Anatase and Rutile TiO₂ Macrocellular Foams: Air–Liquid Foaming Sol–Gel Process Towards Controlling Cell Sizes, Morphologies, and Topologies

Abstract

Titania foams (see Figure) can be produced using a non-static air–liquid foaming sol–gel process where nitrogen is bubbled through a mixture of a surfactant and a sol–gel precursor. Either anatase or rutile phase mesoporous titania foams are produced upon thermal treatment. Macroscopic cell morphologies can be tuned by changing the air-to-liquid-foam ratios and the size of the nitrogen bubbles, while wall topologies can be varied by changing surfactant. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2005/c1080_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.