Niobia–silica mesoporous materials (xerogel, aerogel and MCM type) have been synthesized by sol–gel techniques using different co-solvents as templates. All materials are active catalysts in the epoxidation of cyclohexene with hydrogen peroxide, but only meso–macroporous aerogels give a stable and recyclable catalyst.
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Somma, F., Strukul, G. Niobium Containing Micro-, Meso- and Macroporous Silica Materials as Catalysts for the Epoxidation of Olefins with Hydrogen Peroxide. Catal Lett 107, 73–81 (2006). https://doi.org/10.1007/s10562-005-9733-y
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DOI: https://doi.org/10.1007/s10562-005-9733-y