Method for preparing hollow nickel silicate microspheres by using silicon dioxide as template

A technology of silicon dioxide and nickel silicate, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., to achieve the effect of being suitable for mass production, convenient and easy temperature control, and overcoming the difficulty of temperature control

Inactive Publication Date: 2016-12-07
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has mild reaction conditions and overcomes the disadvantages of harsh conditions in high-pressure reactors, complicated processes, and difficulty in large-scale production. This method can produce hollow nickel silicate microspheres in large quantities under normal pressure.

Method used

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  • Method for preparing hollow nickel silicate microspheres by using silicon dioxide as template
  • Method for preparing hollow nickel silicate microspheres by using silicon dioxide as template
  • Method for preparing hollow nickel silicate microspheres by using silicon dioxide as template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Disperse 0.2g of nano-silica in 40mL of deionized water and ultrasonically disperse for 1 hour to make it uniformly dispersed and form a white emulsion. Then, 1 g of urea and 0.18 g of nickel nitrate were added to the homogeneously dispersed nano-silica solution, and the stirring and dispersion was continued for 30 minutes to obtain a green emulsion. Subsequently, the green emulsion was transferred to a three-necked flask, and kept condensing and refluxing for 12 hours at a reaction temperature of 100°C. The product was filtered, washed, and freeze-dried to obtain nickel silicate / silicon dioxide microspheres. The dried nickel silicate / silicon dioxide microspheres were treated with 50 mL of prepared 1 mol / L sodium hydroxide solution for 16 h. Subsequently, the product was washed, suction filtered, and vacuum freeze-dried to obtain a light green solid powder, which was the desired hollow nickel silicate microspheres. The morphology and structure of the obtained product ...

Embodiment 2

[0033] Put 2g as figure 1 and image 3 The nano silicon dioxide shown is dispersed in 400mL of deionized water and ultrasonically dispersed for 1 hour to make it uniformly dispersed and form a white emulsion. Then, 10 g of urea and 1.8 g of nickel nitrate were added to the homogeneously dispersed nano-silica solution, and the stirring and dispersion was continued for 30 minutes to obtain a green emulsion. Subsequently, the green emulsion was transferred to a three-necked flask, and kept condensing and refluxing for 24 hours at a reaction temperature of 95°C. The product was filtered, washed and dried in vacuum to obtain nickel silicate / silicon dioxide microspheres. The dried nickel silicate / silicon dioxide microspheres were treated with 500 mL of a prepared 1.5 mol / L sodium hydroxide solution for 16 hours. Subsequently, the product was washed, suction filtered, and vacuum freeze-dried to obtain a light green solid powder, which was the desired hollow nickel silicate microsp...

Embodiment 3

[0035] Disperse 0.2 g of silica nanospheres in 40 mL of deionized water and ultrasonically disperse for 1 h to make them uniformly dispersed and form a white emulsion. Then, 1 g of urea and 0.2 g of nickel acetate were added to the homogeneously dispersed nano-silica solution, and the stirring and dispersion was continued for 30 minutes to obtain a green emulsion. Subsequently, the green emulsion was transferred to a three-necked flask, and kept condensing and refluxing for 24 hours at a reaction temperature of 85°C. The product was filtered, washed and dried in vacuum to obtain nickel silicate / silicon dioxide microspheres. The dried nickel silicate / silicon dioxide microspheres were treated with 50 mL of prepared 1.2 mol / L potassium hydroxide solution for 14 h. Subsequently, the product was washed, suction filtered, and vacuum freeze-dried to obtain a light green solid powder, which was the desired hollow nickel silicate microspheres.

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Abstract

The invention discloses a simple mass preparation method for preparing hollow nickel silicate microspheres by using silicon dioxide as a template. The method comprises the following steps of firstly, performing ultrasonic dispersion on nanometer silicon dioxide into deionized water to obtain white emulsion; then, adding urea and water-soluble nickel salt; continuously performing uniform dispersion to obtain green emulsion; then, transferring the obtained green emulsion into a three-opening flask; performing condensing backflow for 1 to 24 hours under the condition of the temperature being 80 to 120 DEG C; finally, performing etching for 1 to 24h by alkali liquor; performing drying to obtain the hollow nickel silicate microspheres. The method has the advantages that the process is simple; the operation is simple and convenient; the preparation period is short; no pollution is caused in the process; the cost of the used raw materials is low; a special reaction container is not needed; the method is suitable for mass production.

Description

technical field [0001] The invention relates to the field of preparation of inorganic materials with a hollow structure, in particular to a method for preparing hollow nickel silicate microspheres using silicon dioxide as a template. Background technique [0002] Hollow microspheres are evolved from core / shell composite structure materials, and their properties can be controlled by adjusting the structure, size and composition of heterogeneous core / shell composite particles, so as to realize their optical, thermal, electrical, Large-scale tuning of magnetic and catalytic properties. Due to the characteristics of low density, high specific surface area, high stability and surface permeability of materials with this type of structure, and their hollow parts can accommodate a large number of guest molecules or large-sized guests, some peculiar microscopic "packages" can be produced. The nature of the effect makes hollow microsphere materials play an important role in many tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20
CPCC01B33/20C01P2004/03C01P2004/04
Inventor 倪伟王斌王挺程建丽李小东官群杨丹
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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