Method for rapidly preparing nanocrystalline zinc-iron hydrotalcite

Abstract

The invention relates to a method for rapidly preparing nanocrystalline zinc-iron hydrotalcite. The method comprises the following steps of: performing solution preparation, heating, stirring, water circulation condensing, nitrogen protection and a combination reaction under oxygen oxidation with a uniform precipitation method by taking zinc sulfate and ferrous sulfate as raw materials, taking hexamethylene tetramine as a precipitating agent, taking deionized water as a solvent and a washing agent, taking absolute ethanol as a washing agent, taking nitrogen as protection gas and taking oxygen as an oxidant; and washing, performing suction filtration, drying in vacuum, grinding and screening to obtain nanocrystalline zinc-iron hydrotalcite. The preparation method has the advantages of advanced and precise process, high preparation speed, detailed and accurate data and high product purity, which can be up to 99 percent; the product zinc-iron hydrotalcite is an irregular hexagonal flaky crystal which is less than or equal to 80 nanometers in diameter, and can be matched with a plurality of chemical substances; and the method is very ideal method for rapidly preparing nanocrystalline zinc-iron hydrotalcite.

Description

technical field [0001] The invention relates to a rapid preparation method of nanocrystalline zinc-iron-like hydrotalcite, belonging to the technical field of preparation and application of layered double metal hydroxides of inorganic materials. Background technique [0002] Hydrotalcite-like compounds are composed of positively charged hydroxide laminates and interlayer anions. Due to the compatibility of the laminate cations and the wide selectivity of the interlayer anion groups, the hydrotalcite-like material is a relatively Multifunctional inorganic materials with great application potential. [0003] Zinc-iron hydrotalcite has become an important functional material because of its application prospects in the fields of electricity, magnetism, light and catalysis. 2+ , Fe 3+ The chemical environment for the formation of hydroxides is very different, and its synthesis is relatively difficult, and there are only a few reports on the synthesis research, for example: Meng...

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Problems solved by technology

[0003] Zinc-iron hydrotalcite has become an important functional material because of its application prospects in the fields of electricity, magnetism, light and catalysis. 2+ , Fe 3+ The chemical environment for the formation of hydroxides is very different, and its synthesis is relatively difficult, and there are only a few reports on the synthesis research, for example: Meng Weiqing et al. use Zn 2+ , Fe 2+ ZnFe was synthesized by co-precipitation method using NaOH as raw material and NaOH as precipitant III Hydrotalcite-like; Teruhisa Hongo et al. use Zn 2+ , Fe 2+ As raw material, NaOH was used as precipitant to synthesize ZnFe III and ZnFe II Fe III Hydrotalcite-like; M.S.Gasser et al. use Zn 2+ , Fe 3+ As raw material, NaOH is used as precipitant to synthesize ZnFe III hydrotalcites; although these methods prepared ZnFe III Hydrotalcite-like materials, but there are still some process disadvantages, some process parameters are not accurate, the product purity is low, some products have no obvious structural characteristics, it is difficult to match with other chemical substances, some process methods are more complicated, and the preparation cost is high. , it is difficult to carry out industrial production

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