The invention discloses a
graphene /
manganese tetraoxide
nanocomposite and a preparation method thereof. The method comprises the following steps of firstly, diluting
graphite oxide concentrated solution to be 0.1-5mg / mL with deionized water, stirring uniformly, after water bath ultrasonic at
room temperature, putting a
beaker into ice-water bath, and carrying out ultrasonic treatment by a probe ultrasonic processor to obtain
graphene oxide solution; secondly, adding
permanganate into the
graphene oxide solution, stirring till the
permanganate is dissolved completely, adding a
reducing agent, and stirring uniformly; thirdly, reacting the solution obtained in step two at 80-120 DEG C, after reacting, cooling, centrifuging and washing, and vacuum-
drying, so as to obtain the graphene /
manganese tetraoxide
nanocomposite. The graphene /
manganese tetraoxide
nanocomposite is prepared by one-step hydrothermal method, the
reducing agent simultaneously reduces the two raw materials, and the method is simple and easy to operate.