Preparation method of core-shell structured micro-nanosphere comprising magnetic core and magnesium silicate nano-sheet shell

Abstract

The invention discloses a preparation method and use of a core-shell structured micro-nanosphere comprising a magnetic ferroferric oxide core and a magnesium silicate nano-sheet shell. The method comprises the following steps: preparing a monodisperse ferroferric oxide nanosphere; covering the surface of the ferroferric oxide nanosphere with a layer of monox to generate a core-shell structured Fe3O4@SiO2 micronsphere, wherein the monox coated on the surface not only serves a mold plate inducing function, but also serves as a reaction raw material of the core-shell structure; and finally, dissolving monox in a stable alkali condition through a microwave water heating process to generate silicates, carrying out reaction between the silicates and magnesium ions on the surface of the ferroferric oxide nanosphere to generate mutually staggered magnesium silicate nanosheets. Therefore, the core-shell structured micro-nanosphere comprising the magnetic core and the magnesium silicate nano-sheet shell can be obtained. The method can be widely applied to the aspects of sewage treatment, molecular sieves, drug carriers, gas absorption and separation, and catalysis, and is low in cost, environment-friendly, uniform in products, and simple to operate.

Description

technical field [0001] The invention relates to a preparation method of a core-shell structure micro-nano ball composed of a magnetic core and a magnesium silicate nanosheet shell layer. Background technique [0002] In recent years, the synthesis and research of core-shell micro-nanospheres have attracted much attention in the field of nanotechnology. Due to their unique morphology and excellent physical and chemical properties, core-shell micro-nanospheres have potential applications in many fields, including lithium-ion battery cathode materials, catalyst supports, gas sensors, drug delivery and controlled release, and environmental protection. Water pollution control. Environmental water pollution especially heavy metal ion Pb 2+ 、Cd 2+ , Hg 2+ Water pollution caused by water pollution is an environmental problem of worldwide concern. Heavy metal ions can be continuously enriched through precipitation, adsorption and food chain, destroying the ecological environment...

AI Technical Summary

Problems solved by technology

At present, in the method of removing heavy metal ions in water pollution, adsorption method is considered to be an effective method for removing heavy metal ions, and various nano-adsorbents such as carbon nanotubes and metal oxide nanomaterials are widely used to remove heavy metal ions in polluted water. However, these nanoadsorbents have disadvantages such as small adsorption capacity, difficult separation, and easy agglomeration, which limit their application in real environments.

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