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Preparation method of tungsten-doped titanium dioxide nanotube array

A nanotube array, titanium dioxide technology, applied in nanotechnology, electrolytic coatings, surface reaction electrolytic coatings, etc., can solve the problems of controllable W element distribution and doping amount, and achieve good binding force, simplified process flow, convenient effect of regulation

Active Publication Date: 2018-03-27
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of tungsten-doped titania nanotube array, which can effectively solve the problem of controllable distribution and doping amount of W element in nanotubes

Method used

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  • Preparation method of tungsten-doped titanium dioxide nanotube array
  • Preparation method of tungsten-doped titanium dioxide nanotube array
  • Preparation method of tungsten-doped titanium dioxide nanotube array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1, titanium sheet pretreatment;

[0028] Step 2: Weighing 0.8 wt% ammonium fluoride (about 0.92 g) was dissolved in 35 mL of water, stirred for 10 minutes, and fully dissolved to obtain an ammonium fluoride aqueous solution.

[0029] Step 3. Add 0.04wt% (about 0.05g) sodium tungstate dihydrate to the ammonium fluoride aqueous solution in step 2, stir magnetically for 10 minutes, then add 65mL glycerol, and stir magnetically at 50°C After 30 minutes, the solution was mixed uniformly to obtain an electrolyte solution.

[0030] Step 4. Connect the titanium sheet pretreated in step 1 to the positive electrode of the constant voltage DC power supply, and the graphite sheet or platinum sheet to the negative electrode of the power supply, and simultaneously immerse it in the electrolyte solution of step 3, constant voltage 30V, electrode spacing 3cm, electrolyte constant temperature 25°C. The anodizing time was set at 3 hours, and the whole process was accompanied by ma...

Embodiment 2

[0034] The preparation process is substantially the same as in Example 1, except that:

[0035] (1) In the ammonium fluoride aqueous solution in step 2, add sodium tungstate dihydrate with a mass percentage of 0.08wt% (about 0.10g), stir magnetically for 10 minutes, then add 65mL glycerol, and stir magnetically at 50°C After 30 minutes, the solution was mixed uniformly to obtain an electrolyte solution.

[0036] (2) Connect the titanium sheet pretreated in step 1 to the positive electrode of the constant voltage DC power supply, and the graphite sheet or platinum sheet to the negative electrode of the power supply and simultaneously immerse it in the electrolyte solution with a constant voltage of 35V, an electrode spacing of 3cm, and a constant temperature of the electrolyte at 25°C. The anodizing time was set at 3 hours, and the whole process was accompanied by magnetic stirring. After the anodizing process is completed, the sample is taken out, ultrasonically cleaned with ...

Embodiment 3

[0040] The preparation process is substantially the same as in Example 1, except that:

[0041] (1) In the ammonium fluoride aqueous solution in step 2, add sodium tungstate dihydrate with a mass percentage of 0.16wt% (about 0.20g), stir magnetically for 10 minutes, then add 65mL glycerol, and stir magnetically at 50°C After 40 minutes, the solution was mixed uniformly to obtain an electrolyte solution.

[0042] (2) Connect the titanium sheet pretreated in step 1 to the positive electrode of the constant voltage DC power supply, and the graphite sheet or platinum sheet to the negative electrode of the power supply and simultaneously immerse it in the electrolyte solution with a constant voltage of 35V, an electrode spacing of 3cm, and a constant temperature of the electrolyte at 25°C. The anodizing time was set at 4 hours, and the whole process was accompanied by magnetic stirring. After the anodizing process is completed, the sample is taken out, ultrasonically cleaned with ...

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Abstract

The invention provides a preparation method of a tungsten-doped titanium dioxide nanotube array and belongs to the technical field of environmental photo-catalysis of a nanometer material. The preparation method comprises the following steps: (1) pre-treating a titanium plate; (2) adding ammonium fluoride of which the mass percent is 0.8wt% into 35vol% of deionized water, and fully dissolving to obtain an ammonium fluoride solution for later use; (3) adding sodium dihydrate tungstate of which the mass percent is 0.04wt% to 1wt% into the prepared ammonium fluoride solution, then adding glycerine of which the volume percent is 65vol%, maintaining the temperature at 50 DEG C and stirring for 30 to 60 minutes to obtain an electrolyte; (4) connecting the titanium plate which is pretreated in the step (1) with an anode of a power supply, connecting graphite plate or a platinum plate with a cathode of the power supply, arranging in the electrolyte obtained in the step (3), performing anodic oxidation for 3-5 hours under a constant pressure of 30 V to 40 V to obtain a nanotube composite material, washing by using ethanol and deionized water in sequence and drying for later use; and (5) putting the obtained nanotube composite material in a muffle furnace, heating to 450 DEG C by a speed of 5 DEG C / min, maintaining the temperature to be constant for 2 hours and cooling to room temperature to obtain the tungsten-doped titanium dioxide nanotube array.

Description

technical field [0001] The invention belongs to the technical field of nanometer material environment photocatalysis. Background technique [0002] Since 1972, TiO 2 It is the first report to use photocatalytic technology to split water to produce H 2 and O 2 After TiO 2 The research on photocatalytic technology of semiconductor has kicked off. TiO 2 As a semiconductor material with excellent physical and chemical properties, it has broad application prospects in solar cells, various sensors, human implant materials, and photocatalytic degradation of pollutants. TiO 2 Nanotube arrays are TiO 2 It has a special morphology, has the advantages of large specific surface area and good immobilization performance, and is especially suitable for use as a solar cell photoanode and photocatalytic degradation of pollutants. Then the inherent energy level gap of the confined material itself (anatase 3.2eV, rutile 3.0eV), TiO 2 It can only be excited by ultraviolet light with a ...

Claims

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Application Information

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IPC IPC(8): C25D11/26B82Y40/00
CPCB82Y40/00C25D11/26
Inventor 周杰冯波李思杰翁杰鲁雄段可
Owner SOUTHWEST JIAOTONG UNIV
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