日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

The titanosilicates, with TS-1 as a representative material serving as efficient heterogeneous catalyst for the liquid-phase oxidation with hydrogen peroxide as oxidant, have been extensively studied in the fields of material chemistry and catalysis not only for the purpose of basic researches but also from the viewpoint of industrial applications. To develop much greener oxidation chemical processes, various novel titanosilicates with the crystalline topologies other than TS-1 have already been discovered. In particular, Ti-MWW, Ti-MOR and layered TS-1 possess unique catalytic properties not shared by the conventional ones, opening up new possibility for environmentally benign applications. Focusing on the MFI and MWW type layered titanosilicates, this review article summarizes the new development concerning the design synthesis, crystalline and pore structure modification, chemical control of the microenvironment of Ti active site, catalytic oxidation properties as well as commercial applications of these materials.