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\bibitem{Jammaer_etal2011} {\textquotedblleft}\textit{A non-aqueous synthesis of TiO$_{2}$SiO$_{2}$ composites in supercritical CO$_{2}$ for the photodegradation of pollutants}{\textquotedblright}. Jammaer J, Aprile C, Verbruggen SW, Lenaerts S, Pescarmona PP, Martens JA, Chemsuschem \textbf{4}, 1457 (2011).   http://doi.org/10.1002/CSSC.201100059

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