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\bibitem{VanEynde_etal2013} {\textquotedblleft}\textit{Biotemplated diatom silica-titania materials for air purification}{\textquotedblright}. Van Eynde E, Tytgat T, Smits M, Verbruggen SW, Hauchecorne B, Lenaerts S, Photochemical \& photobiological sciences \textbf{12}, 690 (2013).   http://doi.org/10.1039/C2PP25229E

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