Method for depositing nanogold on surface of titanium dioxide nanotube array

A nanotube array and titanium dioxide technology, applied in the direction of surface reaction electrolytic coating, electrolytic coating, coating, etc., to achieve the effect of avoiding waste and improving deposition efficiency

Pending Publication Date: 2022-07-08
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the size and shape of gold nanoparticles have a significant impact on their biological effects, and how to form gold nanoparticles on the surface of nanotubes faces many challenges.

Method used

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  • Method for depositing nanogold on surface of titanium dioxide nanotube array
  • Method for depositing nanogold on surface of titanium dioxide nanotube array
  • Method for depositing nanogold on surface of titanium dioxide nanotube array

Examples

Experimental program
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Embodiment 2

[0057] The only difference between the second embodiment and the embodiment is that the electrodeposition time in step S4 is 5 min, which is the same as that of the second embodiment.

Embodiment 3

[0059] The only difference between the second embodiment and the embodiment is that the electrodeposition time in step S4 is 30 min, which is the same as that.

Embodiment 4

[0061] The only difference between the second embodiment and the embodiment is that the electrodeposition time in step S4 is 60 min, which is the same as that.

[0062] The morphology of gold nanoparticles deposited in Example 1 to Example 4 was compared and observed, and the results were as follows. figure 1 and attached figure 2 shown, from the attached figure 1 and 2 It can be seen that both the size and density of gold nanoparticles increased with the prolongation of deposition time. However, when the deposition time was 5min, the number of gold nanoparticles deposited was small, and the particle size was small, and the cavity of the nanotube was not completely filled; when the deposition time was 30min and 60min, the gold nanoparticles exceeded the mouth of the nanotube, resulting in poor particle size. Due to the limitation, large gold particles are produced, and the biological activity of large gold nanoparticles decreases, which is not conducive to biological exper...

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Abstract

The invention discloses a method for depositing nanogold on the surface of a titanium dioxide nanotube array, which comprises the following steps: S1, pretreating a titanium sheet; S2, anodizing the surface of the titanium sheet to form the titanium dioxide nanotube array; s3, carrying out insulation treatment on the substrate and the side wall of the titanium dioxide nanotube array by using an organic thin film, and only reserving the part in contact with the electrode for conductive contact; s4, the titanium dioxide nanotube array treated in the step S3 serves as a working electrode, a platinum sheet serves as an auxiliary electrode, and constant piezoelectric deposition is conducted in a chloroauric acid solution; and S5, removing the organic thin film insulating layer. According to the deposition method, the titanium sheet is subjected to insulation treatment, and only the part in contact with the electrode is reserved for nanogold deposition, so that the waste of electric energy is avoided, and the deposition efficiency of nanogold is efficiently improved; meanwhile, the pipe diameter of the substrate nanotube is controlled by adopting an anodic oxidation voltage method, and the size of deposited nano gold particles is regulated and controlled, so that different biological effects are generated.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide nanotube arrays, in particular to a method for depositing nano-gold on the surface of titanium dioxide nanotube arrays. Background technique [0002] Titanium dioxide nanotubes array (NT) formed by anodic oxidation of titanium surface is a commonly used titanium surface active structure. Studies have confirmed that nano-gold can be deposited on the surface of NT by cathodic electrodeposition technology to further enhance the biological activity of the surface of the material. However, the size and shape of gold nanoparticles have a significant impact on its biological effects, and how to controllably form gold nanoparticles on the surface of nanotubes faces many challenges. SUMMARY OF THE INVENTION [0003] In view of the above-mentioned problems, the present invention aims to provide a method for depositing nano-gold on the surface of a titanium dioxide nanotube array. The titanium she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D7/00C25D3/48C25D5/54
CPCC25D11/26C25D7/00C25D3/48C25D5/54
Inventor 宋文张玉梅徐博雅何奕德张燕李广文侯亚杰
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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