Abstract: A method for manufacturing high performance photocatalytic filters is disclosed, which comprises the steps of: preparation of a photocatalytic material selected from a titanium dioxide (TiO2), a zinc oxide (ZnO), a tin dioxide (SnO2) and the mixtures thereof; metal-modification of the photocatalytic material with using the photo-deposition method, such as silver (Ag), gold (Au) or platinum (Pt), so as to enable the photocatalytic material to have a good photocatalytic activity and thus enable the as-prepared photocatalytic filter to photocatalytically degrade various volatile organic compounds (VOCs) and non-organic gases as well as all kinds of pollutants. The photocatalytic filter made of the aforesaid photocatalytic material enjoys a comparatively longer lifespan with persisting catalytic activity, and can be easily regenerated by a water-washing process.

Abstract: A photocatalyst powder and the method of chemical vapor deposition for producing the same are provided. Titanium salt is injected into a chamber by the carrier gas. After reaction with oxygen gas, the photocatalyst particle is introduced to a low temperature collection device. The synthesized titanium dioxide powder is nano-sized, well-dispersed and anatase-crystallinity. The air contaminant was degraded with this photocatalyst under 315 nm to 700 nm irradiation. The method enhances the conversion of sunlight irradiation to chemical energy.