| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for regenerating a photocatalyst that determines the deterioration degree of a photocatalyst member with changes in color of the photocatalyst member and regenerates changes in color and catalytic activity accompanied with the deterioration of a photocatalyst in accordance with determination results and an apparatus for cleaning a corrosive gas having the photocatalyst member to be regenerated with this regeneration method.SOLUTION: The apparatus 1 for cleaning a corrosive gas decomposes and removes the corrosive gas by allowing the corrosive gas to contact the photocatalyst filter 2 of a complex compound where at least one metal out of platinum, silver, copper, and vanadium is supported on titanium oxide. The color of the photocatalyst filter 2 is detected by a color detecting means 3 (color sensor) and a deterioration degree determining means 4 determines the deterioration degree of the photocatalyst based on the changes in color of the photocatalyst filter 2. Based on the determination by the deterioration degree determining means 4, a photocatalyst regenerating means 5 allows a cleaning liquid containing an oxidizing agent to contact the photocatalyst filter 2, thereby regenerating the photocatalyst filter 2. |
