▎ 摘　　要

NOVELTY - Preparing polyimide composite foam material having photocatalytic performance, comprises (i) preparing yttrium-manganese co-doped graphitic carbon nitride, (ii) preparing cerium-cobalt co-doped copper(I) phosphide, and (iii) (a) adding polyamic acid, graphene oxide, yttrium-manganese co-doped graphitic carbon nitride prepared in step (I) and cerium-cobalt co-doped copper(I) phosphide prepared in step (II) into water, then adding triethylamine to stirring and dispersing evenly to obtain aqueous dispersion, and (b) pouring the aqueous dispersion prepared in step (a) into a mold, then freeze-drying in a vacuum, and carrying out thermal imidization to obtain composite foam material. USE - The polyimide syntactic foam material having photocatalytic performance is useful for treating printing and dyeing wastewater in organic wastewater (claimed). ADVANTAGE - The method: utilizes the synergistic effect between the above-mentioned components and improves the treatment capacity of printing and dyeing wastewater; and has a relatively high reuse rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for polyimide composite foam material with photocatalytic performance obtined by the method