Preparation method of needle-like nano zinc ferrite powder

Abstract

The invention relates to a preparation method of needle-like nano zinc ferrite powder, which comprises the following steps: (1) sequentially adding an additive, ethanol, sodium salicylate, soluble starch and carbamide into water while stirring, and continuing to uniformly stir; (2) dropwise adding a zinc citrate solution into the reaction solution under a stirring condition, and then dropwise adding a ferrous acetate solution to obtain a precursor turbid liquid; and (3) carrying out ultrasonic dispersion on the precursor turbid liquid and then filtering; washing the solid phase with water, andperforming heating to 400-500 DEG C. The acicular nano zinc ferrite powder obtained by the method disclosed by the invention is good in dispersity and not easy to agglomerate, and the preparation method is simple, convenient, green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for preparing needle-shaped nanometer zinc ferrite powder. Background technique [0002] Nano zinc ferrite (ZnFe 2 o 4 ) is an important functional material, which has been widely used in environmental materials, magnetic materials, new energy materials and other fields in recent years. At present, the methods for preparing nano zinc ferrite include coprecipitation method, solid phase method, solvothermal method, sol-gel method, template method, electrospinning method and so on. The patent of publication number CN101525156A discloses a preparation method of nano-zinc ferrite, which includes the following steps: under normal temperature and pressure, mix iron salt, zinc salt and cyclodextrin solution evenly, filter after magnetic stirring, and mix the product at 50 It is dried at ~150°C for 10-48 hours, and the dried product is calcined at 500-9...

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Problems solved by technology

The patent of publication number CN101525156A discloses a preparation method of nano-zinc ferrite, which includes the following steps: under normal temperature and pressure, mix iron salt, zinc salt and cyclodextrin solution evenly, filter after magnetic stirring, and mix the product at 50 Dry at ~150°C for 10-48 hours, and then bake the dried product at a high temperature of 500-900°C for 1-5 hours. Although the preparation method is simple, the prepared powder is easy to agglomerate

The patent with publication number CN109090139A discloses a preparation method and application of an antibacterial nano-zinc ferrite material. A simple co-precipitation method is used to prepare zinc ferrite nanoparticles at room temperature. Although the method is simple, the prepared powder There are also problems of easy agglomeration and large particle size

The patent with publication number CN110339813A discloses a nano-composite magnetic material for air purification and its preparation method. Although nano-zinc ferrite can also be prepared, the preparation process is very complicated.

Patent Publication No. CN110198783A discloses the preparation method of zinc ferrite catalyst, the first precipitate is obtained by contacting the zinc precursor solution with the alkaline solution, and the second precipitate is obtained by adding the iron precursor solution to the first precipitate , and then prepared by drying and firing processes. Although zinc ferrite powder can also be prepared, the process is cumbersome and the obtained powder has a large particle size, which is easy to agglomerate and has low activity.

The patent with publication number CN109806876A discloses a magnetic zinc ferrite / graphene nanocomposite photocatalyst and its preparation method and application. The preparation method of its zinc ferrite is to use diethylene glycol as a solvent and polyethylene glycol as a Appearance control agent, sodium lauryl sulfate as dispersant, using sodium acetate to hydrolyze to provide alkaline conditions, so that zinc ferrite can nucleate and grow uniformly on the surface of graphene, and the prepared zinc ferrite has better dispersibility, but graphite The high price of ethylene restricts its wide application

The patent of publication number CN109455766A discloses a kind of superfine zinc ferrite nanoparticle and its preparation method and gas-sensing application. The preparation method of its zinc ferrite is to first weigh zinc nitrate hexahydrate, ferric nitrate nonahydrate and ethanol solution and mix them. After the above mixture is evenly mixed, add ammonia water dropwise to the mixed solution, adjust the pH of the solution, stir the water bath and ultrasonically for 10-60 minutes, then transfer the mixed solution to a polytetrafluoroethylene-lined autoclave, and place it in a 150-230°C Reaction in an oven for 12 hours, centrifugal drying and other processes; although zinc ferrite nanoparticles can also be prepared, the process is very cumbersome and takes a long time

[0003] According to many research reports, the shape is the influence of nano-ZnFe 2 o 4 The important influencing factors of photocatalytic performance, bactericidal performance, magnetic performance, adsorption performance, etc., among which needle-shaped nano-zinc ferrite has excellent performance in the field of environmental purification and catalysis; currently needle-shaped and well-dispersed nano-iron The low-cost preparation method of zinc acid is rarely reported