| 摘要 |
<p>PROBLEM TO BE SOLVED: To prepare a photocatalyst film improved in efficiency by increasing the porosity and specific surface area of the photocatalyst film. SOLUTION: The specific surface area of this photocatalyst film can be increased compared with the conventional photocatalyst films, since this photocatalyst film formed on a substrate has >=40% and <=80% open porosity. Therefore, since the contact area of the photocatalyst film with various contaminants is increased, the photocatalytic reaction proceeds more efficiently to achieve large improvement of the photocatalyst efficiency. The photocatalyst film is made from a compound such as TiO2, SrTiO3, CdS, CdTe, Si, WO3, MoS2, Bi2O3, ZnO, SiC, GaP, GaAs and Fe2O3 and the substrate to be used has >=50% and <=95% open porosity.</p> |
