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Flowerlike-structure titanium dioxide formed by spindle single crystal and preparation method thereof

A titanium dioxide and flower-like structure technology, applied in the field of flower-like titanium dioxide composed of spindle-shaped single crystals and its preparation, can solve the problems of controllable and difficult one-step synthesis, and achieve rapid synthesis, uniform products, and simple preparation methods Effect

Inactive Publication Date: 2012-07-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]TiO2 is a wide bandgap semiconductor material with stable properties, non-toxic, large specific surface area, high surface activity, light absorption Good performance and other advantages, anatase titanium dioxide has been widely used in environmental purification technology and dye-sensitized solar cells, is an important material for electron transport and transfer, due to the TiO2 single crystal Morphology and structure are closely related to their photoelectric conversion performance. Therefore, the synthesis of anatase phase TiO2 single crystals with various morphologies has attracted extensive attention. Studies have shown that the one-dimensional anatase phase TiO2 nanostructures (such as nanotubes, nanorods, nanofibers, etc.) have many advantages in the photoelectric conversion process, but their controllability and one-step synthesis are still difficult

Method used

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  • Flowerlike-structure titanium dioxide formed by spindle single crystal and preparation method thereof
  • Flowerlike-structure titanium dioxide formed by spindle single crystal and preparation method thereof
  • Flowerlike-structure titanium dioxide formed by spindle single crystal and preparation method thereof

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Embodiment 1

[0018] Example 1: The preparation method of the flower-like structure titanium dioxide composed of the spindle-shaped single crystal includes a surfactant-assisted microwave hydrothermal method, and the completion steps are as follows:

[0019] (1) First prepare a 0.05mol / l titanium sulfate aqueous solution, then add urea to it, control the molar ratio of titanium sulfate and urea to 1:4, and finally add disodium edetate to control the concentration of titanium sulfate and ethylene diacetate. The molar ratio of disodium amine tetraacetate is 1:1;

[0020] (2) After 2.5 hours of magnetic stirring, a white suspension was obtained, which was added to the liner of the polytetrafluoroethylene autoclave, and then the polytetrafluoroethylene autoclave was put into a microwave reactor, the reaction temperature was 180°C, and the holding time was 10 minutes ;

[0021] (3) After the reaction is completed, after the PTFE autoclave is naturally cooled, the reaction product is taken out...

Embodiment 2

[0022] Example 2: The preparation method of the flower-like structure titanium dioxide that is made of spindle-shaped single crystal includes surfactant-assisted microwave hydrothermal method. The completion steps are as follows: first dissolve 0.002mol titanium sulfate in 40ml water, then add 0.4mol urea therein, and finally Add 0.002mol disodium ethylenediamine tetraacetate, stir magnetically for 3.5h to obtain a white suspension, put it into a polytetrafluoroethylene autoclave liner, and the filling degree of the polytetrafluoroethylene autoclave liner is about 50%. Then put the autoclave into a microwave reactor, the reaction temperature is 180°C, and the holding time is 10 minutes. After the reaction is completed, after the autoclave is naturally cooled, the reaction product is taken out, washed repeatedly with deionized water and absolute ethanol to remove the surfactant, and finally Put the product into an oven at 70° C. and dry for 10 hours to obtain the flower-shaped...

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Abstract

The invention discloses a flowerlike-structure titanium dioxide formed by spindle single crystal and a preparation method thereof. The method includes firstly preparing 0.05mol / 1 titanic sulfate aqueous solution, then adding urea and ethylenediaminetetraacetic acid disodium salt, obtaining white suspension by magnetic stir for 3 hours, placing the mixture in an autoclave liner with polytetrafluoroethylene, then placing the autoclave in a microwave reaction instrument at a reacting temperature of 180 DEG C and keeping heating insulation for 10 minutes until the reaction is finished and the natural cooling of the autoclave is finished, taking out reaction products, repeatedly washing the products by using deionized water and anhydrous ethanol to remove surfactants, finally drying the products in a drying box at the temperature of 70 DEG C, and obtaining finished products. According to the flowerlike-structure titanium dioxide formed by spindle single crystal and the preparation method thereof, the titanium dioxide can be widely used in technologies of depollution of environment and dye-sensitized solar cells, and the method has the advantages of being rapid in synthesis, uniform in products and simple in operating and the like.

Description

technical field [0001] The invention relates to a microwave rapid one-step preparation method of a flower-like structure titanium dioxide composed of a spindle-shaped single crystal, which uses a simple surfactant-assisted microwave hydrothermal method to quickly prepare a flower-like structure anatase composed of a spindle-shaped single crystal in one step phase titanium dioxide. Background technique [0002] TiO 2 It is a wide-bandgap semiconductor material with the advantages of stable properties, non-toxicity, large specific surface area, high surface activity, and good light absorption performance. Titanium dioxide in the anatase phase has been widely used in environmental purification technology and dye-sensitized solar energy In batteries, it is an important material for electron transport and transfer, because TiO 2 The morphology and structure of a single crystal have a great relationship with its photoelectric conversion performance, so the synthesis of anatase T...

Claims

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Application Information

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IPC IPC(8): C30B29/16C30B29/60C30B7/10
Inventor 杨勇汪国忠康升红王惠敏刘岗邓泉
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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