Effect of preparation methods on properties of alumina/titanias

Makoto Toba, Fujio Mizukami, Shu-ichi Niwa, Yoshimichi Kiozumi, Kazuyuki Maeda, Arto Annila, Veikko Komppa

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Abstract

Alumina/titanias have been prepared by three methods: complexing-agent-assisted sol–gel; coprecipitation; and hydrogel kneading. The relationship between the preparation methods and the properties of the alumina/titanias was investigated by thermal gravimetry and differential thermal analysis (TG–DTA), X-ray powder diffraction, laser Raman spectroscopy, solid-state magic-angle spinning nuclear magnetic resonance (MAS-NMR), ammonia temperature-programmed desorption (TPD) and nitrogen adsorption. Of the three preparation methods, the complexing-agent-assisted sol–gel method gave the most homogeneous alumina/titanias, and their acidities and specific surface areas depended on complexing agents used in the preparation and the Ti:Al ratios of the raw materials. In contrast, kneading alumina/titanias were relatively heterogeneous and their properties did not depend on the Ti:Al ratio. Regarding the dependences of properties of alumina/titanias on the Ti:Al ratio, coprecipitation alumina/titanias are intermediate between complexing-agent-assisted sol–gel and kneading ones.
Original languageEnglish
Pages (from-to)585-589
Number of pages5
JournalJournal of Materials Chemistry
Volume4
Issue number4
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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Aluminum Oxide
Alumina
Coprecipitation
Magic angle spinning
Laser spectroscopy
Gravimetric analysis
Hydrogel
Temperature programmed desorption
Ammonia
Hydrogels
Acidity
Specific surface area
X ray powder diffraction
Differential thermal analysis
Raman spectroscopy
Raw materials
Nitrogen
Nuclear magnetic resonance
Adsorption

Cite this

Toba, M., Mizukami, F., Niwa, S., Kiozumi, Y., Maeda, K., Annila, A., & Komppa, V. (1994). Effect of preparation methods on properties of alumina/titanias. Journal of Materials Chemistry, 4(4), 585-589. https://doi.org/10.1039/JM9940400585
Toba, Makoto ; Mizukami, Fujio ; Niwa, Shu-ichi ; Kiozumi, Yoshimichi ; Maeda, Kazuyuki ; Annila, Arto ; Komppa, Veikko. / Effect of preparation methods on properties of alumina/titanias. In: Journal of Materials Chemistry. 1994 ; Vol. 4, No. 4. pp. 585-589.
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abstract = "Alumina/titanias have been prepared by three methods: complexing-agent-assisted sol–gel; coprecipitation; and hydrogel kneading. The relationship between the preparation methods and the properties of the alumina/titanias was investigated by thermal gravimetry and differential thermal analysis (TG–DTA), X-ray powder diffraction, laser Raman spectroscopy, solid-state magic-angle spinning nuclear magnetic resonance (MAS-NMR), ammonia temperature-programmed desorption (TPD) and nitrogen adsorption. Of the three preparation methods, the complexing-agent-assisted sol–gel method gave the most homogeneous alumina/titanias, and their acidities and specific surface areas depended on complexing agents used in the preparation and the Ti:Al ratios of the raw materials. In contrast, kneading alumina/titanias were relatively heterogeneous and their properties did not depend on the Ti:Al ratio. Regarding the dependences of properties of alumina/titanias on the Ti:Al ratio, coprecipitation alumina/titanias are intermediate between complexing-agent-assisted sol–gel and kneading ones.",
author = "Makoto Toba and Fujio Mizukami and Shu-ichi Niwa and Yoshimichi Kiozumi and Kazuyuki Maeda and Arto Annila and Veikko Komppa",
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Toba, M, Mizukami, F, Niwa, S, Kiozumi, Y, Maeda, K, Annila, A & Komppa, V 1994, 'Effect of preparation methods on properties of alumina/titanias', Journal of Materials Chemistry, vol. 4, no. 4, pp. 585-589. https://doi.org/10.1039/JM9940400585

Effect of preparation methods on properties of alumina/titanias. / Toba, Makoto; Mizukami, Fujio; Niwa, Shu-ichi; Kiozumi, Yoshimichi; Maeda, Kazuyuki; Annila, Arto; Komppa, Veikko.

In: Journal of Materials Chemistry, Vol. 4, No. 4, 1994, p. 585-589.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Effect of preparation methods on properties of alumina/titanias

AU - Toba, Makoto

AU - Mizukami, Fujio

AU - Niwa, Shu-ichi

AU - Kiozumi, Yoshimichi

AU - Maeda, Kazuyuki

AU - Annila, Arto

AU - Komppa, Veikko

PY - 1994

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N2 - Alumina/titanias have been prepared by three methods: complexing-agent-assisted sol–gel; coprecipitation; and hydrogel kneading. The relationship between the preparation methods and the properties of the alumina/titanias was investigated by thermal gravimetry and differential thermal analysis (TG–DTA), X-ray powder diffraction, laser Raman spectroscopy, solid-state magic-angle spinning nuclear magnetic resonance (MAS-NMR), ammonia temperature-programmed desorption (TPD) and nitrogen adsorption. Of the three preparation methods, the complexing-agent-assisted sol–gel method gave the most homogeneous alumina/titanias, and their acidities and specific surface areas depended on complexing agents used in the preparation and the Ti:Al ratios of the raw materials. In contrast, kneading alumina/titanias were relatively heterogeneous and their properties did not depend on the Ti:Al ratio. Regarding the dependences of properties of alumina/titanias on the Ti:Al ratio, coprecipitation alumina/titanias are intermediate between complexing-agent-assisted sol–gel and kneading ones.

AB - Alumina/titanias have been prepared by three methods: complexing-agent-assisted sol–gel; coprecipitation; and hydrogel kneading. The relationship between the preparation methods and the properties of the alumina/titanias was investigated by thermal gravimetry and differential thermal analysis (TG–DTA), X-ray powder diffraction, laser Raman spectroscopy, solid-state magic-angle spinning nuclear magnetic resonance (MAS-NMR), ammonia temperature-programmed desorption (TPD) and nitrogen adsorption. Of the three preparation methods, the complexing-agent-assisted sol–gel method gave the most homogeneous alumina/titanias, and their acidities and specific surface areas depended on complexing agents used in the preparation and the Ti:Al ratios of the raw materials. In contrast, kneading alumina/titanias were relatively heterogeneous and their properties did not depend on the Ti:Al ratio. Regarding the dependences of properties of alumina/titanias on the Ti:Al ratio, coprecipitation alumina/titanias are intermediate between complexing-agent-assisted sol–gel and kneading ones.

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Toba M, Mizukami F, Niwa S, Kiozumi Y, Maeda K, Annila A et al. Effect of preparation methods on properties of alumina/titanias. Journal of Materials Chemistry. 1994;4(4):585-589. https://doi.org/10.1039/JM9940400585