| abstract |
Photocatalyst compositions may include a photocatalyst layer formed or disposed on the surface of a porous substrate. A metal may be disposed on the photocatalyst layer. If the metal is present predominantly at the surface of the photocatalyst layer, the metal can be utilized efficiently for photocatalytic reactions. The photocatalyst composition may be preferably formed by disposing the photocatalyst layer on the surface of the porous substrate and depositing the metal predominantly on the surface of the photocatalyst layer. Photocatalytic filter devices may include these photocatalyst compositions. |