| 摘要 |
The present invention describes a composition and a method for producing mesoporous metal oxide materials with a chiral organization. In the method, a polymerizable metal oxide precursor is condensed inside the pores of chiral nematic mesoporous silica by the so-called "hard templating" method. As a specific example, mesoporous titanium dioxide has been formed inside of the chiral nematic silica films templated by nanocrystalline cellulose (NCC). After dissolving the silica in concentrated aqueous base, the resulting product is a mesoporous titania with a high surface area. The material may be obtained as an iridescent film. Through using this hard templating method, other metal oxide structures (e.g.. tin dioxide, iron oxide, niobium oxide, zirconium oxide, tantalum oxide, vanadium oxide) with chiral nematic organization may be prepared. These materials with high surface area and chiral nematic structures may be useful in photonic applications, enantioselective catalysis, photocatalysis. photovoltaics. UV filters, batteries, and sensors. |
