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A kind of preparation method of anatase phase tio2 nanometer hollow sphere

An anatase phase, hollow sphere technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as nano hollow spheres to be explored, and achieve low cost, simple process equipment, The effect of uniform spacing

Inactive Publication Date: 2015-09-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used preparation methods of nano-TiO hollow spheres include template method, sol-gel method, hydrothermal method, layer-by-layer self-assembly method, etc., but at present, anatase phase TiO with good dispersion and uniform particle size distribution has been prepared. 2 Nanohollow spheres still to be explored

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An anatase phase TiO 2 A method for preparing hollow nanospheres, comprising the steps of:

[0016] (1) Prepare a LiCl aqueous solution with a mass concentration of 0.1%, and prepare an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia respectively, wherein the amount of absolute ethanol in solution A and solution B is equal, and the total amount of absolute ethanol is equal to The volume ratio of ammonia water is 5:1, the volume ratio of the amount of ammonia water to tetraethyl orthosilicate is 1.5:1, then add 1mL of LiCl aqueous solution to solution B, the volume ratio of LiCl aqueous solution to ammonia water is 1:1, and then Add solution A to solution B under constant stirring. After 20 hours of reaction, the precipitate is separated, washed by centrifugation and dried at 50°C to obtain surface-modified SiO 2 nanosphere particles;

[0017] (2) Weighing SiO2 2 Nanoparticles, ultrasonically dispersed in ethanol, ultrasonic time is...

Embodiment 2

[0021] An anatase phase TiO 2 A method for preparing hollow nanospheres, comprising the steps of:

[0022] (1) Prepare a LiCl aqueous solution with a mass concentration of 0.2%, respectively configure an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia water, wherein the amount of absolute ethanol in solution A and solution B is equal, and the total amount of absolute ethanol is equal to The volume ratio of ammonia water is 16.7:1, the volume ratio of the amount of ammonia water to tetraethyl orthosilicate is 2.5:1, then add 3mL of LiCl aqueous solution to solution B, the volume ratio of LiCl aqueous solution to ammonia water is 1:10, and then Add solution A to solution B under constant stirring. After 22 hours of reaction, the precipitate is separated, washed by centrifugation and dried at 60°C to obtain surface-modified SiO 2 nanosphere particles;

[0023] (2) Weighing SiO2 2 Nanoparticles, which were ultrasonically dispersed in methanol...

Embodiment 3

[0027] An anatase phase TiO 2 A method for preparing hollow nanospheres, comprising the steps of:

[0028] (1) Prepare a LiCl aqueous solution with a mass concentration of 0.12%, and prepare an ethanol solution A of tetraethyl orthosilicate and an ethanol solution B of ammonia respectively, wherein the amount of absolute ethanol in solution A is equal to that in solution B, and the total amount of absolute ethanol is equal to The volume ratio of ammonia water is 12.25:1, the volume ratio of the amount of ammonia water to tetraethyl orthosilicate is 2.05:1, then add 2mL of LiCl aqueous solution to solution B, the volume ratio of LiCl aqueous solution to ammonia water is 1:5.5, and then Add solution A to solution B under constant stirring. After 21 hours of reaction, the precipitate is separated, washed by centrifugation and dried at 55°C to obtain surface-modified SiO 2 nanosphere particles;

[0029] (2) Weighing SiO2 2 Nanoparticles, ultrasonically dispersed in ethanol, the...

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Abstract

The invention discloses a method for preparing an anatase TiO2 nanometer hollow sphere. The method can prepare the anatase TiO2 nanometer hollow sphere which is uniform in size distribution and has good dispersibility. According to the method, LiCl is taken as a surface modifier, ethyl orthosilicate is taken as a raw material to prepare monodisperse silicon dioxide nanometer spherical particles, ITO (indium tin oxide) is taken as an electrode and substrate to prepare silicon dioxide colloidal crystal templates of different arrangement structures, the colloidal crystal templates are vertical in the titanium oxide sol for ageing and padding, ans after calcining, the silicon dioxide templates are removed so as to obtain the anatase TiO2 nanometer hollow sphere.

Description

technical field [0001] The invention relates to an anatase phase TiO 2 Preparation method of nano hollow spheres. Background technique [0002] Nano-titanium dioxide has a high specific surface area and good photocatalytic activity. It can be used in photocatalysts, solar cell materials, anti-ultraviolet materials, bactericidal materials, sensor materials, etc., but it is easy to agglomerate, especially in the degradation of pollutants. Disadvantages of recycling. Nano-titanium dioxide hollow spheres have low density, high specific surface area, good surface permeability, high refractive index, high surface chemical activity, and high catalytic performance. They are widely used in photocatalysts, coatings, photoelectric conversion, chemical sensors, drug delivery, Medical imaging, hydrogen production, etc. The crystal forms of titanium oxide mainly include anatase phase, rutile phase and brookite phase. The first two phases are stable phases and are widely used. Among the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y40/00B82Y30/00
Inventor 伍媛婷江红涛王秀峰
Owner SHAANXI UNIV OF SCI & TECH
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