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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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of the above method is complicated,

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

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Example Embodiment

[0019] Example 1

[0020] 1) The base material is a pure titanium plate with a thickness of 2mm, the surface is polished with metallographic sandpaper until scratch-free, and cleaned by ultrasonic cleaning with acetone, ethanol and three times of water, and then dried for use. The electrolyte of 0.5wt% HF was prepared, and platinum was used as the counter electrode at room temperature, and electrochemical anodization was carried out at a voltage of 20V for 30min, that is, ordered TiO was obtained on the surface of the titanium plate. 2 In the nanotube array film layer, the inner diameter of the nanotube is 80-90 nm, and the thickness of the film layer is about 500 nm.

[0021] 2) Using the method of combining ultrasonic and dipping to prepare Fe 2 O 3 Nanoparticle-modified TiO 2 Nanotube arrays. The sample prepared in step (1) was first placed in 0.1mol / L Fe(NO 3 ) 3 The solution was sonicated for 40 min, taken out, rinsed with distilled water, and left to dry. The samp...

Example Embodiment

[0023] Example 2

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

[0025] 2) The method of combining ultrasonic and dipping is used to prepare Fe 2 O 3 Nanoparticle-modified TiO 2 Nanotube arrays. The sample prepared in step (1) was first placed in 0.5mol / L Fe(NO 3 ) 3 The solution was sonicated for 8 min, taken out, rinsed with distilled water, and left to dry. The sample was calcined at 450 °C for 2 h, and then cooled naturally to obtain Fe. 2 O 3 Nanoparticle-modified TiO 2 Nanotube arrays. from figure 2 It can be seen that Fe 2 O 3 Nanoparticles Nanoparticle Quantity Comparison figure 1 Significantly increased, some nanoparticles have been deposited within the nanotubes. EDS quantitative analysis results 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 catalyzed degradation of methylene blu...

Example Embodiment

[0027] Example 3

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

[0029] 2) The method of combining ultrasonic and dipping is used to prepare Fe 2 O 3 Nanoparticle-modified TiO 2 Nanotube arrays. The sample prepared in step (1) was first placed in 0.5mol / L Fe(NO 3 ) 3 The solution was sonicated for 15 min, taken out, rinsed with distilled water, and left to dry. The sample was calcined at 500°C for 2h, and then cooled naturally to obtain Fe. 2 O 3 Nanoparticle-modified TiO 2 Nanotube arrays. from image 3 It can be seen that Fe 2 O 3 The amount of nanoparticles figure 2 Significantly increased, a large number of nanoparticles have been deposited within 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 catalyzed degradation of methylene blue by th...

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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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