Abstract
We present a novel manufacture route for silica-titania photocatalysts using the diatom microalga Pinnularia sp. Diatoms self-assemble into porous silica cell walls, called frustules, with periodic micro-, meso- and macroscale features. This unique hierarchical porous structure of the diatom frustule is used as a biotemplate to incorporate titania by a sol-gel methodology. Important material characteristics of the modified diatom frustules under study are morphology, crystallinity, surface area, pore size and optical properties. The produced biosilica-titania material is evaluated towards photocatalytic activity for NOx abatement under UV radiation. This research is the first step to obtain sustainable, well-immobilised silica-titania photocatalysts using diatoms.
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This paper is published as part of the themed issue of contributions from the 7th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications held in Porto, Portugal, June 2012.
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Van Eynde, E., Tytgat, T., Smits, M. et al. Biotemplated diatom silica-titania materials for air purification. Photochem Photobiol Sci 12, 690–695 (2013). https://doi.org/10.1039/c2pp25229e
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DOI: https://doi.org/10.1039/c2pp25229e