Preparation method of manganese ferrite nanoparticle-graphene compound

Abstract

The invention provides a preparation method of a manganese ferrite nanoparticle (MnFe2O4)-graphene compound. The preparation method comprises the following steps of: obtaining a mixed solution of manganese ions and oxidized graphene in the process of preparing the oxidized graphene by using a potassium permanganate graphite oxidizing method; adding enough H2O2 in the mixed solution, and reducing the manganese element into divalent manganese ions; adding tervalent ferric salt and divalent manganese salt, uniformly stirring the mixture, then, adding an alkaline solution in the mixed solution, adjusting the pH value of the solution to 8-13, then, heating the mixed solution to 70-99 DEG C, adding a reducing agent, and stirring for 0.5-24h to obtain a suspension liquid; and magnetically separating the suspension liquid and drying to obtain the manganese ferrite nanoparticle-graphene compound. According to the preparation method of the manganese ferrite nanoparticle-graphene compound, potassium permanganate used when the oxidized graphene is prepared can be sufficiently utilized so that the potassium permanganate can be converted into a nanomaterial containing manganese ferrites; and the preparation method has the characteristics of simplicity, environment friendliness, low cost and the like.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, and particularly designs a method for preparing a composite of magnetic nanoparticles and graphene. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial. Its unique structure determines its rich physical and chemical properties, including up to 2630m 2 / g theoretical specific surface area; with outstanding thermal conductivity (3000W / (m K)) and mechanical properties (Young's modulus 1060GPa, fracture strength 130GPa), and high-speed electron mobility at room temperature (1500cm / (V· s)) and a series of properties. It can be used in a series of applications such as sensors, energy storage materials, transistors, adsorption materials, catalyst supports, etc. The composites formed by graphene and other materials also have superior properties. For example, when composited with aluminum oxide, the electrical conductivity of the material can be significant...

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Problems solved by technology

However, there is no report on the use of a mixture containing potassium permanganate and graphene in the previous preparation of graphene oxide to prepare manganese ferrite and graphene composites, thus avoiding the problems caused by the use of purified graphene oxide in the original literature. The cumbersome separation and washing operations and the pollution caused by manganese in the waste liquid

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