▎ 摘　　要

NOVELTY - A tin oxide-titanium dioxide heterojunction magnetic photocatalytic composite adsorption material comprises 14-26 pts. wt. magnetic chitosan-graphene, 50-58 pts. wt. cerium-doped porous tin oxide, and 24-28 pts. wt. titanium tetrachloride. USE - The tin oxide-titanium dioxide heterojunction magnetic photocatalytic composite adsorption material is used for magnetic field. ADVANTAGE - The adsorption material captures photogenerated electrons, reduces recombination rate of photogenerated electron-hole, promotes the migration and transport of photogenerated electrons and holes, effectively suppresses the recombination of photogenerated electrons and holes, can magnetically adsorb copper ion (Cu2+), cadmium ion (Cd2+) and other heavy metal ions, and has improved separation efficiency of photogenerated electrons and holes in the heterojunction, excellent magnetic properties, and enhanced adsorption of heavy metals and their ions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the composite adsorption material comprising mixing ethanol solvent and propylene glycol at volume ratio of 1.5-2:1, adding remaining raw materials, water bath heating to 50-60 degrees C for 15-20 hours, adding acetone solvent, stirring for 6-10 hours, removing solvent, washing solid product, and drying.