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Method for synthesizing mesoporous nano titanium dioxide by rapid solgel process

A technology of nano-titanium dioxide and sol-gel method, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., to overcome the effect of long experimental period and simple process operation

Inactive Publication Date: 2012-01-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods still do not solve the shortcoming of the long period of the sol-gel method preparation process

Method used

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  • Method for synthesizing mesoporous nano titanium dioxide by rapid solgel process
  • Method for synthesizing mesoporous nano titanium dioxide by rapid solgel process
  • Method for synthesizing mesoporous nano titanium dioxide by rapid solgel process

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) At room temperature, add 200mL of absolute ethanol and 10mL of deionized water into a beaker, then use 5wt% dilute nitric acid to adjust the pH to 3-4, stir, and record as A;

[0023] (2) Take a small beaker, add 20mL absolute ethanol and 10mL butyl titanate respectively, mix well, record as B;

[0024] (3) Take 0.1g polyacrylamide (molecular weight: 3 million) and add it into 100g deionized water to prepare a solution with a mass concentration of about 0.1wt%, denoted as C;

[0025] (4) Slowly drop A into B, and keep stirring, continue to stir for 10 minutes after the addition, and then add 20mL of C solution dropwise. Continue to stir for 1 hour after the addition to obtain a wet gel;

[0026] (5) Put the wet gel in an oven and dry it at 80°C to remove the solvent and moisture to obtain a dry gel;

[0027] (6) Grind the xerogel in a mortar for 10 minutes, take it out and put it into a crucible, calcinate and crystallize at 350° C., and remove the template to obt...

Embodiment 2

[0030] (1) At room temperature, add 200mL of absolute ethanol and 10mL of deionized water into a beaker, then use 5wt% dilute nitric acid to adjust the pH to 3-4, mark it as A, and stir;

[0031] (2) Take a small beaker, add 20ml absolute ethanol and 10ml butyl titanate respectively, mix well, record as B;

[0032] (3) Get 15g polyethylene glycol (molecular weight is 20,000) and add 100g deionized water, the preparation mass concentration is the polyethylene glycol solution of 15wt%, denoted as C;

[0033] (4) Slowly drop A into B, and keep stirring, continue to stir for 10 minutes after the addition, and then slowly add 20ml of C solution dropwise. Continue to stir for 2h after adding until gelling;

[0034] (5) Put the wet gel in an oven and dry it at 90°C to remove the solvent and moisture to obtain a dry gel;

[0035] (6) Grind the xerogel in a mortar for 15 minutes, take it out and put it into a crucible, calcinate the crystal at 400° C., and remove the template agent t...

Embodiment 3

[0038] 1) At room temperature, first, use dilute nitric acid or dilute hydrochloric acid to adjust the mixed solution of absolute ethanol and water to a pH value of 3 to 4, then drop the ethanol solution of butyl titanate in a volume ratio of 1:1, and then Add dropwise 0.1wt% polyacrylamide (molecular weight: 3 million) aqueous solution and stir for 0.1 h to obtain a gel; wherein the volume ratio of absolute ethanol to water in the mixed solution of absolute ethanol and water is 18:1.

[0039] 2) Dry the gel in an oven at 60°C for 4 hours to remove the solvent and water to obtain a xerogel; grind the xerogel in a mortar, put it in a crucible, and calcinate and remove the template agent at a low temperature , to obtain mesoporous nano titanium dioxide, wherein the calcination temperature is 350°C.

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Abstract

The invention discloses a method for synthesizing mesoporous nano titanium dioxide by a rapid solgel process, which comprises the following steps of: first adjusting the pH value of a mixed solution of anhydrous ethanol and water to 3-4 with dilute nitrate or dilute chlorhydric acid, dripping an ethanol solution of tetrabutyl titanate by a volume ratio of 1: (1-5), then dripping 0.1-15wt% of polymer water solution, and agitating for 0.1-2h to obtain wet gel; putting the wet gel in an oven to dry at a temperature of 60-100 DEG C for 2-4h, and removing solvents and water to obtain dry gel; and grinding the dry gel in a mortar, putting in a crucible, calcinating at a low temperature and removing a template agent to obtain mesoporous nano titanium dioxide. The method for synthesizing mesoporous nano titanium dioxide by a rapid solgel process reserves the advantages of the solgel process of the prior art, overcomes the defect of long preparation period and can effectively shorten the preparation period.

Description

technical field [0001] The invention belongs to the field of photocatalytic material preparation, and relates to a method for synthesizing mesoporous nano-titanium dioxide, in particular to a method for synthesizing mesoporous nano-titanium dioxide by a rapid sol-gel method. Background technique [0002] Since Japanese scientists Fujishima and Honda [Fujishima A, Honda K. Electrochemical Photolysis of Water at a Semiconductor Electrode [J]. Nature, 1972, 238 (5358): 37-38.] discovered that titanium dioxide has photocatalytic properties in 1972, scientists A lot of research has been done on its preparation method and performance improvement. Titanium dioxide has become one of the most concerned photocatalysts due to its good chemical stability, non-toxicity, and light resistance. It has been used in photocatalytic hydrolysis for hydrogen production, sterilization, and dye-sensitized solar cells. [0003] At present, the common preparation methods of titanium dioxide include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06
Inventor 王向东秦雷郭晓玲刘二强
Owner XI AN JIAOTONG UNIV
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