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A method for preparing composite mixed crystal powder of titanium dioxide and titanium pentoxide

A technology of trititanium pentoxide and titanium dioxide is applied in the field of preparation of titanium oxide, which can solve the problems of application limitation, serious agglomeration of titanium oxide powder, etc., and achieves the effect of simple operation and expansion of the application field.

Active Publication Date: 2021-05-28
NINGBO XINFU TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of titanium dioxide powder is mainly the titanium dioxide reduction method, which is to use hydrogen, carbon black, metal titanium and carbon monoxide and other reducing agents to heat to a certain temperature in a vacuum or an inert gas atmosphere and keep it for a certain period of time to reduce titanium dioxide to prepare the required powder. Due to the high temperature of solid-solid reaction or gas-solid reaction, the generated titanium dioxide powder is seriously agglomerated, and the powder morphology is mainly spherical or worm-like, which limits its application in the fields of photocatalysis and electrochemistry.

Method used

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  • A method for preparing composite mixed crystal powder of titanium dioxide and titanium pentoxide
  • A method for preparing composite mixed crystal powder of titanium dioxide and titanium pentoxide
  • A method for preparing composite mixed crystal powder of titanium dioxide and titanium pentoxide

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Dissolve 15g of tetrabutyl titanate in 200ml of alcohol-water mixture (the volume ratio of ethanol to water is 3:1) at normal temperature and pressure, stir well, and adjust the pH value to 1 with hydrochloric acid or sodium hydroxide , stirred to obtain a clear solution, which was designated as solution A.

[0042] (2) At the same time, dissolve 5 g of trisodium citrate dihydrate in 500 ml of water, stir evenly to obtain a clear aqueous solution, the concentration of trisodium citrate dihydrate is 10 g / L, and slowly add it to the stirring solution A to form solution B , solution B was ultrasonicated at room temperature with an ultrasonic intensity of 50 kHz for 30 minutes.

[0043] (3) 15g of titanium trichloride solution (Sinopharm Group Chemical Reagent Co., Ltd.) is dissolved in 80ml of ethylene glycol, stir to obtain a clear solution, and it is quickly added to the solution B in the uniform stirring under nitrogen protection simultaneously, Solution C was form...

Embodiment 2

[0047] (1) Dissolve 20g of isopropyl titanate in 200ml of alcohol-water mixture (the volume ratio of ethanol to water is 4:1) at normal temperature and pressure, stir well, and adjust the pH value to 3 with hydrochloric acid or sodium hydroxide , stirred to obtain a clear solution, which was designated as solution A.

[0048] (2) At the same time, dissolve the mixture of 8g of sodium pyrophosphate and anhydrous sodium acetate in 100mL of water, stir evenly to obtain a clear aqueous solution, wherein the mass ratio of anhydrous sodium pyrophosphate and anhydrous sodium acetate is 1:1; slowly add into the stirring solution A to form a solution B, and the solution B was ultrasonicated at room temperature with an ultrasonic intensity of 20 kHz for 40 minutes.

[0049] (3) 12g titanium trichloride solution (Sinopharm Group Chemical Reagent Co., Ltd.) is dissolved in 50ml ethylene glycol, stir to obtain a clear solution, and it is quickly added to the solution B in the uniform stirr...

Embodiment 3

[0053] (1) Dissolve 15g of metatitanic acid in 150ml of alcohol-water mixture (the volume ratio of ethanol to water is 2:1) at normal temperature and pressure, stir evenly, adjust the pH value to 5 with hydrochloric acid or sodium hydroxide, and stir , to obtain a clear solution, denoted as solution A.

[0054] (2) At the same time, dissolve 15g of trisodium citrate dihydrate in 100mL of water, stir evenly to obtain a clear aqueous solution with a concentration of 150g / L, and slowly add it to the stirring solution A to form solution B, which is in Ultrasonication was carried out at room temperature with an ultrasonic intensity of 50 kHz for 30 minutes.

[0055] (3) Dissolve 20g of titanium trichloride solution (Sinopharm Group Chemical Reagent Co., Ltd.) in 100ml of ethanol, stir evenly to obtain a clear solution, and quickly add it to solution B in uniform stirring under nitrogen protection to form a solution C, then the solution C was stirred for 1 hour, and it was placed i...

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Abstract

The invention relates to a method for preparing a composite mixed crystal powder of titanium dioxide and titanium pentoxide, comprising: 1) dissolving a titanium source in an alcohol-water mixture, and adjusting the pH value to 1-5 to obtain a clear solution A; 2) Prepare an aqueous solution of a surfactant, add it to a clear solution A, and mix it ultrasonically to obtain a solution B; 3) Add the titanium trichloride solution to the alcohol, and after fully dissolving, add it to the solution B under the protection of an inert gas, Forming solution C; 4) After stirring the solution C, it is sealed and placed in a high-pressure reactor, and the reaction is carried out under heating conditions. After the reaction is completed, the compound mixed crystal powder is obtained through separation and washing. The preparation method is simple to operate, and the compound mixed crystal powder can be obtained only through simple dissolving, mixing and heating operations.

Description

technical field [0001] The invention relates to the field of preparation of titanium oxide, in particular to a method for preparing composite mixed crystal powder of titanium dioxide and trititanium pentoxide. Background technique [0002] Titanium dioxide (TiO 2 ) is one of the most important metal oxides in industrial applications. It has a wide range of applications, from plastics, coatings, papermaking, inks, medicines to cosmetics, photocatalysts, photovoltaic cells, photoelectric cells, sensors, etc. There are good application reports . There are three common crystal forms of titanium dioxide, which are anatase, rutile, and brookite. It is generally believed that titanium dioxide will first generate anatase phase, and then present a mixed phase of anatase and brookite at different temperatures, a mixed phase of brookite and rutile phase, and finally generate a high-temperature phase rutile phase. [0003] The method of preparing titanium dioxide can be divided into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C01G23/04B82Y30/00
CPCB82Y30/00C01G23/043C01G23/053C01P2002/72C01P2004/03
Inventor 邵国雄晏育刚陆祥芳刘志慧童育峰傅黎丽张静海
Owner NINGBO XINFU TITANIUM DIOXIDE