▎ 摘　　要

NOVELTY - Intelligent magnetic lead ion sensor comprises reduced graphene oxide (RGO), iron oxide (Fe3O4) nanoparticles, silver nanoparticles and rhodamine B, where iron oxide nano particles are loaded on RGO sheet layer, and silver nano particles are coated on the surface of iron oxide nanoparticle, and rhodamine B is loaded on the silver nanoparticle. USE - Intelligent magnetic lead ion sensor used in a device for detecting lead ions in wastewater during wastewater treatment (all claimed). ADVANTAGE - The intelligent magnetic sensor has wide raw material source, simple and convenient preparation process and easy industrialized production, sensor is capable of quickly realizing the detection of lead ions in wastewater, has high detection sensitivity and strong selectivity, and utilize the magnetism of sensor after detection to be recycled through the enrichment of external magnetic field, which avoids disposable consumption. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method for preparing intelligent magnetic lead ion sensor, which involves: (a)preparing iron oxide/reduced graphene oxide (Fe3O4/RGO) nanoparticles; (b) dispersing Fe3O4/RGO nanoparticles in water, adding silver nitrate solution, hydrazine hydrate solution and sodium hydroxide solution, reacting for a period of time in the dark, and purifying, washing and drying after the reaction is completed to obtain iron oxide-silver/reduced graphene oxide (Fe3O4-Ag/RGO) nanomaterials; and (c) dispersing Fe3O4-Ag/RGO nanomaterial in water, adding specific concentration of RB aqueous solution, placing at specific temperature to react for a period of time, and purifying, washing and drying to obtain an intelligent magnetic lead ion sensor; (2) a method for detecting lead ions in wastewater, which involves using intelligent magnetic lead ion sensor for detection; and (3) a device for detecting lead ions in wastewater, which comprises an intelligent magnetic lead ion sensor.