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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

Active Publication Date: 2012-05-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned soft template methods are only suitable for the preparation of specific compound hollow spheres mentioned in the literature, and it is difficult to apply to the synthesis of other metal oxide multi-shell hollow spheres.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Firstly, the carbon sphere template was prepared with sucrose by the hydrothermal method: 5.5 g of sucrose was dissolved in 10 ml of water, and the solution was put into a reaction kettle, and heated in water at 200 ° C for 80 min. After the product was filtered, washed and dried, the obtained carbon About 0.4 g of the balls was placed in 10 ml of deionized water, and ultrasonicated for 3 minutes to obtain a suspension of carbon balls.

[0025] Impregnation: 8g, 16g, 20g of Fe(NO 3 ) 3 9H 2 O was added to the above suspension of carbon spheres and stirred evenly (that is, the concentration of the metal salt was 2 mol / L, 3 mol / L, 5 mol / L respectively), then ultrasonicated for 15 min, and then stirred at room temperature for 5 h, and the suspension was filtered and washed , and then dried at 100°C for 12 hours, and the obtained powder material was carbon spheres adsorbed with metal ions.

[0026] Heat treatment: Finally, the obtained powder was heated to 500° C. at a r...

Embodiment 2

[0029] First, use glucose to prepare carbon sphere templates by hydrothermal method: dissolve 11 g of glucose in 10 ml of water, put the solution into a reaction kettle, and heat it in water at 160°C for 50 minutes. After the product is filtered, washed, and dried, the obtained carbon spheres About 0.4 g was put into 10 ml of deionized water, and ultrasonicated for 30 min to obtain a suspension of carbon spheres.

[0030] Impregnation: 5.5g of Zn(CH 3 COO) 2 ·6H 2O was added to the above suspension of carbon spheres and stirred evenly (that is, the metal salt concentration was 2.5 mol / L), then ultrasonicated for 15 min, and then stirred at room temperature for 20 h, the suspension was filtered and washed, and then dried at 100°C for 12 h. The obtained powdery material is carbon spheres adsorbed with metal ions.

[0031] Heat treatment: Finally, the obtained powder was heated to 800° C. at a rate of 5° C. / min in a muffle furnace in an air atmosphere and kept for 3 hours to r...

Embodiment 3

[0034] Firstly, the carbon sphere template was prepared with sucrose by the hydrothermal method: 5.5 g of sucrose was dissolved in 10 ml of water, and the solution was put into a reaction kettle, and heated in water at 200 ° C for 80 min. After the product was filtered, washed and dried, the obtained carbon About 0.4 g of the balls was placed in 10 ml of deionized water, and ultrasonicated for 15 minutes to obtain a suspension of carbon balls.

[0035] Impregnation: 8.7g of Co(NO 3 ) 2 ·6H 2 O was added to the above suspension of carbon spheres and stirred evenly (that is, the metal salt concentration was 3 mol / L), then ultrasonicated for 15 min, and then stirred at room temperature for 10 h, the suspension was filtered and washed, and then dried at 100°C for 12 h to obtain The powdered material is carbon spheres adsorbed with metal ions.

[0036] Heat treatment: Finally, the obtained powder was heated up to 400°C at a rate of 1°C / min in a muffle furnace in an air atmospher...

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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.

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

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Application Information

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IPC IPC(8): C01B13/14C01G49/06C01G9/02C01G51/04C01G53/04C01G3/02C01F17/00B82Y40/00
Inventor 王丹赖小勇毛丹
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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