Preparation method for super long titanium dioxide nanotube array with photocatalytic performance

A technology of nanotube arrays and titanium dioxide, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of reduced surface area, reduced catalytic performance, and inhibition of large-scale application of nano-titanium dioxide. Effect of surface area, high UV absorption properties

Inactive Publication Date: 2008-05-28
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, research on titanium dioxide nanopowders is more common, such as the method described in patent No. 01133230.1 or

Method used

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  • Preparation method for super long titanium dioxide nanotube array with photocatalytic performance
  • Preparation method for super long titanium dioxide nanotube array with photocatalytic performance
  • Preparation method for super long titanium dioxide nanotube array with photocatalytic performance

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The pure titanium is processed into a sample of 100mm×10mm×1mm by mechanical processing. After pretreatment, the applied voltage is 30V, and the volume ratio of ethylene glycol is 97%, the volume ratio of water is 2.5%, and the HF acid The volume ratio is 0.5%, and the anodic oxidation is carried out for 22 hours in the electrolyte solution whose pH value is adjusted to 6. The titanium dioxide nanotube array was washed with deionized water several times, placed in a drying oven, and dried at 70° C. to 80° C. for 1 hour. The morphology of the titanium oxide nanotube array prepared by this process is shown in Fig. 2 .

Embodiment 2

[0028] The titanium is processed into a sample of 100mm×10mm×1mm by mechanical processing. After pretreatment, the applied voltage is 70V, and the volume ratio of ethylene glycol is 97%, the volume ratio of water is 2.5%, and the volume of HF acid The ratio is 0.5%, and the pH value is adjusted to 6 in the electrolyte solution, and anodized for 60 hours. The titanium dioxide nanotube array was washed with deionized water several times, placed in a drying oven, and dried at 70° C. to 80° C. for 1 hour. The morphology of the titanium oxide nanotube array prepared by this process is shown in Fig. 3 .

Embodiment 3

[0030]The titanium alloy TLM is processed into a sample of 100mm×10mm×1.4mm by mechanical processing. After pretreatment, the applied voltage is 70V, and the volume ratio of ethylene glycol is 98%, the volume ratio of water is 1.0%, HF The volume ratio of the acid is 1.0%, and the pH value is adjusted to 7 in the electrolyte solution, anodized for 72 hours, the titanium dioxide nanotube array is washed with deionized water several times, placed in a drying oven, and dried at 70°C to 80°C for 1 hour . The morphology of the titanium oxide nanotube array prepared by this process is shown in Fig. 4 .

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Abstract

The invention provides a process for preparation of super-long titanium dioxide nano-tubes arrays, which is provided with catalytic performance. The process for preparation is that titanium or titanium alloys are utilized as anode after surface treatment. Ionic compound with halogen atoms is utilized as solutes, which is dissolved in anhydrous organic solvents to utilize as electrolyte. Platinum electrode is counter electrode. After anodizing and high-temperature annealing, TiO2 nano-tubes arrays of which length is at 30-190 mu m and diameter of tube is at 20-200nm can be achieved on titanium or titanium alloys. The combination of the super-long highly orderly titanium dioxide nano-tubes arrays and matrix, which is prepared by the invention, is more firmly than the combination of traditional titania film and matrix. Film thickness of the super-long highly orderly titanium dioxide nano-tubes arrays is at 30-190 mu m. Thickness which is at the range of the film thickness of the super-long highly orderly titanium dioxide nano-tubes arrays is provided with higher photoelectric conversion efficiencies, which is favorable to application of the super-long titanium dioxide nano-tubes arrays in the field of photocatalysis, solar cell, sensor and the like.

Description

technical field [0001] The invention relates to a treatment method for modifying the surface function of titanium-based metals, in particular to a preparation method for an ultra-long titanium dioxide nanotube array with photocatalytic performance. Background technique [0002] Nano-titanium dioxide itself is non-toxic, harmless, non-corrosive, and has semiconductor characteristics; under the action of photocatalysis, organic pollutants can be completely mineralized into water and inorganic ions, and at the same time, there is no secondary pollution. It is a kind of green environmental management material with broad application prospects, which has attracted widespread attention from all over the world. At present, the research on titanium dioxide nanopowder is relatively common, such as the method described in patent No. 01133230.1 or the synthesis technology described in patent 02147872.4. The decline has inhibited the scale application of nano-titanium dioxide. [0003]...

Claims

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Application Information

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IPC IPC(8): C25D3/28C30B30/02C30B29/16C30B29/62C01G23/047B01J21/06B01J35/06
Inventor 奚正平张文彦李广忠汪强兵李亚宁
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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