Abstract: A granulated material comprising a mixed silicon-titanium oxide powder, wherein a proportion of TiO2 is from 70 to 98 wt %, a proportion of SiO2 is from 2 to 30 wt %, and a sum of TiO2 and SiO2 is at least 98% by weight, and wherein: at room temperature, the TiO2 proportion comprises rutile and more than 50% of anatase, the BET surface area is from 10 to 200 m2/g, and the volume of 2 to 50 nm pores is from 0.4 to 2.5 ml/g; and after heating at 900° C. for a period of 4 hours, the anatase proportion is more than 50% of the room temperature proportion, the BET surface area is at least 60% of the room temperature BET surface area, and the volume of 2 to 50 nm pores is at least 50% of the room temperature volume.

Abstract: Silicon titanium mixed oxide powder having the following features: BET surface area of 5 to 300 m2/g, silica content, based on the total amount of the mixed oxide powder, of ?0.1 to <0.5% by weight, titanium dioxide content, based on the total amount of the mixed oxide powder, of ?99.0% by weight, sum of the proportions of silica and titanium dioxide, based on the total amount of the mixed oxide powder, ?99.5% by weight, titanium dioxide content of the primary particles comprising intergrown rutile and anatase phases, silica content of the primary particles amorphous, is prepared by allowing the vapours of one or more, in each case oxidizable and/or hydrolyzable titanium and silicon compounds to react in a high temperature zone with oxygen and/or steam, cooling the reaction mixture after the reaction and separating off the pulverulent solid from gaseous substances.

Abstract: Silicon titanium mixed oxide powder having the following features: BET surface area of 5 to 300 m2/g, silica content, based on the total amount of the mixed oxide powder, of ?0.1 to <0.5% by weight, titanium dioxide content, based on the total amount of the mixed oxide powder, of ?99.0% by weight, sum of the proportions of silica and titanium dioxide, based on the total amount of the mixed oxide powder, ?99.5% by weight, titanium dioxide content of the primary particles comprising intergrown rutile and anatase phases, silica content of the primary particles amorphous. It is prepared by allowing the vapours of one or more, in each case oxidizable and/or hydrolyzable titanium and silicon compounds to react in a high temperature zone with oxygen and/or steam, cooling the reaction mixture after the reaction and separating off the pulverulent solid from gaseous substances. Dispersion containing the silicon titanium mixed oxide powder. Substrate coated with the silicon titanium mixed oxide powder.

Abstract: Preparation containing at least one photocatalytically active metal oxide powder with a specific surface area of at least 20 m2/g at least one wetting agent. Use of the preparation for weed control.

Abstract: Preparation containing at least one UV radiation absorbing metal oxide powder and at least one superspreading agent. Use of the preparation for the reduction of sunburn damage in useful plants.

Abstract: Use of titanium dioxide mixed oxide as a photocatalyst, wherein the titanium dioxide mixed oxide has the following features: BET surface area: 5 to 300 m2/g, mixed oxide component: one or several oxides from the group comprising aluminium, cerium, silicon, tungsten, zinc and zirconium, proportions: titanium dioxide more than 97.5 wt. %, mixed oxide component ?0.1 to <2 wt. %, sum of the contents of titanium dioxide and secondary component at least 99.5 wt. %, each based on the total quantity of the mixed oxide, titanium dioxide content of the primary particles containing intergrown rutile and anatase phases.