Inorganic pigment with the function of light activated catalyst
AssigneeSpectrum Blue AS
InventorRazvan-Catalin BUCURESTEANU
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Abstract
The present invention relates to an inorganic pigment with the function of a catalyst that can be activated by light from the entire visible spectrum but also in the absence of light, to a process for obtaining it, to various formulations containing this inorganic pigment and its use. The present invention also provides a method of destroying pathogens represented by irradiating with electromagnetic radiation from the entire visible spectrum (400 nm-700 nm) the surfaces on which they have been applied -formulations containing the inorganic pigment. Additionally, the invention provides the use of the pigment disclosed herein for its catalytic, bactericidal, virucidal and de-pollution activity in the absence of light.
Claims13
1-15. (canceled)
An inorganic pigment with the function of a light-activated catalyst but also in the absence of light comprising:
- a first layer composed of a semiconductor metal oxide selected from TiO2, rutile, or anatase with high dielectric constant characterized by a relative permittivity cr in the range 60-100 and with a size in the range 200 nm up to at 4 μm;
- a second layer called a two-dimensional pseudo-perovskite layer which consists of inorganic ferroelectric structures of the perovskite or pseudo-perovskite type of the ABO3 or A2B2O6 form;
- and
- a third layer consisting of nanometric metal clusters that are deposited on the structure of the second layer.
Dependencies are inferred from the claim text.