Multi-shell-layer metal oxide hollow ball and preparation method thereof

A technology of hollow spheres and oxides, which is applied in the direction of oxide/hydroxide preparation, rare earth metal compounds, chemical instruments and methods, etc., can solve the problems that are difficult to apply to the synthesis of metal oxide multi-shell hollow spheres, and achieve excellent performance , good structural stability and simple process
CN102464304AActive Publication Date: 2012-05-23INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2012-05-23

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Abstract

The invention provides a multi-shell-layer metal oxide hollow ball and a preparation method thereof. A hydrothermal method is used for preparing a carbon ball template; metal salts are dissolved in carbon ball suspension liquid, and the gradient distribution, the depth and the number of metal salts entering carbon balls are controlled through regulating adsorption conditions such as metal salt concentration, solution pH value, soaking temperature and time and the like; and the heat treatment is carried out on the carbon balls adsorbing metal ions, and the multi-shell-layer metal oxide hollow ball can be obtained. The shell-layer of the hollow ball prepared by the method is formed by accumulating nanometer crystal particles of metal oxides, the shell layer number can be regulated and changed from two to four, and both the size of the hollow ball and the thickness of the shell layers are controllable. The method provided by the invention is simple and is easy to implement, the controllability is high, the pollution is little, the cost is low, and in addition, the general applicability is realized. The prepared product has a hollow structure and the shell layers with the thickness inthe nanometer level, simultaneously, the internal space can be effectively utilized through the multilayer structure, and the multi-shell-layer metal oxide hollow ball is applied to gas sensitivity and photocatalysis and has the more excellent performance through being compared with the traditional nanometer material and a single-layer hollow ball.
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Description

technical field

[0001] The invention belongs to the technical field of functional materials, in particular, the invention relates to a multi-shell metal oxide hollow sphere and a preparation method thereof. Background technique

[0002] Metal oxides are widely used in lithium batteries, gas sensors, ultraviolet detectors, drug delivery, and catalysis. Nano- or micro-scale multi-shell hollow spheres have the characteristics of low density, large specific surface, hollow structure, and multi-shells composed of nanoparticles, so they are widely used in fields related to surface properties, such as catalysts, drug buffers, etc. Release agents, gas-sensitive materials, photocatalytic materials, etc. In addition, it also has potential application value in photonic crystals, diagnostics, pharmacology, etc.

[0003] At present, there are few reports on the preparation of metal oxide multi-shell hollow spheres, and the preparation methods mainly include hard template method and soft...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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