Facile preparation of monolithic magnesium titanates with hierarchical porosity

Olim N. Ruzimuradov, George Hasegawa, Kazuyoshi Kanamori, Kazuki Nakanishi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this study, we for the first time came up with a facile approach to fabricate hierarchically porous nano-crystalline monolithic magnesium titanates (MgTi2O5/MgTiO3) by impregnating magnesium chloride into hierarchically porous TiO2 monolith in a solution containing urea followed by appropriate heat-treatment. The formation of porous MgTi2O5/MgTiO3 monolithic materials took place by the solid-state reaction between original TiO2 networks and precipitated MgCO3. The MgCO3 is precipitated within the TiO2 wet gel by the reaction between impregnated Mg2+ and CO2, which is produced by hydrolysis and decarbonation of chelating agent in the TiO2 wet gels and by the hydrolysis of urea at 60°C. The resultant porous magnesium titanates retained narrow macropore size distribution centered at the diameter ̃1 μm. These porous monoliths produced by impregnation, a facile and the low-cost method, are expected to open various engineering applications owing to the low thermal expansion coefficients and high chemical and physical stabilities.

Original languageEnglish
Pages (from-to)440-444
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume119
Issue number1390
DOIs
Publication statusPublished - Jun 2011

Fingerprint

magnesium titanates
ureas
Magnesium
hydrolysis
Urea
Hydrolysis
Porosity
Gels
decarbonation
gels
magnesium chlorides
porosity
impregnating
preparation
Magnesium Chloride
Chelating Agents
Solid state reactions
Impregnation
Thermal expansion
thermal expansion

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Facile preparation of monolithic magnesium titanates with hierarchical porosity. / Ruzimuradov, Olim N.; Hasegawa, George; Kanamori, Kazuyoshi; Nakanishi, Kazuki.

In: Journal of the Ceramic Society of Japan, Vol. 119, No. 1390, 06.2011, p. 440-444.

Research output: Contribution to journalArticle

Ruzimuradov, Olim N. ; Hasegawa, George ; Kanamori, Kazuyoshi ; Nakanishi, Kazuki. / Facile preparation of monolithic magnesium titanates with hierarchical porosity. In: Journal of the Ceramic Society of Japan. 2011 ; Vol. 119, No. 1390. pp. 440-444.
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