Kinetics and size distributions in deaggregation of Titania nanocolloids

Themis Matsoukas, James Hall

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


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
ISBN (Print)0816909962, 9780816909964
StatePublished - 2005
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Publication series

NameAIChE Annual Meeting Conference Proceedings


Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
Country/TerritoryUnited States
CityCincinnati, OH

All Science Journal Classification (ASJC) codes

  • General Energy


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