Alternative chemical route to mesoporous titania from a titanatrane complex

Chavalit Trakanprapai, Vincenzo Esposito, Silvia Licoccia, Enrico Traversa*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

High-purity, mesoporous titania was prepared by reaction of dimethylaminotitanatrane, [NMe2-Ti(OCH2 CH2)3N] in the presence of micellar aggregates as templating agents followed by thermal treatments in the temperature range 350-450 °C. The powders were characterized by nitrogen adsorption-desorption isotherms, thermogravimetry-differential thermal analysis, Fourier transform infrared, field-emission scanning electron microscopy, and x-ray diffraction. Analysis of the morphological characteristics of titanium oxide powders calcined at 350 °C for 120 h and at 450 °C for 6 h showed the presence of a mesoporous structure, with an average pore size of about 3.5 nm. Firing temperatures above 450 °C caused the collapse of the mesoporous structure. Composite Nafion-based membranes, containing 5 wt% mesoporous titania fired at 450 °C as a filler were successfully prepared. Preliminary tests in a prototype direct methanol fuel cell demonstrated that the composite membrane allowed cell operation up to 145 °C, thus showing a significant performance improvement over pure Nafion.

Original languageEnglish (US)
Pages (from-to)128-134
Number of pages7
JournalJournal of Materials Research
Volume20
Issue number1
DOIs
StatePublished - Jan 1 2005

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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