Title
Biotemplated diatom silica-titania materials for air purification Biotemplated diatom silica-titania materials for air purification
Author
Faculty/Department
Faculty of Sciences. Bioscience Engineering
Publication type
article
Publication
Subject
Physics
Chemistry
Biology
Engineering sciences. Technology
Source (journal)
Photochemical & photobiological sciences
Volume/pages
12(2013) :4 , p. 690-695
ISSN
1474-905X
1474-9092
ISI
000316572500016
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We present a novel manufacture route for silicatitania 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 solgel methodology. Important material characteristics of the modified diatom frustules under study are morphology, crystallinity, surface area, pore size and optical properties. The produced biosilicatitania material is evaluated towards photocatalytic activity for NOx abatement under UV radiation. This research is the first step to obtain sustainable, well-immobilised silicatitania photocatalysts using diatoms.
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