▎ 摘　　要

NOVELTY - Method for removing surfactant in nanocatalyst comprises (i) dispersing the powdered nanocatalyst with surfactant adsorbed on the surface in the aqueous solution, and ultrasonically dispersing uniformly; (ii) adjusting the pH of the nanocatalyst dispersion liquid to acidic with an aqueous inorganic acid solution; (iii) dropping hydrogen peroxide aqueous solution and iron aqueous solution to the above acidic solution; (iv) heating the reaction for 4-10 hours under stirring conditions; (v) cooling down, centrifuging, and removing the supernatant; (vi) washing the solid with hot water until the pH is neutral, drying in an oven, and grinding. USE - The method is useful for removing surfactant in nanocatalyst. ADVANTAGE - The method is simple and has mild reaction condition. The nano-catalyst has high catalytic activity.