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Preparation method of magnetic-doped titanium dioxide nanotube

A technology of magnetic doping and titanium dioxide is applied in the field of preparation of magnetic nanotubes and magnetically doped titanium dioxide nanotubes, which can solve the problems of low photoelectric conversion efficiency and doping of nanotubes, and achieve wide market application prospects and huge economic benefits. Value, the effect of rapid recovery and regeneration

Inactive Publication Date: 2010-11-24
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two kinds of light absorption: one is the utilization rate of light. According to the research of Grimes group, the photoelectric conversion efficiency of non-parallel light incidence is higher than that of parallel light incidence; the other is to change the wavelength of absorbed light, which can be changed mainly through doping. TiO 2 There are many doping ions, such as Cd ions, Fe ions, Ag ions, etc. Most of the research on the addition of these ions is through doping in the electrolyte, or in TiO 2 After the nanotubes are formed, these ions are introduced through some chemical methods. These methods cannot achieve high-efficiency doping, and some are just simple loading. The photoelectric conversion efficiency of the prepared nanotubes is not very high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Prepare TiO according to the following specific steps 2 nanotube:

[0024] (1) Under the protection of argon gas, the pure iron powder and pure titanium powder are uniformly ball-milled on a planetary ball mill at a mass ratio of 1:4 to obtain a mixed powder, which is put into a vacuum melting furnace for smelting, and CNC wire cutting is used Processed into ferro-titanium alloy foil with a thickness of 1mm;

[0025] (2) Titanium-iron alloy foils were ultrasonicated in acetone, absolute ethanol, and distilled water for 10 minutes respectively to remove surface oil and other impurities;

[0026] (3) Put the decontaminated titanium-iron alloy foil into HF, HNO with a volume ratio of 1:1:6 3 Chemical polishing in a mixed solution with distilled water to remove surface oxides;

[0027](4) The Ti-Fe alloy foil after deoxidation and cleaning and drying is used as the anode, the Pt sheet is used as the cathode, and the distance between the two poles is 4cm, pu...

Embodiment 2

[0030] Embodiment 2: Prepare TiO according to the following specific steps 2 nanotube:

[0031] (1) Under the protection of argon, the pure iron powder and pure titanium powder are uniformly ball-milled on a planetary ball mill at a mass ratio of 1:11.5 to obtain a mixed powder. The mixed powder is smelted in a vacuum melting furnace, and the CNC wire cutting is adopted. Processed into ferro-titanium alloy foil with a thickness of 1mm;

[0032] (2) Titanium-iron alloy foils were ultrasonicated in acetone, absolute ethanol, and distilled water for 10 minutes respectively to remove surface oil and other impurities;

[0033] (3) Put the decontaminated titanium-iron alloy foil into HF, HNO with a volume ratio of 1:1:6 3 Chemical polishing in a mixed solution with distilled water to remove surface oxides;

[0034] (4) The Ti-Fe alloy foil after deoxidation and cleaning and drying is used as the anode, the Pt sheet is used as the cathode, and the distance between the two poles is...

Embodiment 3

[0037] Embodiment 3: Prepare TiO according to the following specific steps 2 nanotube:

[0038] (1) Under the protection of argon, the pure iron powder and pure titanium powder are uniformly ball-milled on a planetary ball mill at a mass ratio of 1:19 to obtain a mixed powder. The mixed powder is smelted in a vacuum melting furnace, and the CNC wire cutting is used. Processed into ferro-titanium alloy foil with a thickness of 1mm;

[0039] (2) Titanium-iron alloy foils were ultrasonicated in acetone, absolute ethanol, and distilled water for 10 minutes respectively to remove surface oil and other impurities;

[0040] (3) Put the decontaminated titanium-iron alloy foil into HF, HNO with a volume ratio of 1:1:6 3 Chemical polishing in a mixed solution with distilled water to remove surface oxides;

[0041] (4) The Ti-Fe alloy foil after deoxidation and cleaning and drying is used as the anode, the Pt sheet is used as the cathode, and the distance between the two poles is 4cm,...

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Abstract

The invention discloses a preparation method of a magnetic-doped titanium dioxide nanotube, comprising the following steps: firstly, in glycol electrolyte of ammonium fluoride, taking a ferro-titanium alloy foil as a positive pole and a Pt sheet as a negative pole, and then obtaining a highly-ordered Fe ion-doped TiO2 nanotube by an anodic oxidation method; secondly, placing the Fe ion-doped TiO2 nanotube into a reaction kettle containing NaOH concentrated solution for heating treatment so that Fe2O3 in the nanotube is transformed into Fe3O4 with strong magnetic property to obtain the magnetic-doped TiO2 nanotube; and finally, roasting the magnetic-doped TiO2 nanotube and cooling in a medium to obtain the anatase magnetic-doped TiO2 nanotube. By adopting the preparation method, the highly-ordered doped Fe2O3 in the nanotube is transformed into the Fe3O4 with strong magnetic property, thus improving the electronic transmission capability on the surface of the nanotube, and effectively promoting application of TiO2 to the fields of a solar cell, photocatalysis and the like.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide nanotubes, in particular to a method for preparing magnetically doped titanium dioxide nanotubes, especially a method for controlling the valence state of Fe ions during the preparation process to realize magnetic nanotubes. Background technique [0002] Titanium dioxide (TiO 2 ) semiconductors have excellent characteristics such as non-toxic, low cost, stable chemical properties (acid and alkali resistance, redox resistance, light corrosion resistance) and high refractive index. Pollutants in the atmosphere and water have broad application prospects. In recent years, many research groups in the world have invested a lot of time and energy in synthesizing TiO with different morphologies. 2 Micro and nano objects to meet the requirements of specific application fields. Examples: nanotubes, nanorods, nanowires, and spheres. Among them, nanotubes have a large specific surface area, so th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00H01L31/18
CPCY02P70/50
Inventor 林岳宾周广宏王华玲李年莲
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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