METHOD FOR PRODUCING TUNGSTEN TRIOXIDE POWDER FOR PHOTOCATALYST, TUNGSTEN TRIOXIDE POWDER FOR PHOTOCATALYST, AND PHOTOCATALYST PRODUCT

摘要

Disclosed is a method for producing a tungsten trioxide powder for photocatalysts, which is characterized by comprising a sublimation step wherein a tungsten trioxide powder is obtained by subliming a tungsten metal powder or a tungsten compound powder by inductively coupled plasma processing in an oxygen atmosphere, and a heat treatment step wherein the tungsten trioxide powder obtained in the sublimation step is heated at 300-1000°C for 10 minutes to 2 hours in an oxidizing atmosphere. A tungsten trioxide powder obtained by such a method for producing a tungsten trioxide powder for photocatalysts has high photocatalytic activity under visible light.