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Preparation method for anatase titanium dioxide nanocrystalline mesoporous microsphere

A titanium dioxide, crystal mesoporous technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of using toxic solvents, high energy consumption, complex preparation process, etc., to facilitate separation and low energy consumption , the effect of simple process

Inactive Publication Date: 2015-07-22
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the products obtained by these processes do not have the structure of anatase titanium dioxide, nanocrystals and mesoporous microspheres at the same time, and there are generally deficiencies in the preparation process, high energy consumption, and even the use of toxic solvents.

Method used

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  • Preparation method for anatase titanium dioxide nanocrystalline mesoporous microsphere
  • Preparation method for anatase titanium dioxide nanocrystalline mesoporous microsphere
  • Preparation method for anatase titanium dioxide nanocrystalline mesoporous microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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 to prepare a butyl titanate solution;

[0026] b. Dissolving 1g of gelatin in acetic acid to prepare a gelatin solution with a mass concentration of 2%;

[0027] c. Slowly add the above-mentioned gelatin solution to the above-mentioned butyl titanate solution, stir evenly until the solution pH=4, and age the obtained solution at room temperature for 20 hours;

[0028] d. Dry the aged solution in an oven at 55°C to obtain a xerogel;

[0029] e. Boil the dry gel in deionized water for 50 minutes, filter and wash, wash with ethanol three times, and dry naturally in the air to obtain anatase TiO 2 Nanocrystalline mesoporous microspheres.

Embodiment 2

[0031] a. Using butyl titanate as a raw material and methanol as a solvent, slowly drop 10ml of butyl titanate into 50ml of methanol solution under rapid stirring to prepare a butyl titanate solution;

[0032] b. Dissolving 1g of gelatin in acetic acid to prepare a 5% gelatin solution by mass percentage;

[0033] c. Slowly add the above-mentioned gelatin solution to the above-mentioned butyl titanate solution, stir evenly until the solution pH=3, and age the obtained solution at room temperature for 30 hours;

[0034] d. Dry the aged solution in an oven at 50°C to obtain a xerogel;

[0035] e. Boil the dry gel in deionized water for 40 minutes, filter and wash with ethanol for 4 times, and dry naturally in the air to obtain anatase TiO 2 Nanocrystalline mesoporous microspheres.

Embodiment 3

[0037] a. Using butyl titanate as raw material and hexanediol as solvent, slowly drop 10ml butyl titanate into 20ml hexanediol solution under rapid stirring to prepare butyl titanate solution;

[0038] b. Dissolving 1g of gelatin in acetic acid to prepare a gelatin solution with a mass percentage of 3.5%;

[0039] c. Slowly add the above-mentioned gelatin solution to the above-mentioned butyl titanate solution, stir evenly until the solution pH=2, and age the obtained solution at room temperature for 40 hours;

[0040] d. Dry the aged solution in an oven at 45°C to obtain a xerogel;

[0041] e. Boil the dry gel in deionized water for 30 minutes, filter and wash with ethanol for 5 times, and dry naturally in the air to obtain anatase TiO 2 Nanocrystalline mesoporous microspheres.

[0042] Determination example:

[0043] attached Figure 2-5 is the TiO obtained in Example 2 2 Structure and performance analysis of nanocrystalline mesoporous microspheres.

[0044] figure 2...

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Abstract

The invention discloses a preparation method for an anatase titanium dioxide nanocrystalline mesoporous microsphere. A butyl titanate alcoholic solution is prepared from butyl titanate and alcohol; a gelatin solution is prepared by gelatin and acetic acid; the gelatin solution is slowly dropped into the butyl titanate alcoholic solution to obtain a sol solution; then the sol solution is aged and dried to obtain dry gel; the dry gel is put into distilled water for boiling; after filtration cleaning is executed, the product is cleaned through the alcohol and then is dried to obtain the anatase TiO2 nanocrystalline mesoporous microsphere. The preparation technology disclosed by the invention is simple and favorable for large-scale popularization and application, and a used solvent is safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing anatase-type titanium dioxide nanocrystal mesoporous microspheres. Background technique [0002] Nano-titanium dioxide is widely used in the fields of new dye-sensitized solar cells and photocatalysis due to its non-toxicity, weather resistance, chemical stability, high photoelectrochemical reactivity and ultra-high specific surface area. The nano-size effect not only brings a large specific surface area, but also greatly shortens the migration distance of the photogenerated electron-hole pairs to the liquid-solid interface, and promotes the separation of the photogenerated electron-hole pairs, thereby improving the photoelectric conversion efficiency and the catalytic performance of the catalyst. Photocatalytic efficiency. Unfortunately, due to the small particle size, it is difficult to recycle for catalytic use, the particle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B01J21/06B82Y30/00B82Y40/00
Inventor 刘斌姚义俊周凯苏义盛群许文婷王家凯张维炎
Owner NANJING UNIV OF INFORMATION SCI & TECH
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