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A kind of CO nanolayer/Co nanowire/porous aluminum oxide composite film and preparation method thereof

A porous alumina and composite thin film technology, applied in nanotechnology, coating, surface reaction electrolytic coating, etc., can solve the problems of low structural color saturation and single physical properties of the film, and achieve the effect of simple preparation method and low cost

Active Publication Date: 2020-04-07
HEBEI NORMAL UNIV FOR NATTIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2013, Hebei Normal University for Nationalities used a one-time oxidation process to prepare aluminum oxide films with gradually changing pore depths and iridescent annular structural colors, but the structural color saturation is low, and the physical properties of the films are single
[0006] Although the composite films of Co nanowires and porous alumina have been studied, the thickness of Co nanolayers, the length of Co nanowires and the distribution density of Co nanowires in the existing composite films all decrease from one end of the film to the other. / Co nanowires / porous alumina composite film has not been reported

Method used

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  • A kind of CO nanolayer/Co nanowire/porous aluminum oxide composite film and preparation method thereof
  • A kind of CO nanolayer/Co nanowire/porous aluminum oxide composite film and preparation method thereof
  • A kind of CO nanolayer/Co nanowire/porous aluminum oxide composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Co nanolayers / Co nanowires / porous alumina composite films were prepared according to the following steps:

[0062] (1) Cut the high-purity aluminum foil with a purity of 99.999% and a thickness of 0.3mm into discs of about 1.8cm, flatten it and put it in an acetone solution for ultrasonic cleaning for 30 minutes, then put it in alcohol for ultrasonic cleaning for 30 minutes, and finally Rinse repeatedly in deionized water, dry and place in a quartz tube furnace, vacuum anneal at 400°C for 2h, and cool to room temperature. Then, electropolish the annealed high-purity aluminum foil. The electropolishing solution is a mixture of HClO4 and absolute ethanol with a volume ratio of 1:4. The aluminum foil is used as the anode and the carbon rod is used as the cathode. Electrooxidation is carried out at a voltage of about 20V for 5 minutes. ;

[0063] (2) Place the polished high-purity aluminum foil in an electrolytic cell as an anode, and a carbon rod with a length of 8 cm and...

Embodiment 2

[0066] Except that in step (3), the angle between the line segment passing through the center of the porous aluminum oxide film and vertically intersecting the carbon rod and the vertical line in the aluminum oxide film is 60°, other conditions are the same as in Embodiment 1.

Embodiment 3

[0068] Except that in step (3), the angle between the line segment passing through the center of the porous aluminum oxide film and vertically intersecting the carbon rod and the vertical line in the aluminum oxide film is 30°, other conditions are the same as in Embodiment 1.

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Abstract

The invention discloses a Co nanolayer, Co nanowire and porous alumina composite film and a preparation method thereof. The Co nanolayer, Co nanowire and porous alumina composite film comprises a Co nanolayer, Co nanowires and a porous alumina film, wherein the Co nanolayer is positioned on the surface of the porous alumina film, the Co nanowires are positioned in pores of the porous alumina film, and the thickness of the Co nanolayer, the length of the Co nanowires and the distribution density of the Co nanowires are decreased progressively from one end of the film to the other end of the film. The Co nanolayer, Co nanowire and porous alumina composite film has a high-saturability iridescent gradual change structure color and a gradual magnetic property; the preparation method is simple, and the cost is low; and in addition, the Co nanolayer, Co nanowire and porous alumina composite film has wide application prospects in the fields of anti-counterfeiting, drawing, decorating, cosmetics, developing technologies, dye sensitization, solar cells and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochemical corrosion and electrochemical deposition, and in particular relates to a Co nanolayer / Co nanowire / porous alumina composite film and a preparation method thereof. Background technique [0002] Porous Anodic Alumina (PAA) is a self-organized highly ordered nanopore array structure obtained by placing high-purity aluminum in an acidic electrolyte and anodizing at a low temperature. It consists of a barrier layer and a porous layer. Close to the surface of metal aluminum is a thin and dense barrier layer. The membrane cells of the porous layer are arranged in a hexagonal close-packed arrangement, and each membrane cell has a nanoscale micropore in the center. The size of the holes is relatively uniform, perpendicular to the surface of the aluminum substrate, and arranged parallel to each other. The preparation process of the porous anodic aluminum oxide film is simple, and the shape and size ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/14C25D11/20B82Y40/00
CPCB82Y40/00C25D11/14C25D11/20
Inventor 岂云开杨淑敏顾建军
Owner HEBEI NORMAL UNIV FOR NATTIES