OZONE GENERATOR AND OZONE GENERATING METHOD

摘要

Disclosed are an ozone generator and an ozone generating method for highly efficiently generating ozone at a high concentration wherein there is used a raw material gas mainly containing an oxygen gas to which no nitrogen is added, thereby producing no NOx by-product. Ozone is generated by supplying a raw material gas (25) mainly containing an oxygen gas which is free from nitrogen into an ozone generator (300), producing at least a discharge light having a wavelength of 428-620 nm by applying an alternating current voltage thereto, arranging a photocatalyst substance containing a photocatalyst substance (303) having a band gap of 2.0-2.9 eV on an electrode or dielectric body in a discharge area, and maintaining the gas pressure at 0.1-0.4 MPa.