Kinetics and size distributions in deaggregation of Titania nanocolloids

Themis Matsoukas, James Hall

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Titania is of relevance to chemical synthesis as a catalytic material and catalyst support, and a known photocatalyst with the ability to decompose a variety of pollutants in air and in water. Its ability to use naturally occurring sunlight to attack a variety of combustion pollutants and VOC suggests the possibility of low-cost, low-energy processes based on titania for maintaining a clean air and water environment. A study on the redispersion mechanism of heavily aggregated nanocolloidal titania was carried out to produce stable, well-dispersed nanoparticles. Despite the well-known ill-posed nature of the inverse problem, the combination of methodologies allowed to obtain reliable measures of the size distribution during peptization. Kinetics exhibited nearly first-order kinetics to a steady state size distribution which depended on the pH. An erosion-type mechanism in which colloidally unstable primary particles detach from aggregated clusters was presented. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).

Original languageEnglish (US)
Title of host publication05AIChE
Subtitle of host publication2005 AIChE Annual Meeting and Fall Showcase, Conference Proceedings
PublisherAmerican Institute of Chemical Engineers
Volume2005
ISBN (Print)0816909962, 9780816909964
StatePublished - Jan 1 2005
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Other

Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
CountryUnited States
CityCincinnati, OH
Period10/30/0511/4/05

All Science Journal Classification (ASJC) codes

  • Energy(all)

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  • Cite this

    Matsoukas, T., & Hall, J. (2005). Kinetics and size distributions in deaggregation of Titania nanocolloids. In 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase, Conference Proceedings (Vol. 2005). American Institute of Chemical Engineers.