Patent ID: 7771797
Filing Date: 2010-08-10
Classification: B01J,C01B

Abstract:
1. A photocatalyst material producing method characterized by comprising forming a discharge zone with a discharge gap part defined therein by first and second electrodes facing each other and arranging a dielectric material on a surface of the first electrode facing to the second electrode, coating the second electrode or the surface of the dielectric material with a metal or metal compound to be a photocatalyst material, supplying oxygen gas containing ozone into the discharge gap part, applying an AC voltage between the first electrode and the second electrode to introduce AC power of a predetermined power density into the discharge zone, causing dielectric barrier discharge via the dielectric material, creating a state where oxygen gas and ozone gas exist in the discharge gap part, modifying the surface of the dielectric material or the surface of the second electrode contacting the discharge gap part to an oxidized surface by a mutual chemical reaction of high-field intermittent discharge plasma due to the dielectric barrier discharge and oxygen gas and ozone gas, thus adhering a photocatalyst material to the surface of the dielectric material or the metal surface of the second electrode, and removing the surface of the dielectric material or the surface of the second electrode, and using it as a photocatalyst material surface or photocatalyst material.