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


  • The authors wish to thank Eric Lebreau (ICMCB-UPR 9048 CNRS) for the thermally assisted XRD data acquisition, Elizabeth Sellier (CREMEM-Université Bordeaux-1) for SEM picture acquisition, and Odile Babet (LCOO-Université Bordeaux-1) for the nitrogen physisorption data acquisition. This work is part of the 6th PCRDT REX European program (FAME-MIOH). Supporting Information is available online from Wiley InterScience or from the author.


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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.

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