Preparation method of octahedron nickel nano micro-material

Abstract

The invention relates to a preparation method of an octahedron nickel nano micro-material. The preparation method comprises the following steps of: adopting a thermal decomposition-reduction process, that is to say: putting nickelous nitrate as a raw material into a vessel and carrying out thermal decomposition reaction with the reaction time of 30min to 10h and the reaction temperature of 30 to 500 DEG C; washing, filtering and drying gray black substances generated by the reaction to obtain an octahedron nickel oxide nano micro-material; and reducing the octahedron nickel oxide nano micro-material by adopting reducing gas at 300 to 450 DEG C to obtain the octahedron nickel nano micro-material. The invention has simple preparation flows, unique forming mechanism, easy industrial application and popularization, unnecessary addition of any die or plate surfactant or structure guiding agent in the reaction process, low cost and high efficiency; and the synthesized material has high purity, excellent microwave absorption performance and chemical catalysis effect as well as remarkable economic and social benefits and is suitable for preparing a catalyst or a microwave absorption material.

Description

technical field [0001] The invention relates to nickel nano-micro materials, in particular to a simple method for generating octahedral nickel nano-micro materials by using a thermal decomposition-reduction process. Background technique [0002] In recent years, the application of polymorphic nickel-based nano-micron materials (nickel, nickel oxide, etc.) in the fields of electromagnetic shielding and absorbing materials, rechargeable batteries, chemical catalytic materials, optoelectronic materials, and magnetic recording materials has attracted widespread attention. . On the one hand, it has the advantages of abundant raw materials, cheap price, and non-toxicity; on the other hand, it has the advantages of chemical stability, good oxidation resistance, strong electrical conductivity and ferromagnetic properties, and its high specific surface area and The volume effect is expected to lead to new physicochemical properties. The morphology of nanomaterials is the key factor...

AI Technical Summary

Problems solved by technology

However, the solid phase synthesis of Ni micro / nano octahedral particles has not been reported at home and abroad.

At the same time, the preparation methods published in these documents introduce a variety of chemical reagents, adopt complex multi-step template processes or use special active agents, so there are disadvantages such as low purity, complicated process, low efficiency, and high cost, which limit their application.

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