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Preparation method of titanium dioxide porous material

A porous material, titanium dioxide technology, applied in the field of materials, can solve problems such as unfavorable powder recovery, powder agglomeration, and influence on powder photocatalytic effect, and achieve good controllability of pore size and distribution, low cost, and short preparation cycle Effect

Inactive Publication Date: 2016-09-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smaller the particle size of nano-titanium dioxide particles, the more broken bonds on the surface, the greater the surface activity, and the greater the photocatalytic activity. It affects the photocatalytic effect of the powder, and is not conducive to the recovery of the powder in the process of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of titanium dioxide porous material, comprising the steps of:

[0016] (1) Measure 50mL of absolute ethanol and deionized water and mix them at a volume ratio of 1:3, stir evenly, weigh a certain amount of dispersant (made of ethylenediaminetetraacetic acid, citric acid, diethylenetriaminepenta Carboxylic acid, tartaric acid, ethylene glycol, and polyethylene glycol, wherein polyethylene glycol includes polyethylene glycol 400, polyethylene glycol 4000 and polyethylene glycol 6000) added to ensure that the components of the dispersant The concentration is controlled at 0.1mol / L. Stir to dissolve, then add titanium sulfate Ti(SO 4 ) 2 , and adjust the pH value to 8 after it dissolves to obtain the precursor solution.

[0017] (2) Put the precursor solution in a water bath at 80°C until it gels, and then dry it at 140°C to form a xerogel. After drying naturally at room temperature, the powder is ground and sieved.

[0018] (3) The sieved dry powde...

Embodiment 2

[0020] A preparation method of titanium dioxide porous material, comprising the steps of:

[0021] (1) Measure 50mL of absolute ethanol and deionized water and mix them at a volume ratio of 3:1, stir evenly, weigh a certain amount of dispersant (made of ethylenediaminetetraacetic acid, citric acid, diethylenetriaminepenta Carboxylic acid, tartaric acid, ethylene glycol, and polyethylene glycol) were added, and the concentration of each component of the dispersant was controlled at 0.01, 0.1, 0.1, 0.2, 0.5, and 0.5 mol / L, respectively. Stir to dissolve, then add titanium sulfate Ti(SO 4 ) 2 , and adjust the pH value to 5 after it dissolves to obtain the precursor solution.

[0022] (2) Put the precursor solution in a water bath at 85°C until it becomes gelatinized, then dry at 160°C to form a xerogel, dry it naturally at room temperature, and then grind and sieve the powder.

[0023] (3) The sieved dry powder is directly dry-pressed to form a block-shaped green body material...

Embodiment 3

[0025] A preparation method of titanium dioxide porous material, comprising the steps of:

[0026] (1) Measure 50mL of absolute ethanol and deionized water and mix them at a volume ratio of 1:1, stir evenly, weigh a certain amount of dispersant (made of ethylenediaminetetraacetic acid, citric acid, diethylenetriaminepenta Carboxylic acid, tartaric acid, ethylene glycol, polyethylene glycol) are added, and the concentration of each component of the dispersant is controlled at 0.03, 0.2, 0.2, 0.2, 0.1, 0.5 mol / L after adding. Stir to dissolve, then add titanium sulfate Ti(SO 4 ) 2 , and adjust the pH value to 6 after it dissolves to obtain the precursor solution.

[0027] (2) Put the precursor solution in a water bath at 80°C until it gels, and then dry it at 150°C to form a xerogel. After drying naturally at room temperature, the powder is ground and sieved.

[0028] (3) The sieved dry powder is directly dry-pressed to form a block-shaped green body material, and finally the...

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Abstract

The invention discloses a preparation method of a titanium dioxide porous material. The method comprises the following steps: synthesizing xerogel powder from titanium sulfate by adopting anhydrous ethanol and deionized water as solvents and ethylene diamine tetraacetic acid, citric acid, diethylenetriaminepentacarboxylic acid, tartaric acid, ethylene glycol and polyethylene glycol as dispersants, carrying out direct dry press molding on the xerogel powder to obtain a block material, and carrying out heat treatment to obtain the titanium dioxide porous material. The method has the advantages of simple technology, short period, simple device, low cost, and realization of high controllability of the dimensions and the distribution of apertures of the obtained porous material.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a preparation method of a titanium dioxide porous material. Background technique [0002] Nano-titanium dioxide is an efficient photocatalyst, which is widely used in air purification and degradation of organic matter. When preparing nano titanium dioxide powder, the microscopic morphology, particle size, crystal form and specific surface area of ​​the powder have a great influence on its photocatalytic performance. The smaller the particle size of nano-titanium dioxide particles, the more broken bonds on the surface, the greater the surface activity, and the greater the photocatalytic activity. It affects the photocatalytic effect of the powder, and is not conducive to the recovery of the powder in the process of application. Titanium dioxide porous material can not only maintain high surface activity and have higher photocatalytic efficiency, but also facilitate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/46
CPCC04B35/46C04B38/06
Inventor 伍媛婷栗梦龙仝轩江红涛
Owner SHAANXI UNIV OF SCI & TECH
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