USE OF SILICON-TITANIUM MIXED OXIDE POWDER AS CATALYST

摘要

Use of a pyrogenic silicon-titanium mixed oxide powder which is present in the form of aggregated primary particles as catalyst or catalyst support, characterized in that the silicon-titanium mixed oxide powder has a proportion of TiO2 of from 94 to 99.5% by weight SiO2 of from 0.5 to 6% by weight, where the sum of the proportions of TiO2 and SiO2, based on the silicon-titanium mixed oxide powder, is at least 99.5% by weight and the proportions of TiO2 and SiO2 are distributed over the entire primary particle, a BET surface area of from 30 to 150 m2/g, an anatase content of from >80% to 95% based on the sum of rutile and anatase content, with the rutile and anatase regions of a primary particle being grown into one another, and a photon efficiency of at least 1.5%.