Patent ID: 6139803
Filing Date: 2000-10-31
Classification: A61L,B01D,Y10T

Abstract:
A room having a photocatalytic function, said room comprising:enclosing surfaces including vertical walls, a floor and a ceiling defining an interior for the room;a thin film of a photocatalytic semiconductor material having a band gap energy and covering at least a part of the enclosing surfaces of the room;an electric lamp mounted on one of said enclosing surfaces in a position whereby said semiconductor material is in a light receiving relationship with said lamp, said lamp being an electric lamp for general lighting applications emitting a visible light for illumination and at least a small amount of ultraviolet radiation within the wavelength range between 300 nm and the wavelength corresponding to the band gap energy of said semiconductor material, the wattage of said electric lamp and the distance between said semiconductor material and said lamp being such that, when said lamp is energized, the total incident light intensity, impinging upon said semiconductor material, of said ultraviolet radiation within said wavelength range is 0.001 to 1 mW/cm.sup.2.