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Method for preparing iron oxide nano granule modified titanium dioxide nano tube array

A nanotube array, iron oxide nanotechnology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of unfavorable industrialized production, complex preparation process, etc. Achieve the effect of improving utilization, simple operation and improving absorption capacity

Inactive Publication Date: 2011-04-06
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the above method is complicated, which is not conducive to the realization of industrial production.

Method used

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  • Method for preparing iron oxide nano granule modified titanium dioxide nano tube array
  • Method for preparing iron oxide nano granule modified titanium dioxide nano tube array
  • Method for preparing iron oxide nano granule modified titanium dioxide nano tube array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) The base material is a pure titanium plate with a thickness of 2mm. The surface is polished with metallographic sandpaper until there are no scratches, cleaned with acetone, ethanol and three times of ultrasonic cleaning in water, and dried in air for use. Prepare an electrolyte solution of 0.5wt% HF, use platinum as the counter electrode at room temperature, and perform electrochemical anodization at 20V for 30min, that is, to obtain ordered TiO on the surface of the titanium plate 2 The nanotube array film layer has an inner diameter of 80-90nm and a film thickness of about 500nm.

[0021] 2) Using a combination of ultrasound and impregnation to prepare Fe 2 o 3 Nanoparticle-modified TiO 2 array of nanotubes. Place the sample prepared in step (1) in 0.1mol / L Fe(NO 3 ) 3 Sonicate the solution for 40 minutes, take it out, rinse it with distilled water, and let it stand to dry. Fe 2 o 3 Nanoparticle-modified TiO2 array of nanotubes. From figure 1 It can be s...

Embodiment 2

[0024] 1) TiO 2 The preparation of the nanotube array film layer is the same as in Example 1.

[0025] 2) Using a combination of ultrasound and impregnation to prepare Fe 2 o 3 Nanoparticle-modified TiO 2 array of nanotubes. Place the sample prepared in step (1) in 0.5mol / L Fe(NO 3 ) 3 Sonicate the solution for 8 minutes, take it out, rinse it with distilled water, and let it dry. The sample was calcined at 450°C for 2 hours, then cooled naturally to obtain Fe 2 o 3 Nanoparticle-modified TiO 2 array of nanotubes. From figure 2 It can be seen that Fe 2 o 3 Nanoparticle Quantity Comparison figure 1 significantly increased, and some nanoparticles had been deposited inside the nanotubes. The results of EDS quantitative analysis showed that the atomic percentage of Fe was 0.77%.

[0026] 3) Fe 2 o 3 Nanoparticle-modified TiO 2 The test of the apparent rate constant k of the visible light catalytic degradation of methylene blue by the nanotube array photocatalyst ...

Embodiment 3

[0028] 1) TiO 2 The preparation of the nanotube array film layer is the same as in Example 1.

[0029] 2) Using a combination of ultrasound and impregnation to prepare Fe 2 o 3 Nanoparticle-modified TiO 2 array of nanotubes. Place the sample obtained in step (1) in 0.5mol / L Fe(NO 3 ) 3 Sonicate the solution for 15 minutes, take it out, rinse it with distilled water, and let it stand to dry. The sample was calcined at 500°C for 2 hours, then cooled naturally to obtain Fe 2 o 3 Nanoparticle-modified TiO 2 array of nanotubes. From image 3 It can be seen that Fe 2 o 3 The amount of nanoparticles compared figure 2 Significantly increased, a large number of nanoparticles have been deposited in the nanotubes. EDS quantitative analysis results showed that the atomic percentage of Fe was 1.18%.

[0030] 3) Fe 2 o 3 Nanoparticle-modified TiO 2 The test of the apparent rate constant k of the visible light catalytic degradation of methylene blue by the nanotube array p...

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Abstract

The invention discloses a method for preparing an iron oxide nano granule modified titanium dioxide nano tube array, and relates to a method for preparing a titanium dioxide nano tube array. The method comprises the following steps of: pre-treating a substrate, preparing electrolyte, performing electrochemical anodic oxidation on the substrate to form an ordered titanium dioxide nano tube array film with controllable size on the surface of the substrate, treating the film in Fe(NO3)3.9H2O by ultrasonic, and taking out and drying the film after standing; and thermally treating the dried composite film layer to obtain a product. By adopting the ultrasonic and chemical deposition combined method and controlling the concentration of the Fe(NO3)3 solution, the ultrasonic time and the dipping time, iron oxide nano granules can be controllably deposited on the surface of the titanium-based titanium dioxide nano tube array and in tubes, so that the photo-catalysis efficiency of the TiO2 can be improved, the photo-response of the TiO2 can be expanded to a visible light area, the utilization rate of the sunlight is improved, and the TiO2 applied to photo-catalysis can improve the absorptioncapability of an electrode on visible light and the photo-catalytic degradation capability on organic pollutants.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide nanotube array, in particular to a preparation method of a titanium dioxide nanotube array modified by iron oxide nanoparticles. Background technique [0002] Environmental pollution and energy shortage are the major problems faced by human beings in the 21st century and need to be solved urgently. They have become important constraints for my country to implement comprehensive, coordinated and sustainable development. In 1976, Carey et al first proposed the application of titanium dioxide (TiO 2 ) Photocatalytic degradation of biphenyls and chlorinated biphenyls, opening up TiO 2 A new field of application in environmental protection. In 2001, American scientists Grimes et al prepared TiO on the surface of Ti by electrochemical anodic oxidation method. 2 Nanotube array materials have attracted great attention. In recent years, various methods have been developed to synthesize TiO ...

Claims

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Application Information

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IPC IPC(8): C25D11/26B01J23/745B01J37/00A62D3/10A62D101/28
Inventor 孙岚欧阳君杰吴奇谢鲲鹏林昌健
Owner XIAMEN UNIV
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