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Method of preparing TiO2 nano pipe array by anodic oxidation method

A nanotube array, anodizing technology, applied in chemical instruments and methods, single crystal growth, polycrystalline material growth and other directions, can solve problems affecting applications, rough sidewalls of nanotubes, etc., to achieve simple operation, low energy consumption, The effect of simple process

Inactive Publication Date: 2007-08-15
TSINGHUA UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] (2)TiO 2 Nanotubes have rough sidewalls, affecting their applications

Method used

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  • Method of preparing TiO2 nano pipe array by anodic oxidation method
  • Method of preparing TiO2 nano pipe array by anodic oxidation method
  • Method of preparing TiO2 nano pipe array by anodic oxidation method

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preparation example Construction

[0033] 2) Preparation of electrolyte

[0034] The organic electrolyte solution is prepared by using dimethylformamide and hydrofluoric acid as main raw materials.

[0035] Preparation of the organic electrolyte solution: adding hydrofluoric acid into dimethylformamide according to a certain mass percentage (0.1-5% mass fraction), and mixing uniformly by magnetic stirring.

[0036] 3) Preparation of TiO by anodic oxidation 2 nanotube array

[0037] Using the above 1) pretreated titanium foil to prepare TiO in organic electrolyte 2 The steps of nanotube array are as follows:

[0038] Under the condition of constant voltage (10-40 volts) at room temperature, put the pretreated titanium foil and platinum sheet into the organic electrolyte for a period of time (more than 5 hours) to form a two-electrode system For the anodic oxidation reaction, the anodized samples were washed with deionized water and absolute ethanol, respectively, and then dried.

[0039] The technical solut...

Embodiment 1

[0041] 1. Polish the titanium foil with 400 mesh, 600 mesh, 800 mesh, 1000 mesh and 1200 mesh SiC sandpaper, and then use 0.05μm Al 2 o 3 Polished to a mirror finish. Put the polished titanium foil into acetone and deionized water for 10 minutes to ultrasonically clean it, and dry it for later use.

[0042] 2. 0.2 gram of hydrofluoric acid was added to 50 grams of dimethylformamide and mixed uniformly under magnetic stirring to prepare an organic electrolyte solution containing 0.4% hydrofluoric acid mass fraction.

[0043] 3. At room temperature, put the pretreated titanium foil and platinum sheet into the electrolyte of the dimethylformamide / hydrofluoric acid system synthesized in step 2 to form a two-electrode system. The anodic oxidation was carried out for 45 hours, and the obtained samples were washed with deionized water and absolute ethanol, respectively, and then dried.

[0044] TiO 2 The tube length of the nanotube array exceeds 20 microns, the tube diameter exce...

Embodiment 2

[0046] 1. Polish the titanium foil with 400 mesh, 600 mesh, 800 mesh, 1000 mesh and 1200 mesh SiC sandpaper, and then use 0.05μm Al 2 o 3 Polished to a mirror finish. Put the polished titanium foil into acetone and deionized water for 10 minutes to ultrasonically clean it, and dry it for later use.

[0047] 2. 0.6 gram of hydrofluoric acid was added to 50 grams of dimethylformamide and mixed uniformly under magnetic stirring to prepare an organic electrolyte solution containing 1.2% hydrofluoric acid mass fraction.

[0048] 3. At room temperature, put the pretreated titanium foil and platinum sheet into the electrolyte of the dimethylformamide / hydrofluoric acid system synthesized in step 2 to form a two-electrode system. The anodic oxidation was carried out for 30 hours, and the obtained samples were washed with deionized water and absolute ethanol, and then dried.

[0049] TiO 2 The tube length of the nanotube array exceeds 16.5 microns, the tube diameter exceeds 100 nano...

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Abstract

The invention discloses a preparing method of TiO2 nanometer pipe array with anodic oxidation method in photoelectric function film technical domain, which comprises the following steps: choosing dimethyl formamide and fluohydric acid as raw material; allocating organic electrolytic solution with mass percent of fluohydric acid at 0.1-5%; proceeding anodic oxidation reaction with the reacting time bigger than 5 h; growing the TiO2 nanometer pipe array with the length excesses 20 micrometer, pipe diameter excesses 100 nanometer and length-diameter ratio can reach above 200; setting the voltage at 10-40 volt; This method can be utilized to produce various photoelectron chemistry component, which possesses wide prospect in domains of light energy utilization, green energy development and waste water treatment.

Description

technical field [0001] The invention belongs to the technical field of photoelectric functional thin films, and in particular relates to a kind of TiO with high aspect ratio prepared by anodic oxidation method. 2 Methods for nanotube arrays. Background technique [0002] and other forms of nano-TiO 2 material compared to TiO 2 Nanotube arrays have the characteristics of regular morphology, large specific surface area, easy recovery and good regeneration, so TiO 2 The performance of nanotube arrays in photocatalysis, photoelectrochemistry and superhydrophilicity is obviously better than that of their corresponding bulk materials, especially in the fields of dye-sensitized solar cells, photocatalysts and self-cleaning materials, which have broad market application prospects. Due to TiO 2 The nanotube array can be used as a carrier to support dyes and conduct charges, and use its large specific surface area to increase the adsorption amount of dyes, achieve the purpose of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/28C30B30/02
Inventor 王晓慧杨阳李龙土
Owner TSINGHUA UNIV
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