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Method for preparing doped porous titanium dioxide

A technology of porous titanium dioxide and titanium oxide, applied in the field of porous materials, can solve the problems of low thermal stability of porous titanium dioxide, complicated and cumbersome steps, etc., and achieve the effects of high-efficiency photocatalytic activity, broad application prospects and low production cost.

Inactive Publication Date: 2011-08-10
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the porous titanium dioxide prepared by these methods have low thermal stability, and the steps are complicated and cumbersome.

Method used

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  • Method for preparing doped porous titanium dioxide
  • Method for preparing doped porous titanium dioxide
  • Method for preparing doped porous titanium dioxide

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preparation example Construction

[0032]a, preparation of hydrolyzed titanium solution: industrial titanyl sulfate solution (general F value is less than 2.45 and then thinks that main component is titanyl sulfate, and then thinks that main component is titanium sulfate when F value ≥ 2.45, therefore, in the hydrolyzed titanium solution of the present invention Titanium exists in the form of titanyl sulfate), add deionized water, sodium hydroxide solution and ferrous sulfate solution, adjust the total titanium concentration of the hydrolyzed titanium solution as TiO 2 The mass meter is 175±10g / L, the acidity coefficient F value (that is, the ratio of the total mass of sulfuric acid bound to titanium and free sulfuric acid to the mass of titanium dioxide) is 1.75-1.95, and the mass ratio of iron and titanium is 0.30-0.33;

[0033] b. Take deionized water with a volume of 20% to 50% of the volume of the hydrolyzed titanium solution as bottom water, and preheat to 90 to 98°C;

[0034] c. Preheat the hydrolyzed ti...

Embodiment 1

[0054] Embodiment 1 adopts the method of the present invention to prepare porous titanium dioxide

[0055] Take deionized water with a volume of 26% of the volume of the hydrolyzed titanium solution as bottom water and add it to the hydrolysis pot, and preheat to 95° C. under stirring. Add the titanium sulfate solution preheated to 95°C, the concentration is 175g / L, the F value is 1.87, and the iron-titanium ratio (referring to the mass ratio, the same below) is 0.31 into the hydrolysis pot at a uniform speed within 18 minutes, and the hydrolysis system is maintained during the feeding process The temperature is 95°C. After the feeding is completed, the temperature of the hydrolysis system is raised to the first boiling point (about 103° C.), and the heating rate is maintained at 1.00° C. / min to maintain the system in a slightly boiling state. When the system turns steel gray (that is, the gray point), stop heating and stirring, and ripen for 25 minutes. After the aging is c...

Embodiment 2

[0059] Embodiment 2 adopts the method of the present invention to prepare porous titanium dioxide

[0060] Take deionized water with a volume equal to 50% of the volume of the hydrolyzed titanium solution and add it into the hydrolysis pot as bottom water, and preheat to 92° C. under stirring. Add the titanium sulfate liquid preheated to 92°C, the concentration is 185g / L, the F value is 1.95, and the iron-to-titanium ratio is 0.33 into the hydrolysis pot at a uniform speed within 20 minutes, and the temperature of the hydrolysis system is maintained at 92°C during the feeding process. After the feeding is completed, the temperature of the hydrolysis system is raised to the first boiling point (about 104° C.), and the heating rate is kept at 1.20° C. / min to maintain the system in a slightly boiling state. When the system turns steel gray (that is, the gray point), stop heating and stirring, and ripen for 30 minutes. After the aging is completed, the temperature of the system i...

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Abstract

The invention relates to a method for preparing doped porous titanium dioxide, belonging to the field of porous materials and aiming to solve the technical problem of providing a method for preparing the doped porous titanium dioxide, which has lower production cost. The method comprises the following steps of: a, preparing a hydrolysis titaniferous solution; b, preheating de-ionized water serving as bottom water, of which the volume is 20 to 50 percent of the volume of the hydrolysis titaniferous solution, to a temperature of 90 to 98 DEG C; c, preheating the hydrolysis titaniferous solution prepared in the step a to a temperature of 90 to 98 DEG C, adding the preheated hydrolysis titaniferous solution into the bottom water, keeping the temperature of a hydrolysis system in the range of 90 to 98 DEG C in the charging process and keeping a stirring condition; d, after completing charging, warming the hydrolysis system to a boiling state and keeping the boiling state; e, when the color of the hydrolysis system is changed into steel grey, stopping stirring and heating, curing the hydrolysis system, then warming the hydrolysis system to the boiling state in the stirring state and keeping the boiling state until hydrolysis is completed; and f, filtering, washing, drying and grinding hydrolysis size obtained by hydrolysis, calcining the obtained product and grinding the calcined product to obtain the product.

Description

technical field [0001] The invention relates to a method for preparing doped porous titanium dioxide, which belongs to the field of porous materials. Background technique [0002] Titanium dioxide has the advantages of non-toxicity, stable physical and chemical properties and good semiconductor photoelectric properties, making it have good application prospects in catalysis, sterilization, water treatment, air purification, solar cells and self-cleaning materials. Due to its higher energy gap width, anatase titanium dioxide can strongly adsorb H 2 O, O 2 , OH - , and its own small grain size, large specific surface area, which is conducive to the improvement of its catalytic activity. [0003] Porous materials have a wide range of applications in the field of catalysis due to their own unique properties and structural characteristics. Since mesoporous titanium dioxide was first synthesized in 1995, porous titanium dioxide material has become a research hotspot due to its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/04B01J27/053
Inventor 田从学杨颖蒲洪
Owner PANZHIHUA UNIV
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