Effect of TiO2 doping on the characteristics of macroporous Al2O3/TiO2 membrane supports

H. Qi, Y. Fan, W. Xing, Aloysius J.A. Winnubst

Research output: Contribution to journalArticleAcademicpeer-review

55 Citations (Scopus)

Abstract

A cost-effective tubular macroporous ceramic support consisting of alumina and titania was prepared by extrusion and subsequent heat treatment. An Al2O3/TiO2 composite support with high porosity (41.4%), an average pore size of 6.8 μm and sufficient mechanical strength (32.7 MPa) was obtained after sintering at 1400 °C. The formation mechanism of this support as investigated with X-ray micromapping, SEM and XRD indicated that the appearance of Al2TiO5 plays a key role in the fabrication of high performance composite membrane supports at relatively low temperature. The amount of Al2TiO5 present in the composite has a strong impact on the properties of supports, especially with regard to the mechanical strength. A composite of 85 wt.% Al2O3/15 wt.% TiO2 sintered at 1400 °C for 2 h exhibited both high permeability (pure water flux of 45 m3 m−2 h−1 bar−1), together with an excellent corrosive resistance towards hot NaOH and HNO3 solutions.
Original languageEnglish
Pages (from-to)1317-1325
JournalJournal of the European Ceramic Society
Volume30
Issue number6
DOIs
Publication statusPublished - 2010

Keywords

  • Ceramic membranes
  • Macroporous support
  • Al2O3
  • IR-86685
  • TiO2
  • METIS-264895
  • Al2TiO5

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