Flower-shaped mesoporous titanium dioxide material and preparation method and application thereof

A mesoporous titanium dioxide, flower-like technology, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of no visible light response, limited application, low photocatalytic efficiency, etc., to improve electrochemical performance. , The process conditions are not harsh, and the preparation process is simple.

Inactive Publication Date: 2014-09-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide itself is a wide-bandgap semiconductor, which can only be excited in the ultraviolet band without visible light response, and the photogenerated electron-hole pairs are easy to recombine, and the photocatalytic efficiency is not high, which limits its application in the field of photocatalysis.

Method used

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  • Flower-shaped mesoporous titanium dioxide material and preparation method and application thereof
  • Flower-shaped mesoporous titanium dioxide material and preparation method and application thereof
  • Flower-shaped mesoporous titanium dioxide material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Add 1mL of 37% concentrated hydrochloric acid to 20mL of absolute ethanol, stir evenly, weigh 0.5g of P123 (8.62×10 -5 mol) was added to the above solution and stirred for 3 hours. Then, 2.96 mL (0.01 mol) of tetraisopropyl titanate was added to the above solution, and stirred for 16 hours. The entire solution system was placed in an oven at 40° C. for 12 hours, and the relative humidity was kept above 60%. Then, the obtained gel was crystallized at 80° C. for 12 hours, and the product was washed with ethanol under reflux and dried to obtain flower-shaped mesoporous titanium dioxide. In this process, under acidic conditions, the titanium source is self-assembled by nanorods under the action of surfactants to form flower-like mesoporous titanium dioxide. The size is about 3nm, and the specific surface area is 118m 2 g -1 about.

[0040] figure 1 is the scanning electron microscope image of flower-like mesoporous titanium dioxide, figure 2 is the XRD spectrum of t...

Embodiment 2

[0046] Add 3mL of 37% concentrated hydrochloric acid into 20mL of absolute ethanol, stir evenly, weigh 0.25g of P123 (4.31×10 -5 mol) was added to the above solution and stirred for 3 hours. Then, 2.96 mL (0.01 mol) of tetraisopropyl titanate was added to the above solution, and stirred for 12 hours. The entire solution system was placed in an oven at 80° C. for 24 hours, and the relative humidity was kept above 60%. Then, the obtained gel was crystallized at 90° C. for 6 hours, and the product was washed with ethanol under reflux and dried to obtain flower-shaped mesoporous titanium dioxide.

Embodiment 3

[0048] Add 5mL of 37% concentrated hydrochloric acid into 20mL of absolute ethanol, stir evenly, weigh 1.0g of P123 (1.72×10 -4 mol) was added to the above solution and stirred for 3 hours. Then, 2.96 mL (0.01 mol) of tetraisopropyl titanate was added to the above solution, and stirred for 16 hours. The entire solution system was placed in an oven at 60° C. for 12 hours, and the relative humidity was kept above 60%. Then, the obtained gel was crystallized at 80° C. for 12 hours, and the product was washed with ethanol under reflux and dried to obtain flower-shaped mesoporous titanium dioxide.

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Abstract

The invention discloses a flower-shaped mesoporous titanium dioxide material and a preparation method and application thereof. The material is prepared by the following method: 1) adding a template agent into a diluent, adding concentrated hydrochloric acid, and stirring evenly; 2) adding a titanium source into the solution, and stirring; 3) placing the solution in the conditions of the relative humidity above 60% at the temperature of 40-80 DEG C for 12h-24h, crystallizing at 80-90 DEG C for 6-12h; and 4) refluxing a sample to remove a surface active agent, and drying to obtain the flower-shaped mesoporous titanium dioxide. According to the method, high-temperature calcinations is not needed, the reaction synthesis temperature is lower than 100 DEG C, and the obtained flower-shaped mesoporous titanium dioxide material has the advantages of good monodispersity, high specific surface area and controllable crystalline phase and the like. The flower-shaped mesoporous titanium dioxide material can be used for negative electrode materials of a lithium ion battery, has high charge and discharge specific capacity, stable cycle performance, excellent high rate performance and very good photocatalytic activity, and can be used in the fields of degradation of organic pollutants, photocatalytic water splitting for hydrogen production, dye-sensitized solar cells and the like.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, in particular to a flower-shaped mesoporous titanium dioxide material and its preparation method and application. Background technique [0002] Energy crisis and environmental pollution have become two major challenges to the sustainable development of the current society. Fossil energy is a non-renewable resource with limited reserves. According to statistics, the existing proven reserves of fossil energy on earth will be exhausted in 200 years at the current rate of consumption. At the same time, the mining and use of fossil energy will cause serious environmental pollution and other problems. The increasingly serious resource, energy and environmental crisis has aroused global attention, so the development of renewable clean energy (such as solar energy, wind energy, etc.) has become an urgent task recognized by all countries in the world. Among them, energy storage is a key...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B82Y30/00B82Y40/00B01J21/06H01M4/485
CPCY02E60/122Y02E60/10
Inventor 李昱金俊黄绍专刘婧王超王洪恩吴旻陈丽华苏宝连
Owner WUHAN UNIV OF TECH
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