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Multi-functional materials which have a photocatalytic layer with a photocatalytic function disposed on the surface of a base through a binder layer 6 interposed therebetween. Photocatalytic particles of the photocatalytic layer are joined together by a surface energy or solid-state sintering. The p

Multi-functional materials which have a photocatalytic layer with a photocatalytic function disposed on the surface of a base through a binder layer 6 interposed therebetween. Photocatalytic particles of the photocatalytic layer are joined together by a surface energy or solid-state sintering. The photocatalytic layer may have a structure in which fine particles fill interstices defined between photocatalytic particles or a structure in which no fine particles fill interstices defined between photocatalytic particles. A metal such as Ag, Pt, or the like may be fixed or not fixed to surfaces of the photocatalytic particles.

대표청구항 ▼

[ We claim:] [1.]1. A multi-functional material with a photocatalytic function, comprising:a base;a photocatalytic layer having a photocatalytic function and disposed on a surface of said base, said photocatalytic layer including at least a surface layer exposed outwardly, said surface layer being c

[ We claim:] [1.]1. A multi-functional material with a photocatalytic function, comprising:a base;a photocatalytic layer having a photocatalytic function and disposed on a surface of said base, said photocatalytic layer including at least a surface layer exposed outwardly, said surface layer being composed of fine photocatalytic particles joined together with interstices defined therebetween at a predetermined porosity;a binder layer disposed between said photocatalytic layer and said base such that said photocatalytic layer is disposed on the surface of said base through said binder layer;said photocatalytic layer further including a lower layer embedded in the binder layer; andsaid interstices between said photocatalytic particles of said surface layer of said photocatalytic layer are filled with particles which are smaller than said pores;at least some of said smaller particles are reacted with a solution containing a salt such that metal ions of the smaller particles form an insoluble, white or colorless salt therewith;said photocatalytic particles are made of TiO.sub.2, the smaller particles filled in the interstices between the photocatalytic particles are made of Ag, and said solution containing a salt comprises an aqueous solution of a halide.