Preparation method of manganese dioxide composite material

Abstract

The invention discloses a preparation method of a manganese dioxide composite material. The preparation method specifically comprises the following steps: S1, continuously stirring a surfactant, a cosurfactant and an oil phase to form a solution A; s2, dissolving 0.5-0.8 part of manganese dihydrogen phosphate and 0.1-0.2 part of cerium trichloride in 10 parts of water to obtain a solution B for later use, dropwise adding the solution B into the solution A, adding an acidic solution, uniformly mixing until the solution is clear, and continuously stirring until the solution is clear for the second time to form a microemulsion C; s3, adding 1-1.5 parts of melamine into 8-9 parts of an acid solution, stirring and hydrolyzing to obtain a hydrolysate D for later use, mixing the microemulsion C, the hydrolysate D and the halloysite suspension for reaction to form a mixed solution which is a solution E, and performing post-treatment to obtain a precursor. The preparation method of the manganese dioxide composite material disclosed by the invention has the effects of being simple and convenient, relatively low in cost, short in reaction period and easy to quickly prepare in a large scale.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a preparation method of a manganese dioxide composite material. Background technique [0002] Due to its unique physical and chemical properties, manganese dioxide nanomaterials are widely used in many fields such as lithium-ion batteries, ion exchange, molecular adsorption, zinc-manganese batteries, biosensors, catalyst materials, magnetic materials, and supercapacitors. However, when manganese dioxide is used as an electrode material, the resistance is large and the specific surface area of ​​the crystal grains is relatively small, which leads to its low utilization rate in the electrode reaction process. Therefore, it is of great significance to improve the specific surface area of ​​manganese dioxide catalytic materials. [0003] Semiconductor compounding is one of the important means to improve the properties of materials in terms of photochemistry and...

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Problems solved by technology

But, in order to obtain higher aldehyde, the catalyst consumption that ketone yield needs is very high, for example when producing benzaldehyde, the yield of γ crystal form manganese dioxide just can reach 100% when 8 equivalents, this catalyst consumption is quite astonishing and greatly increases the cost of production

Moreover, the oxidation object of this catalyst is allyl (benzyl) alcohol, and the applicant applied it to the reaction of oxidation of methanol into formaldehyde. The conversion rate of methanol and the yield of formaldehyde are far less than the ideal reaction effect involved in this patent.

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