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Method for preparing titanium dioxide nanocrystalline electrode

A titanium dioxide and nanocrystal technology, applied in capacitor electrodes, photosensitive devices, electrical components, etc., can solve the problems of weak bonding between titanium dioxide particles and substrates, disordered growth, etc., and achieve good conductivity, low cost, and simple methods.

Inactive Publication Date: 2011-10-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a flexible electrode that uses carbon cloth as a substrate to grow a titanium dioxide nanorod array on the surface. The method uses a microwave method to prepare a composite structure of a titanium dioxide nanorod array that is uniformly grown on the carbon cloth surface, effectively It solves the problem of weak combination of titanium dioxide particles and the substrate and disordered growth in the conventional photoanode preparation process

Method used

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  • Method for preparing titanium dioxide nanocrystalline electrode
  • Method for preparing titanium dioxide nanocrystalline electrode
  • Method for preparing titanium dioxide nanocrystalline electrode

Examples

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Effect test

Embodiment 1

[0019] A mixed solution is directly prepared with butyl titanate, hydrochloric acid and water, wherein the volume percentage of butyl titanate is 4.8%, the volume percentage of hydrochloric acid is 48%, and the rest is water. Put the above mixed solution into a microwave digestion tank, add carbon cloth, put the digestion tank into a microwave chemical workstation, set the temperature at 180°C for microwave heating and reaction for 50 minutes, and obtain a titanium dioxide nanocrystalline electrode. It can be seen that a neat layer of titanium dioxide nanorod arrays is uniformly grown on the surface of carbon fibers, but a small amount of carbon fibers are not completely covered by titanium dioxide nanorods.

Embodiment 2

[0021] The carbon cloth was cleaned, that is, acetone, water, and alcohol were used in sequence, and ultrasonic waves were used for 30 minutes each to obtain a cleaned carbon cloth. Prepare a mixed solution from butyl titanate, hydrochloric acid and water, wherein the volume percentage of butyl titanate is 4.8%, the volume percentage of hydrochloric acid is 48%, and the rest is water. Put the above mixed solution into a microwave digestion tank, and then add Put the processed carbon cloth into the microwave chemical workstation, set the temperature at 180°C for microwave heating for 50 minutes, and obtain a carbon cloth with a layer of titanium dioxide film firmly attached on the surface, that is, a titanium dioxide nanocrystalline electrode.

[0022] The acetone used in the cleaning step of the method is used to clean the organic impurities on the carbon cloth, water is used to wash away the dust, and alcohol is used for the final cleaning process, and can be dried quickly to ...

Embodiment 3

[0025] The carbon cloth was cleaned, that is, acetone, water, and alcohol were used to sonicate for 60 minutes each to obtain a cleaned carbon cloth. Prepare a mixed solution from butyl titanate, hydrochloric acid and water, wherein the volume percentage of butyl titanate is 4.5%, the volume percentage of hydrochloric acid is 41%, and the rest is water. Put the above mixed solution into a microwave digestion tank, and then put Put in the treated carbon cloth, put the digestion tank into the microwave chemical workstation, set the temperature at 170°C for microwave heating for 1 hour, and obtain a layer of titanium dioxide nanorod arrays firmly attached to the surface of the carbon cloth, as can be seen from the scanning electron microscope photos It can be seen that compared with the electrode in Example 2, the titanium dioxide nanorods are slightly thinner and are still arranged vertically on the surface, with no significant difference.

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Abstract

The invention provides a method for preparing a flexible electrode, wherein titanium dioxide nanorod arrays grow on a surface of a carbon fabric regarded as a substrate. The method comprises the following steps of: (1) putting the carbon fabric in a solution formed by mixing butyl titanate, hydrochloric acid and water, wherein the percent by volume of the butyl titanate is 4%-5%, the percent by volume of the hydrochloric acid is 41%-52%, and the balance is water; and (2) heating the carbon fabric contained mixed solution at a temperature of 170-200 DEG C for 40-60 minutes by adopting microwaves to obtain a titanium dioxide nanocrystalline electrode. Prior to the step (1), the method further comprises a cleaning step, in which the carbon fabric is subjected to ultrasonic processing for 30-60 minutes by respectively using acetone, water and ethanol. The method effectively solves the problems of infirm bonding between titanium dioxide granules and the substrate, and disordered growing in the conventional photoanode preparing process; for the first time, the titanium dioxide nanorod arrays evenly and firmly grow on the surface of the carbon fabric, and are synthesized once only; and the method is simple, has low cost for the reacting raw materials, is efficient and fast, thereby being favorable for popularization.

Description

technical field [0001] The invention belongs to the field of photoelectric conversion solar cells, in particular to a method for preparing a titanium dioxide nanocrystal electrode used in dye-sensitized solar cells. Background technique [0002] Titanium dioxide is a widely used material, commonly known as titanium dioxide or titanium dioxide, mainly used as pigments, photocatalysts, etc. In recent years, with the extensive research on nanomaterials, nanocrystalline titanium dioxide has received more and more attention. Nano-titanium dioxide is mainly used as an electrode material in the field of dye-sensitized solar cells. Morphology has an important impact on performance. So far, nanowires, nanorods, nanotubes, particles and three-dimensional composite structures composed of these basic shapes have been studied. The main synthesis methods are sol-gel Glue method, hydrothermal method, chemical vapor deposition method (see Chemical Reviews magazine, volume 107, issue 7, pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/20H01M14/00
CPCY02P70/50
Inventor 陈娣王卓然沈国震
Owner HUAZHONG UNIV OF SCI & TECH
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