Zinc ferrite hollow sphere with micro-nano structure and preparation method thereof

Abstract

The invention discloses a zinc ferrite hollow sphere with a micro-nano structure and a preparation method thereof. The hollow sphere is composed of zinc ferrite hollow spheres with a diameter of 1.5-3μm. Among them, the diameter of the zinc ferrite hollow sphere is 180-220nm, the thickness of the ball wall is 28-32nm, and the ball wall is composed of zinc ferrite nanoparticles; The method is to first prepare urea aqueous solution, trisodium citrate dihydrate aqueous solution, ferric chloride hexahydrate aqueous solution and zinc nitrate aqueous solution respectively, and then mix the urea aqueous solution and trisodium citrate dihydrate aqueous solution evenly, and successively mix ferric chloride hexahydrate The aqueous solution and the zinc nitrate aqueous solution are added to the obtained mixed solution and mixed evenly. After that, the obtained precursor solution is placed at 120-180°C for closed reaction, and then the obtained reaction solution is sequentially subjected to solid-liquid separation, washing and drying. target product. Its uniform size and large specific surface area make it extremely easy to be widely commercialized in the fields of photoconductive materials, water treatment, surface-enhanced Raman scattering and sensors.

Description

technical field [0001] The invention relates to a zinc ferrite hollow sphere and a preparation method, in particular to a micro-nano structure zinc ferrite hollow sphere and a preparation method thereof. Background technique [0002] Zinc ferrite (ZnFe) 2 O 4 ) is a spinel-type compound with ferric oxide as the main component. It has good catalytic activity, electrochemical performance and soft magnetic properties, and has been widely used in the fields of photoconductive materials, water treatment and sensors. application. At present, some beneficial attempts and efforts have been made in order to obtain zinc ferrite with higher catalytic activity, such as the titled "Catalytic Activity of Ferrates (NiFe 2 O 4 , ZnFe 2 O 4 and CoFe 2 O 4 ) on the ThermalDecomposition of Ammonium Perchlorate”, Propellants Explos.Pyrotech. 2019, 44, 1-10. (“Catalytic activity of ferrites (nickel ferrite, zinc ferrite and cobalt ferrite) on the thermal decomposition of ammonium perchl...

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Problems solved by technology

Though this product has better dispersibility, all there is weak point with its preparation method, at first, the size of product is inhomogeneous, when being used as catalyst, activity is difficult to control; Secondly, the specific surface area of ​​product is too small, The scope of application is restricted; again, the preparation method not only uses more types of raw materials, but also needs organic solvents, and also needs a long heating time, and it is impossible to obtain products with uniform size and large specific surface area.

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