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White hollow titanium dioxide microsphere and preparation method thereof

A technology of titanium dioxide and microspheres, which is applied in the field of preparation of new materials, can solve the problems of limited application, complex templates in the process, and increase of core-shell, etc., and achieve the effect of simple preparation process, easy-to-obtain raw materials, and uniform size

Inactive Publication Date: 2012-06-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The template method has great limitations. Usually, the prepared template needs surface modification or adding surfactants to increase the force between the core and the shell. The process is complicated and it is difficult to completely cover the template with effective means. Limits its application in display

Method used

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  • White hollow titanium dioxide microsphere and preparation method thereof
  • White hollow titanium dioxide microsphere and preparation method thereof
  • White hollow titanium dioxide microsphere and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0015] ① Disperse 0.07 g of organic copolymer microspheres of methyl methacrylate and ethyl acrylate in 60 mL of absolute ethanol, add 0.10 g of polyvinylpyrrolidone, add 0.30 g of butyl titanate under rapid stirring conditions, react for 120 min, and centrifuge After separation and freeze-drying, white spherical organic copolymer microspheres / titanium dioxide core-shell composite particles are obtained.

[0016] ②Put the organic copolymer microspheres / titanium dioxide core-shell composite particles in the air atmosphere and bake them at 500°C to obtain white hollow titanium dioxide microspheres with a uniform particle size of about 120nm and a relative density of 1.31g / cm 3 .

example 2

[0018] ① Disperse 0.07 g of organic copolymer microspheres of methyl methacrylate and butyl acrylate in 60 mL of absolute ethanol, add 0.10 g of polyvinylpyrrolidone, add 0.50 g of butyl titanate under rapid stirring conditions, react for 120 min, and centrifuge After separation and freeze-drying, white spherical organic copolymer microspheres / titanium dioxide core-shell composite particles are obtained.

[0019] ②The organic copolymer microspheres / titanium dioxide core-shell composite particles were calcined in the air atmosphere at 500°C to obtain white hollow titanium dioxide microspheres with a uniform particle size of about 140nm and a relative density of 1.38g / cm 3 .

[0020] Such as figure 1 Shown is the scanning electron micrograph of the white hollow titania microspheres that example 2 prepares; figure 2 It is an electrophoretic display effect diagram of white hollow titanium dioxide microspheres prepared in Example 2.

example 3

[0022] ① Disperse 0.07 g of organic copolymer microspheres of methyl methacrylate and ethyl acrylate in 60 mL of absolute ethanol, add 0.10 g of polyvinylpyrrolidone, add 0.50 g of butyl titanate under rapid stirring conditions, react for 120 min, and centrifuge After separation and freeze-drying, white spherical organic copolymer microspheres / titanium dioxide core-shell composite particles are obtained.

[0023] ②The organic copolymer microspheres / titanium dioxide core-shell composite particles were calcined in the air atmosphere at 700°C to obtain white hollow titanium dioxide microspheres with a uniform particle size of about 160nm and a relative density of 1.62g / cm 3 .

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Abstract

The invention relates to a white hollow titanium dioxide microsphere and a preparation method thereof. According to the invention, the particle size of the microsphere is 120-230 nm, and the relative density of the microsphere is 1.31-1.88g / cm<3>. The white hollow titanium dioxide microsphere is prepared from an organic matter copolymer microsphere utilized as a core and tetrabutyl titanate utilized as a precursor through static adsorption and a sol-gel reaction by freeze drying and high temperature roasting at air atmosphere. By using the preparation method provided by the invention, the defects in the traditional method are overcome; and an organic matter microsphere is used as a template so that the prepared white hollow titanium dioxide microsphere is regular in shape, uniform in size and easily controllable in particle size and thickness, and simultaneously the shell and hollow part of the hollow microsphere are different in refraction coefficients and good in light scattering properties due to the hollow structure. The white hollow titanium dioxide microsphere has the advantage of easily available raw materials and the preparation method has the advantage of simple preparation process.

Description

technical field [0001] The invention relates to the preparation technology of novel materials. The prepared white hollow titanium dioxide microspheres can be applied to the fields of microcapsule electrophoretic display, photocatalysis, dye-sensitized solar cells and the like. technical background [0002] With the further development of nanoscience and technology, people put forward wider and higher requirements for the preparation, properties and applications of nanomaterials. Hollow microspheres are a new type of structural material. This structure can have many new properties that cannot be obtained by ordinary particles, and has wider application prospects. The preparation of hollow microspheres is relatively difficult, and it is difficult to obtain them directly by general synthesis techniques. Titanium dioxide is an inorganic substance with good performance and wide application, which can be used in many fields such as catalysts, dyes, and hydrogen storage materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B01J13/02
Inventor 王世荣梅夜明李祥高柳志杰杨婷婷
Owner TIANJIN UNIV
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