▎ 摘　　要

NOVELTY - Preparing rGO-PTCA-RhB composite material comprises (i) rGO-PTCA is obtained by ultrasonically dispersing graphene oxide in deionized water to form a uniform suspension, adding 3,4,9,10-decanetetracarboxylic acid to the suspension, stirring evenly, adding reducing agent and aqueous ammonia solution, stirring at 90-95 degrees C for 2-3 hours, allowing to stand for 30-40 minutes, separating, washing and drying, and (ii) rGO-PTCA-RhB composite is obtained by dissolving rGO-PTCA in deionized water, ultrasonizing for 3-5 hours, adding ethylenediamine and rhodamine B, stirring evenly and adding crosslinker EDC and NHS, reacting at room temperature for 22-24 hours, filtering and drying. USE - The methods is useful for preparing rGO-PTCA-RhB composite material. ADVANTAGE - The material has good conductivity and has good the electrochemical field.