Visible-Light-Activated Multilayered Photocatalyst And The Method Of Its Preparation
AssigneeUniwersytet Jagiellonski
InventorsWojciech Macyk, Marta Buchalska, Mateusz Trochowski, Przemyslaw Labuz
Life of this patent
Estimating the term…
Abstract
Visible-light-active and photostable, multilayered materials and their preparation method based on surface-modified titanium(IV) oxide have been invented.
Claims11
Preparation method of a visible-light-activated multilayered photocatalyst characterized in that:
- a) modifies the surface of titanium(IV) oxide in the form of powder or coating by impregnation with a modifier solution, where the modifier is an aromatic organic compound with at least two —OH or —COOH groups or a hexachloroplatinate(IV) ion,
- b) the protective layer of titanium(IV) oxide is applied on the modified material, where the known ALD or “spin-coating” techniques are used.
Photocatalyst characterized in that it contains two, in principle parallel surfaces consisting of titanium(IV) oxide and an appropriate binding layer between them consisting of an aromatic organic compound with minimum two —OH or —COOH groups or hexachloroplatinate(IV) ion, where, preferably, the organic compound is one of the group encompassing a compound with formula I:
- where:
- R1-R4 denotes —H, saturated or unsaturated substituents, —NH2, —NH3+or —SO3M, in which M denotes H+, K+, Na+, Li+, NH4+, and R5 and R6 denote —OH or —COOH, ascorbic acid, 2,5-dihydroxyterephthalic acid, chloroplatinic acid, hematoxilin and bromopyrogallol red.
Dependencies are inferred from the claim text.