Single-walled carbon nanotube-facilitated dispersion of particulate TiO2 on ZrO2 ceramic membrane filters

Yuan Yao, Gonghu Li, Kimberly A Gray, Richard M Lueptow

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We report that SWCNTs substantially improve the uniformity and coverage of TiO2 coatings on porous ZrO2 ceramic membrane filters. The ZrO2 filters were dip coated with 100 nm anatase TiO2, TiO2/SWCNT composites, a TiO2+SWCNT mixture, and a TiO2/MWCNT composite at pH 3, 5, and 8. Whereas the TiO 2+SWCNT mixture and the TiO2/MWCNT composite promote better coverage and less clumping than TiO2 alone, the TiO 2/SWCNT composite forms a complete uniform coating without cracking at pH 5 (∼ 100% coverage). A combination of chemical and electrostatic effects between TiO2 and SWCNTs forming the composite as well as between the composite and the ZrO2 surface explains these observations.

Original languageEnglish (US)
Pages (from-to)7072-7075
Number of pages4
JournalLangmuir
Volume24
Issue number14
DOIs
StatePublished - Jul 15 2008

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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