| abstract |
(57) [Summary] [Object] An object of the present invention is to enhance the efficiency of photooxidation or photoreduction. An electromagnetic wave having a sufficient energy to excite the photocatalyst and having a wavelength outside the absorption wavelength band of a substance that generates a target oxidation or reduction reaction inhibitor is formed by using a particulate semiconductor photocatalyst. Irradiate in a solution containing dissolved substances. [Effect] Ions or complexes can be efficiently converted into simple substances, or can be efficiently separated and recovered. |