▎ 摘　　要

NOVELTY - Composite silver-plating solution comprises 20-60g/L water-soluble compound containing silver, 150-300g/L sodium thiosulfate, 20-60g/L sodium metabisulfite, 0.2-1g/L polyethylene imine, 0.2-1g/L thio amino urea, 0.1-2g/L graphene oxide and 0.05-1g/L cetrimonium bromide (CTAB). USE - Composite silver-plating solution. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite silver plating solution, which involves: (A) mixing a water-soluble silver-containing compound, sodium thiosulfate, potassium metabisulfite, polyethyleneimine and thiosemicarbazide to obtain a mixed solution; and (B) mixing the mixed solution with graphene oxide and cetyltrimethylammonium bromide to dissolve the graphene oxide under an ultrasonic condition to obtain a composite silver plating solution.