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Method for preparing titanium oxide nano-wire array

A nanowire array, titanium dioxide technology, applied in titanium dioxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve the problems of uneven template filling, insufficient driving force, low filling rate, etc.

Inactive Publication Date: 2008-09-03
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sol penetrates into the nanopores of the template through capillary action, and the driving force is not large enough, so the pore blockage is easy to occur for the template with a small pore size, resulting in uneven filling of the entire template and a low filling rate; in addition, due to the sol The concentration should not be too large, the greater the concentration, the stronger the viscosity, and the more difficult it is for the colloidal particles to enter the nanopores. Therefore, even if the nanopores in the template are filled with colloids, the actual solid content is relatively low. In the subsequent heat treatment process Prone to shrinkage, deformation, fracture and other problems

Method used

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  • Method for preparing titanium oxide nano-wire array
  • Method for preparing titanium oxide nano-wire array
  • Method for preparing titanium oxide nano-wire array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The first step is to take a high-purity circular aluminum sheet with a diameter of 22mm and a purity of 99.99%, and perform surface pretreatment on it: put the high-purity aluminum sheet in acetone for ultrasonic cleaning, and after cleaning and drying, place the aluminum sheet at 400°C in a vacuum Anneal for 4 hours, then carry out electrochemical polishing in a mixture of absolute ethanol and perchloric acid with a volume ratio of 9:1, and the polishing current is 300mA / cm 2 , the polishing was carried out in an ice-water bath, and the polishing time was 90 seconds;

[0027] In the second step, place the aluminum sheet treated in the first step in an oxalic acid solution with a concentration of 0.3mol / l for the first anodic oxidation. The anode is the aluminum sheet, the cathode is a lead electrode, and the solution temperature is 10°C. , the voltage used for anodizing is 40V, and the time is 6 hours;

[0028] The third step is to immerse the aluminum sheet treated i...

Embodiment 2

[0035] The first step is to take a high-purity circular aluminum sheet with a diameter of 22mm and a purity of 99.99%, and perform surface pretreatment on it: put the high-purity aluminum sheet in acetone for ultrasonic cleaning, and after cleaning and drying, place the aluminum sheet at 400°C in a vacuum Anneal for 4 hours, then carry out electrochemical polishing in a mixture of absolute ethanol and perchloric acid with a volume ratio of 9:1, and the polishing current is 300mA / cm 2 , the polishing was carried out in an ice-water bath, and the polishing time was 90 seconds;

[0036] In the second step, place the aluminum sheet treated in the first step in an oxalic acid solution with a concentration of 0.3mol / l for the first anodic oxidation. The anode is the aluminum sheet, the cathode is a lead electrode, and the solution temperature is 10°C. , the voltage used for anodizing is 40V, and the time is 6 hours;

[0037] The third step is to immerse the aluminum sheet treated i...

Embodiment 3

[0044] The first step is to take a high-purity circular aluminum sheet with a diameter of 22mm and a purity of 99.99%, and perform surface pretreatment on it: put the high-purity aluminum sheet in acetone for ultrasonic cleaning, and after cleaning and drying, place the aluminum sheet at 400°C in a vacuum Anneal for 4 hours, then carry out electrochemical polishing in a mixture of absolute ethanol and perchloric acid with a volume ratio of 9:1, and the polishing current is 300mA / cm 2 , the polishing was carried out in an ice-water bath, and the polishing time was 90 seconds;

[0045] In the second step, place the aluminum sheet treated in the first step in an oxalic acid solution with a concentration of 0.3mol / l for the first anodic oxidation. The anode is the aluminum sheet, the cathode is a lead electrode, and the solution temperature is 10°C. , the voltage used for anodizing is 40V, and the time is 6 hours;

[0046] The third step is to immerse the aluminum sheet treated i...

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Abstract

The invention discloses a method for preparing a titanium dioxide nano-wire array, which belongs to the technology field of preparation of nano material. The method is realized by the following proposal: one side of an AAO template is coated with a working electrode; at the room temperature, a liquid A and a liquid B are prepared for reservation; the liquid A consists of the ethanol and the esters while the volume ratio of the ethanol and the esters is 15:4 to 15:3.5; the liquid B consists of the ethanol, an acetic acid and a deionized water while the volume ratio of the ethanol, the acetic acid and the deionized water is 15:4:1.8 to 15:4:2. The liquid A is added to the liquid B slowly while stirring and a nitric acid is added to regulate the PH value, then a sol which is stable at the room temperature is formed. The alumina template which is coated with the electrode is taken as a cathode; Electrophoretic deposition is carried out in the sol; then the titanium dioxide nano-wire array can be obtained when the template after electrophoretic deposition is annealed at a certain temperature. The method adopts the electrophoretic deposition to prepare the titanium dioxide nano-wire array in the alumina template, and the titanium dioxide nano-wire array has high filling ratio and is compact and can be widely used in the field of photocatalysis solar cell and dye-sensitized solar cell.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, in particular to a method for preparing titanium dioxide nanowire arrays by a template method. Background technique [0002] Nano-titanium dioxide has become a hot spot in the field of material research due to its broad application prospects in photocatalysis, solar cells, and photolysis of water. At present, researches on titanium dioxide nanopowders and nanofilms are more common, while studies on titanium dioxide nanowires and tubes are less. Compared with nanofilms, titanium dioxide nanowires and tubes have a larger specific surface area. At the same time, because photogenerated carriers can migrate long distances in the axial direction of nanowires and tubes, the probability of recombination of electrons and holes is reduced. Therefore, The use of template assembly technology to prepare titanium dioxide nanowires and tube arrays is expected to improve the efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82B3/00
Inventor 林煜
Owner HUAQIAO UNIVERSITY
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