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\bibitem{Ouwehand_etal2018} {\textquotedblleft}\textit{Titania-functionalized diatom frustules as photocatalyst for indoor air purification}{\textquotedblright}. Ouwehand J, Van Eynde E, De Canck E, Lenaerts S, Verberckmoes A, Van der Voort P, Applied catalysis : B : environmental \textbf{226}, 303 (2018).   http://doi.org/10.1016/J.APCATB.2017.12.063

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