Method for preparing metallic oxide hollow nano-sphere

A technology of hollow nanometer and oxide, which is applied in the direction of granulating raw materials, chemical instruments and methods, microsphere preparation, etc., can solve the problems of uneven shape, poor controllability and repeatability, etc., and achieve easy removal, The size and thickness are controllable and the output is large

Inactive Publication Date: 2008-11-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the metal oxide hollow spheres are generally prepared by the template-free method or the soft template method, but due to the disadvantages of the above-mentioned method, such as poor controllability, poor repeatability, and uneven morphology, the application of metal oxide hollow spheres in lithium-ion batteries is limited.

Method used

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  • Method for preparing metallic oxide hollow nano-sphere
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  • Method for preparing metallic oxide hollow nano-sphere

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 1) Add 60 mg of silica spheres to 50 ml of 0.5 mol / L sodium chloride aqueous solution, and sonicate for 1 hour, then add 20 ml of 0.02 mol / L positively charged polyallylamine hydrochloride solution, and Stirring for 0.5 hour, polyallylamine hydrochloride is coated on the surface of the silica ball, and centrifugally cleaned with deionized water;

[0020] 2) Add 20 milliliters of 0.04 mol / liter negatively charged sodium polystyrene sulfonate solution, and stir for 0.5 hours, then centrifuge and wash with deionized water;

[0021] 3) Add 20 ml of 0.02 mol / L polyallylamine hydrochloride solution, and stir for 0.5 hour, then centrifuge and wash with deionized water;

[0022] 4) redisperse the product obtained in step 3) in 100 milliliters of deionized water, and add 0.5 mmol of tin chloride;

[0023] 5) Add 20 milliliters of 0.1 mol / liter sodium borohydride aqueous solution dropwise to the above solution, then centrifuge and dry, heat-treat under oxygen at 500°C for 3 hour...

Embodiment 2

[0026] 1) Add 60 mg of silicon dioxide spheres to 20 ml of 0.5 mol / L sodium chloride aqueous solution, and sonicate for 1 hour, then add 20 ml of 4 mol / L polyallylamine hydrochloride solution, and stir for 0.5 hour, Coating polyallylamine hydrochloride on the surface of silica balls, and centrifugally cleaning with deionized water;

[0027] 2) Add 20 ml of 0.02 mol / L sodium polystyrene sulfonate solution, and stir for 0.5 hour, then centrifuge and wash with deionized water;

[0028] 3) Add 20 ml of 0.4 mol / L polyallylamine hydrochloride solution, and stir for 0.5 hour, then centrifuge and wash with deionized water;

[0029] 4) redisperse the product obtained in step 3) in 100 milliliters of deionized water, and add 5 mmoles of tin chloride;

[0030] (5) Add dropwise 50 milliliters of 0.1 mol / liter sodium borohydride aqueous solution in the above solution, then centrifuge and dry, heat-treat for 5 hours under 500 DEG C of oxygen, then soak in 1% hydrofluoric acid solution of m...

Embodiment 3

[0032] 1) Add 120 mg of silicon dioxide spheres to 200 ml of 0.5 mol / L sodium chloride aqueous solution, and sonicate for 1 hour, then add 20 ml of 0.08 mol / L polyallylamine hydrochloride solution, and stir for 0.5 hour, Coating polyallylamine hydrochloride on the surface of silica balls, and centrifugally cleaning with deionized water;

[0033] 2) Add 20 milliliters of 0.04 mol / liter sodium polystyrene sulfonate solution, and stir for 0.5 hours, then centrifuge and wash with deionized water;

[0034] 3) Add 20 ml of 0.08 mol / L polyallylamine hydrochloride solution, and stir for 0.5 hour, then centrifuge and wash with deionized water;

[0035] 4) redisperse the product obtained in step 3) in 100 ml of deionized water, and add 1 mmol of indium chloride;

[0036] 5) Add dropwise 500 milliliters of 0.1 mol / liter sodium borohydride aqueous solution in the above solution, then centrifuge and dry, heat-treat under oxygen at 600°C for 3 hours, and then soak in a hydrofluoric acid so...

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Abstract

The invention relates to a preparation method of a metallic oxide hollow sphere, which adopts a silicon dioxide sphere as a template and combines the self-assembly of positive and negative charge layers and subsequent heat treatment to obtain the metallic oxide hollow sphere. The preparation method of the invention has the advantages that 1) the method utilizes the universal principle of the self-assembly of the positive and negative charge layers so as to be capable of preparing a plurality of metallic oxide hollow spheres; 2) the method adopts the silicon dioxide sphere as the template, thus having the advantages of controllable size and thickness, big capacity, simple removal of the template, etc.

Description

technical field [0001] The invention relates to a method for preparing oxide hollow nanospheres. Background technique [0002] Metal oxide bulk materials are widely used in optoelectronic fields such as lithium batteries, gas sensors, and ultraviolet detectors. Due to recent developments in nanotechnology, many properties different from bulk metal oxides have been discovered. For example, the tunability of the forbidden band width caused by the nanometer size effect, the discovery of laser light at room temperature, and the improvement of the performance of gas sensors and lithium batteries, etc. Among the existing nanostructures, hollow nano- or micro-spheres are considered to be a class of lithium-ion battery materials with great potential due to their high specific surface area, difficulty in agglomeration, and easy penetration of lithium ions in them. At present, the metal oxide hollow spheres are generally prepared by the template-free method or the soft template meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J2/00C04B35/622C04B35/626
Inventor 杨德仁杜宁张辉
Owner ZHEJIANG UNIV
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