO - 10.1016/S0921-5093(01)01153-4

M3 - Article

VL - 315

SP - 113

EP - 121

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

IS - 1-2

ER -