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Titanium dioxide polyaniline composite nanometer tube array and preparation method thereof

A nanotube array, titanium dioxide technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve the problems of unique properties of unfavorable composite materials, limited application fields, weak force and other problems, and achieves simple and easy follow-up operations. , Improve the electron conductivity, the effect of uniform diameter

Active Publication Date: 2011-10-19
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Titanium dioxide is an important semiconductor functional material, which belongs to the electronic conductivity type (n-type) semiconductor. Although it has a high redox potential and strong photocatalytic activity, it is widely used in pollutant degradation, dye-sensitized solar cells and fuels. In terms of batteries, etc., due to its large band gap, the utilization rate of visible light is not high, which affects its large-scale application.
However, no matter it is a composite material or its preparation method, there are deficiencies. First, the TiO in the composite material 2 The nanotubes are not arranged in an orderly manner, but in a disorderly stacked state, which is extremely unfavorable for the full play of the unique properties of the nano-sized composite material and its subsequent operation; secondly, polyaniline is coated on TiO 2 The outer surface of the nanotube, and the two are only physically combined, and the mutual force is not strong, which is not conducive to electron conduction, but also suppresses its possible new excellent performance, which greatly limits its potential. Application field; again, the preparation method cannot make TiO 2 Composite tube array with orderly arrangement of nanotubes and polyaniline in the tubes

Method used

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  • Titanium dioxide polyaniline composite nanometer tube array and preparation method thereof
  • Titanium dioxide polyaniline composite nanometer tube array and preparation method thereof
  • Titanium dioxide polyaniline composite nanometer tube array and preparation method thereof

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Embodiment 1

[0022] The concrete steps of preparation are:

[0023] Step 1, first put the metal titanium sheet as the anode and the graphite sheet as the cathode in the electrolyte, and anodize at a DC voltage of 50V for 2.5 hours; wherein, the purity of the metal titanium sheet is 99.9%, and the electrolyte is composed of 0.2wt% It is formed by mixing ammonium fluoride, 1.6wt% of water and the balance of ethylene glycol. Then place it in deionized water or distilled water and ultrasonically clean it for 3 minutes and then dry it. Next, the anodized side is subjected to anodic oxidation for the second time under the same process conditions for 2.5 hours, and then it is washed and dried; wherein, the washing and drying process is performed after cleaning with ethanol. Drying at 50°C yields approximately figure 1 a TiO2 nanotube array with an inner diameter of 90 nm and a tube length of 30 μm shown in a.

[0024] In step 2, the titanium dioxide nanotube array is first heat-treated in wate...

Embodiment 2

[0027] The concrete steps of preparation are:

[0028] Step 1, first put the metal titanium sheet as the anode and the graphite sheet as the cathode in the electrolyte, and anodize at a DC voltage of 55V for 2.3 hours; wherein, the purity of the metal titanium sheet is 99.99%, and the electrolyte is composed of 0.25wt% It is formed by mixing ammonium fluoride, 1.7wt% water and the balance being ethylene glycol. Then place it in deionized water or distilled water and ultrasonically clean it for 3.5 minutes and then dry it. Then, the anodized side is first anodized for the second time under the same process conditions for 2.3 hours, and then it is washed and dried; wherein, the washing and drying process is cleaned with ethanol Drying at 50°C yields approximately figure 1 a TiO2 nanotube array with an inner diameter of 95 nm and a tube length of 25 μm.

[0029] Step 2, heat-treating the titanium dioxide nanotube array in water vapor at a temperature of 103°C for 28 minutes, a...

Embodiment 3

[0032] The concrete steps of preparation are:

[0033] Step 1, first put the metal titanium sheet as the anode and the graphite sheet as the cathode in the electrolyte, and anodize it at a DC voltage of 60V for 2 hours; wherein, the purity of the metal titanium sheet is 99.9%, and the electrolyte is composed of 0.3wt% fluorine It is formed by mixing ammonium chloride, 1.8wt% water and the balance being ethylene glycol. Then place it in deionized water or distilled water and ultrasonically clean it for 4 minutes and then dry it. Then, the anodized side was first anodized for the second time under the same process conditions for 2 hours, and then it was washed and dried; wherein, the washing and drying were cleaned with ethanol at 50 and dried at ℃ to obtain figure 1 a TiO2 nanotube array with an inner diameter of 100 nm and a tube length of 20 μm shown in a.

[0034] In step 2, the titanium dioxide nanotube array is first heat-treated in water vapor at a temperature of 105°C...

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Abstract

The invention discloses a titanium dioxide polyaniline composite nanometer tube array and a preparation method thereof. The array is formed by compounding polyaniline tubes in titanium dioxide nanometer tubes which are arranged sequentially, wherein the internal diameter of each titanium dioxide nanometer tube is between 90 and 110 nanometers, the tube length is between 10 and 30 micrometers, theexternal diameter of each polyaniline tube is between 90 and 110 nanometers, and the thickness of the tube wall is between 10 and 20 nanometers. The method comprises the following steps of: obtaininga titanium dioxide nanometer tube array by a secondary anodic oxidation process; putting the titanium dioxide nanometer tube array into water steam to perform heat treatment, and soaking the array inethanol solution of anilino methyl triethoxy silane to obtain an intermediate product of which anilino is attached to the inner walls of the titanium dioxide nanometer tubes; and soaking the intermediate product in hydrochloric acid aqueous solution of aniline, dripping the same amount of hydrochloric acid aqueous solution of ammonium persulfate into the hydrochloric acid aqueous solution of aniline, keeping the temperature at the temperature of 0 degree for at least 10 hours, and cleaning and drying the intermediate product to prepare the titanium dioxide polyaniline composite nanometer tubearray. The titanium dioxide polyaniline composite nanometer tube array can be widely used in aspects of photochemical catalysis, the construction of low-cost solar cells and the like.

Description

technical field [0001] The invention relates to a nanotube array and a preparation method thereof, in particular to a titanium dioxide polyaniline composite nanotube array and a preparation method thereof. Background technique [0002] Titanium dioxide is an important semiconductor functional material, which belongs to the electronic conductivity type (n-type) semiconductor. Although it has a high redox potential and strong photocatalytic activity, it is widely used in pollutant degradation, dye-sensitized solar cells and fuels. In terms of batteries, etc., due to its large band gap, the utilization rate of visible light is not high, which affects its large-scale application. The conductive polymer polyaniline is a hole-conducting (p-type) semiconductor, and has the advantages of good environmental stability, low cost, easy preparation and adjustable conductivity. For this reason, some attempts and efforts have been made to combine titanium dioxide and polyaniline to achiev...

Claims

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Application Information

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IPC IPC(8): B82B1/00B82B3/00
Inventor 苏浩费广涛郭霄欧阳浩淼
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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