Abstract
Catalytic properties of niobosilicates were tested in the oxidation reactions with aqueous H2O2 using cyclohexene, methyl phenyl sulphide and geraniol as model substrates. The catalytic performance of niobosilicates was found sensitive to the type of matrix, niobium source and location of niobium. Structural and textural parameters of the materials synthesized and the location of niobium were monitored during the catalytic reactions. Different catalytic activities of the catalysts prepared with different niobium precursors were related to different location of niobium in the matrix. Highly ordered, 3D caged cubic mesoporous silicates containing niobium, NbFDU-1, and 2D hexagonal mesoporous niobosilicates, NbSBA-15, showed good activities and selectivities.
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