Method for preparing monodisperse submicron microsphere of titanium dioxide

A titanium dioxide, sub-micron technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of expensive precursors and solvents, difficulty in scale-up production, environmental pollution, etc., and achieve strong process operability and wide application prospects , low cost effect

Inactive Publication Date: 2013-01-16
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main disadvantages of this type of method are that the precursors and solvents are expensive, the use of a large amount of organic solvents in the hydrolysis process will cause environmental pollution, and it is difficult to scale up production due to the limitation of the hydrolysis process.

Method used

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  • Method for preparing monodisperse submicron microsphere of titanium dioxide
  • Method for preparing monodisperse submicron microsphere of titanium dioxide
  • Method for preparing monodisperse submicron microsphere of titanium dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of monodisperse submicron titanium dioxide microspheres, comprising the following steps:

[0031] Heat and dissolve ilmenite with a concentration of 80% sulfuric acid (mass ratio ilmenite: sulfuric acid = 1: 2) to obtain a solid phase deposit, leaching with water, filtering to remove insoluble slag, freezing and recrystallizing, and filtering to remove ferrous sulfate , to obtain titanium liquid; adjust the pH value of titanium liquid to 7 with ammonia water to obtain orthotitanic acid precipitation; get 100 g of the washed and filtered precipitate and disperse it in 55 ml of hydrogen peroxide solution with a mass concentration of 30% to obtain peroxide Titanium aqueous solution; under 0 ℃ of ice-water bath conditions, add 19.2ml, the mass percent concentration is the hydrazine hydrate aqueous solution of 80% to the obtained titanium peroxide aqueous solution, and the obtained mixed solution is aged at 0 ℃ for 72 hours, and the The obtained white em...

Embodiment 2

[0034] A preparation method of monodisperse submicron titanium dioxide microspheres, comprising the following steps:

[0035] Orthotitanic acid precipitate was obtained in the same manner as in Example 1.

[0036] Take 20g of orthotitanic acid precipitate and add 10ml, 30% hydrogen peroxide solution to dissolve; under the condition of ice-water bath at 0°C, add 10ml, 80% mass percent concentration of hydrazine hydrate aqueous solution to the obtained titanium peroxide solution to obtain The mixed solution was aged at 10°C for 24 hours to obtain a white emulsion; the obtained white emulsion was centrifuged at 2500rpm, and the obtained precipitate was sintered at 500°C for 2 hours to obtain monodisperse submicron titanium dioxide particles with a particle size of 200nm. ball.

[0037] Morphological characterization of the titanium dioxide submicron oxide microspheres obtained, the results are shown in figure 2 , it can be seen that titanium dioxide is well dispersed.

Embodiment 3

[0039] A preparation method of monodisperse submicron titanium dioxide microspheres, comprising the following steps:

[0040] Orthotitanic acid precipitate was obtained in the same manner as in Example 1.

[0041] Take 20g of orthotitanic acid precipitate and add 10ml, 30% hydrogen peroxide solution to dissolve; under the condition of ice-water bath at 0°C, add 10ml, 80% mass percent concentration of hydrazine hydrate aqueous solution to the obtained titanium peroxide solution to obtain The mixed solution was aged at 20°C for 12 hours to obtain a white emulsion; the obtained white emulsion was centrifuged at 2500rpm, and the obtained precipitate was sintered at 500°C for 2 hours to obtain monodisperse submicron titanium dioxide particles with a particle size of 100nm. ball.

[0042] Morphological characterization of the titanium dioxide submicron oxide microspheres obtained, the results are shown in image 3 , it can be seen that titanium dioxide is well dispersed; carry out...

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Abstract

The invention discloses a method for preparing monodisperse submicron microsphere of titanium dioxide, which comprises the following steps: adding a reducing agent in the aqueous solution of titanium peroxide at the temperature of 0 DEG C; aging the obtained mixed solution till the system is white emulsion; and sintering the white emulsion to obtain the monodisperse submicron microsphere of titanium dioxide. The method does not need expensive and harmful organic reagent, and is low in cost, strong in process operability and suitable for mass production.

Description

technical field [0001] The invention belongs to the preparation process of inorganic metal oxide monodisperse microspheres, in particular to the preparation method of monodisperse submicron titanium dioxide microspheres. Background technique [0002] As a functional inorganic material, monodisperse titanium dioxide has broad application prospects in coatings, catalysis, photoelectric conversion, electronic ink, functional ceramics and many other fields. It has always been the focus of research in the field of related functional materials. [0003] The performance of a material is not only related to its composition and basic structure, but also closely related to its shape. Therefore, the technology and process to control the preparation of functional materials with specific shapes has become a key issue in the application field of related functional materials. [0004] Monodisperse titanium dioxide microspheres have a uniform morphology and are the main raw materials for hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 只金芳吴良专
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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