PHOTOCATALYTIC NANOCOMPOSITE STRUCTURED WITH BORON

摘要

A photocatalytic inorganic-organic hybrid composite material structured with boron and its preparation, comprising (a) particles composed of (a.1) nanoparticles (NPs) with = 1 of dimensions = 20 nm of at least one metal oxide being in particular TiO2 alone or TiO2 mixed with oxides of = 1 metals selected from Zn, Al, Tl and Zr, (a.2) in particular particles of boron oxide or boron particles or clusters resulting from H3BO3 or B(OR)3, (a.3) a network made of condensation products of in particular alcohols, silanes and metal(loid) alkoxides, the metals being = 1 of Ti, Tl, Zn, Zr, Al, the metalloids being = 1 of Si, B, Sb; said network encapsulating the particles (a.2), said network including -O- bridges between the NPs (a.1) and the particles (a.2); (b) at least one resin, in particular an acrylic resin, optionally chemically modified by silane(s), siloxane(s) and/or silane coupling agents. These materials show enhanced UV and visible activity.