Water-Tolerant, Highly Active Solid Acid Catalysts Composed of the Keggin-Type Polyoxometalate H3PW12O40 Immobilized in Hydrophobic Nanospaces of Organomodified Mesoporous Silica

摘要

Since the discovery of mesoporous silica, new organic-inorganic nanocomposites based on mesoporous silica materials have been extensively investigated in the development of functional materials in various fields. The grafting of organic groups onto the pore walls of the silica has provided novel materials for catalysis, heavy-metal ion adsorption, photo-controllable molecular storage, gas separation, and molecular recognition. Since the chemical functionalities of these materials have been ascribed mainly to the organic moiety, a promising strategy toward new functions is to design an inorganic-organic cooperative mechanism in nanostruc-tured materials.