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Method for preparing nanometer titanium dioxide

A technology of nano-titanium dioxide and propyl titanate, which is applied in the field of photocatalytic materials, can solve the problems of limited excellent performance, easy agglomeration of products, and high cost, and achieve the effects of inhibiting excessive growth, uniform particle size distribution, and reducing agglomeration

Active Publication Date: 2014-04-09
常熟紫金知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of titanium alkoxide as raw material and the addition of a large amount of organic reagents, the cost is high
Moreover, in this method, the dried precursor is directly calcined, and the product is easy to agglomerate, which limits the exertion of many excellent properties of the product.

Method used

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  • Method for preparing nanometer titanium dioxide
  • Method for preparing nanometer titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Using butyl titanate as a raw material and ethanol as a solvent, slowly drop 10ml of butyl titanate into 30ml of ethanol under rapid stirring with a magnetic stirrer to prepare a butyl titanate solution;

[0023] b. Dissolve 1g of gelatin in 49g of deionized water at a temperature of 85°C to prepare a gelatin solution with a concentration of 1% by mass;

[0024] c. Slowly add 10ml of the gelatin solution into 40ml of butyl titanate solution, stir evenly, slowly drop 20% hydrochloric acid into the mixed solution, adjust the pH of the solution to 2.7, stir quickly until the solution loses fluidity, A pale yellow gel was obtained;

[0025] d. Dry the yellow gel in an oven at 50°C for 5 hours to obtain a uniformly dispersed white powder;

[0026] e. Boil the white powder in deionized water for 10 minutes, filter the precipitate, wash the precipitate 3 times with deionized water, then wash 3 times with ethanol, and dry naturally in the air (volatilize ethanol) to obtain ...

Embodiment 2

[0030] a. Using ethyl titanate as raw material and methanol as solvent, slowly drop 10ml of ethyl titanate into 50ml of ethanol under rapid stirring with a magnetic stirrer to prepare ethyl titanate solution;

[0031] b. Dissolve 0.25g of gelatin in 49.75g of deionized water at a temperature of 80°C to prepare a gelatin solution with a concentration of 0.5% by mass;

[0032] c. Slowly add 20ml of the gelatin solution into 60ml of ethyl titanate solution, stir evenly, slowly drop nitric acid with a mass percentage of 20% into the mixed solution, adjust the pH of the solution to 2.1, and stir rapidly until the solution loses fluidity, A pale yellow gel was obtained;

[0033] d. Dry the yellow gel in an oven at 45°C for 6 hours to obtain a uniformly dispersed white powder;

[0034] e. Put the white powder into deionized water and boil for 20 minutes, filter to collect the precipitate, wash the precipitate with deionized water, then wash with ethanol 3 times, and dry naturally in...

Embodiment 3

[0038] a. Using propyl titanate as raw material and propanol as solvent, slowly drop 10ml of propyl titanate into 20ml of ethanol under rapid stirring with a magnetic stirrer to prepare a propyl titanate solution;

[0039] b. Dissolve 0.75g of gelatin in 49.25g of deionized water at a temperature of 75°C to prepare a gelatin solution with a concentration of 1.5% by mass;

[0040] c. Slowly add 6ml of the gelatin solution into 30ml of propyl titanate solution, stir evenly, slowly drop 20% hydrochloric acid into the mixed solution, adjust the pH of the solution to 3.8, stir quickly until the solution loses fluidity, A pale yellow gel was obtained;

[0041] d. Dry the yellow gel in an oven at 50°C for 4 hours to obtain a uniformly dispersed white powder;

[0042] e. Boil the white powder in deionized water for 10 minutes, filter the precipitate, wash the precipitate with deionized water, and then wash with ethanol for 3 times, and dry naturally in the air (volatilize ethanol) to...

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Abstract

The invention provides a method for preparing nanometer titanium dioxide, and belongs to the technical field of photocatalysis materials. The method comprises the following steps: preparing a titanate solution, and a gelatin solution with a mass percent concentration of 0.5%-1.5%, adding the gelatin solution into the titanate solution, stirring to obtain gel, drying the gel to obtain uniformly-distributed white powder, boiling, washing with water, washing with ethanol, and naturally drying in the air to obtain the nanometer titanium dioxide. The invention overcomes the deficiencies in current nanometer titanium dioxide sol-gel preparation technology, and provides a simple low-temperature preparation technology; the obtained nanometer titanium dioxide has uniform particle size distribution, and good dispersibility; the method of the invention prevents the nanometer titanium dioxide particles from agglomeration.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a low-temperature preparation method of nano titanium dioxide with anatase crystal form. Background technique [0002] Environmentally friendly photocatalytic technology has the characteristics of low energy consumption, easy operation, and no secondary pollution, and is expected to use solar energy, showing broad application prospects in organic synthesis, photolysis of water, and environmental governance. Titanium dioxide (TiO 2 ) has the characteristics of high photocatalytic activity, stable performance, no secondary pollution, cheap and easy to obtain, and is considered to be the most promising photocatalyst. In the field of photocatalytic technology, how to improve the photon quantum yield of photocatalytic reaction is the main problem faced by the application. The light absorption sideband boundary of nanoscale titanium dioxide is blue-shifte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y30/00B01J21/06
Inventor 刘斌姚义俊苏静沈国柱苏义
Owner 常熟紫金知识产权服务有限公司
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