METHOD OF MANUFACTURING PHOTOCATALYTIC ACTIVE MATERIAL FOR GAS PHASE AND PHOTOCATALYTIC ACTIVE MATERIAL FOR GAS PHASE

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method for a photocatalytic active material for gas phase excellent in photocatalytic activity and capable of decomposing a harmful material in gas in a short time and to provide the photocatalytic active material for gas phase. SOLUTION: The photocatalytic active material for gas phase is manufactured by forming a photocatalyst layer containing the photocatalytic active material and bringing the photocatalyst layer into contact with the liquid containing water or forming the photocatalyst layer containing the photocatalytic active material and a water-retaining material and bringing the photocatalyst layer into contact with the liquid containing the water or putting the photocatalyst layer in an atmosphere containing moisture. In the photocatalytic active material for gas phase, the water content R expressed by formula (I) (Aw is the weight of the moisture in the photocatalyst layer, Ap is the weight of the photocatalytic active material) is =1 wt.%. R(%)=[Aw/(Aw+Ap)]100... (I).