Nitrogen-doped TiO2 nanoparticles and the use thereof in photocatalysis
AssigneeColorobbia Consulting S.R.L.
InventorsGiovanni Baldi, Laura Niccolai, Marco Bitossi, Valentina Dami, Andrea Cioni, Giada Lorenzi
Life of this patent
Estimating the term…
Abstract
The invention relates to a photocatalyst that is active under irradiation with UV light, visible light and sunlight, comprising a powder or a ready-to-use nanometric suspension of nitrogen-doped TiO2, wherein the brookite crystalline phase is also present and whose doping nitrogen content (% by weight) is sufficient to ensure photocatalytic activity in the visible region. The photocatalyst can be easily applied to substrates of varying nature.
Claims20
A suspension of nitrogen-doped TiO2 (TiO2—N) nanoparticles in an organic and/or aqueous solvent, wherein the TiO2—N nanoparticles comprise at least a brookite crystalline phase in an amount of 10 to 75% by weight relative to the weight of the nanoparticles, a rutile crystalline phase in an amount of 25 to 90% by weight relative to the weight of the nanoparticles,
- wherein said TiO2—N nanoparticles further comprise an anatase crystalline phase,
- wherein said anatase crystalline phase is in an amount of 1 to 10% by weight, relative to the weight of the nanoparticles, and
- wherein the combined amount of the brookite crystalline phase, rutile crystalline phase and anatase crystalline phase do not exceed 100%.
A suspension of nitrogen-doped TiO2 (TiO2—N) nanoparticles in an organic and/or aqueous solvent, wherein the TiO2—N nanoparticles comprise at least a brookite crystalline phase in an amount of 10 to 75% by weight relative to the weight of the nanoparticles, a rutile crystalline phase in an amount of 25 to 90% by weight relative to the weight of the nanoparticles,
- wherein said TiO2—N nanoparticles further comprise an anatase crystalline phase,
- wherein said anatase crystalline phase is in an amount of 25 to 90% by weight, relative to the weight of the nanoparticles, and
- wherein the combined amount of the brookite crystalline phase, rutile crystalline phase and anatase crystalline phase do not exceed 100%.
Dependencies are inferred from the claim text.