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Method for preparing titanium dioxide nanotube array

A technology of nanotube arrays and titanium dioxide, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of irregular arrays, uneven tube diameters, uneven surface of nanotubes, and achieve structural regularity. sequence, uniform distribution, and consistent surface

Inactive Publication Date: 2013-02-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-step anodic oxidation of this method solves the problems of uneven tube diameter, uneven surface of nanotubes, and irregular array, and obtains a more regular titanium dioxide nanotube array.

Method used

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  • Method for preparing titanium dioxide nanotube array
  • Method for preparing titanium dioxide nanotube array
  • Method for preparing titanium dioxide nanotube array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Titanium sheet (diameter 17mm, thickness 0.5mm) was sanded with sandpaper before anodizing until there was no scratches on the surface, and then mixed acid HF:HNO 3 :H 2 Soak in O=1:3:5 (volume ratio) for 5 minutes, ultrasonically clean with deionized water, and dry with nitrogen gas for use. At room temperature, use a platinum sheet (purity 99.95%) as a counter electrode, take 50 mL of electrolyte solution, apply an anode voltage of 40 V, and perform electrochemical anodic oxidation in an electrolytic cell. Take out the sample and clean it ultrasonically with deionized water, then place the sample in 0.05M HCl for 1 h, rinse with deionized water, and dry. The electrolyte composition and experimental conditions are shown in Table 1. Figure 1~2 It is a nanotube array prepared according to the conditions of Test Example 3 in Table 1. from figure 1 (A) It can be seen that the nanotube array is an upright and hollow structure, but the surface is uneven, the length of e...

Embodiment 2

[0027] Similar to Test Examples 1-5, the difference is that the base material used as the anode is the titanium sheet used in Test Examples 1-5 and treated with ultrasonic. At room temperature, using a platinum sheet (purity 99.95%) as a counter electrode, continuously using the electrolyte in Test Examples 1-5, applying an anode voltage of 40V, and performing electrochemical anodic oxidation in an electrolytic cell. The samples were taken out, ultrasonically cleaned with deionized water, and dried. The composition and experimental conditions of the electrolyte are shown in Table 2. Figure 3-5 It is a two-step oxidized nanotube array prepared according to the conditions of Test Example 8 in Table 2. from Figure 3-5 It is obvious that the array of nanotubes formed after the secondary oxidation is arranged regularly, the surface is flat, the diameter of the tubes is uniform, and the morphology characteristics are regular and orderly.

[0028] Table 2

[0029]

[0030] F...

Embodiment 3

[0032] The preparation method of the titanium dioxide nanotube array, the specific steps are to polish the surface of the titanium sheet with sandpaper, polish it with chemical polishing solution, and dry it for later use; prepare the electrolyte solution: the solute is fluoride, the solvent is water, and alcohol additives are added, the content of fluoride is 0.1wt% to 0.5wt% of the total mass of the electrolyte, the content of the alcohol additive is 80% to 99% of the total volume of the electrolyte, and the rest is solvent water; the alcohol additive is ethylene glycol, and the fluoride Ammonium fluoride; prepare a two-electrode system electrolytic cell, use the titanium sheet as the anode, and the platinum sheet as the counter electrode, and perform electrochemical anodic oxidation to form a layer of TiO on the surface of the titanium sheet 2 Nanotube array film; the anodized titanium sheet is ultrasonically cleaned and dried in an acid solution; the titanium sheet is used ...

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Abstract

The invention discloses a method for preparing a titanium dioxide nanotube array, which comprises the following steps: grinding the surface of a titanium sheet by using abrasive paper, polishing by using chemical polishing solution, and drying for later use; preparing electrolyte, wherein a fluoride is used as a solute, water is used as a solvent and an alcohol additive is added; preparing an electrolytic cell having two electrode systems, wherein a titanium sheet is used as an anode, a platinum sheet is used as a counter electrode, and a layer of TiO2 nanotube array can be formed on the surface of the titanium sheet by electrochemical anodic oxidation; subjecting the anodically oxidized titanium sheet to ultrasonic cleaning in acidic solution and drying; and performing anodic oxidation again by using the titanium sheet as the anode, and thus, forming the TiO2 nanotube array with uniform pipe diameter and flat surface on the surface of the titanium sheet. In the method, the problems of non-uniform tube diameter, uneven nantube surface and irregular array of two-step anodic oxidization are solved, and the titanium dioxide nanotube array with more regular shape is formed.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium dioxide nanotube arrays, and in particular relates to a method for preparing titanium dioxide nanotube arrays with uniform appearance. Background technique [0002] TiO 2 As an important inorganic functional material, nanotubes, compared with TiO 2 Nanopowder has a larger specific surface area and stronger adsorption capacity, so it exhibits higher hydrogen sensitivity, photoelectric conversion efficiency and photocatalytic performance, making it unbeatable in gas sensing materials, solar cells, photocatalysis, etc. The estimated potential application value has attracted extensive attention of researchers from various countries, and a large number of literatures have reported about TiO 2 Research on the preparation and application of nanotubes. [0003] Currently TiO 2 The preparation methods of nanotubes include photoelectrochemical etching, sol-gel, hydrothermal method, templ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
Inventor 刘松琴刘晓瑞朱文静
Owner SOUTHEAST UNIV
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