Preparation method of manganese dioxide/carbon material composite nano materials

The present invention discloses a preparation method of manganese dioxide/carbon material composite nano materials. The preparation method comprises: (1) adding a certain amount of carbon materials into an aqueous solution, and forming a solution after uniform ultrasonic dispersion; (2) exposing the solution to light source irradiation, and dropwise adding a certain amount of liquor potassic permanganate to the solution; (3) after performing an illumination reaction of the solution for a while, performing centrifugal separation and washing of the solution, and obtaining a sample; and (4) freezing, drying and grinding the sample, and obtaining the manganese dioxide and carbon material composite nano materials. The light source employed in the method provided by the invention is an ultraviolet light or a visible light or a natural light, in particular, sunlight is directly employed to obtain composite structure of corresponding flocculent structure nano manganese dioxide and carbon materials. According to the test result, the preparation method of manganese dioxide/carbon material composite nano materials is able to quickly obtain manganese dioxide/carbon material composite materials, and is simple in process, easy to operate, environmentally friendly and energy saving.