▎ 摘　　要

NOVELTY - Method for preparing salicylaldehyde Schiff base/graphene oxide modified paper-based material, involves (a) refluxing salicylaldehyde and 1,2,4,5-benzenetetramine hydrochloride in a mass ratio of (30-90):(10-30), separating the product in the reaction solution, drying to obtain salicylaldehyde Schiff base, soaking a paper in a graphene oxide dispersion, and drying to obtain a graphene oxide-modified paper-based material, (b) soaking the graphene oxide-modified paper-based material in salicylaldehyde Schiff base solution, and compounding the graphene oxide and salicylaldehyde Schiff base on the paper to form a composite (A), and (c) taking out the composite (A), drying to obtain the salicylaldehyde Schiff base/graphene oxide modified paper-based material. USE - The method is useful for preparing salicylaldehyde Schiff base/graphene oxide modified paper-based material used for detecting cupric ions in water (all claimed). ADVANTAGE - The prepared paper-based material achieves rapid detection of cupric through electrostatic interaction and coordination chelation between the hydroxyl, carboxyl and carbon-nitrogen double bonds in the material and cupric ions.