Method for producing micro-surface three-dimensional interconnected-nanopore anodic aluminum oxide template

An anodized aluminum, three-dimensional interconnection technology, applied in nanotechnology, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems that the anodized aluminum template cannot be used as a template, the mechanical strength is difficult to guarantee, and the raw materials are difficult to obtain. Suitable for large-scale production, easy access to raw materials, and simple equipment

Active Publication Date: 2015-09-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The three-dimensional interconnected porous templates currently used are mainly derived from natural materials or photolithographic preparation processes. There are disadvantages such as difficult access to raw materials, narrow application range, and high cost. These problems have not been well resolved.
However, there are still problems in the three-dimensional interconnected porous anodized alumina templates prepared at present, such as prone to over-corrosion, difficult to guarantee mechanical strength, etc.
Over-corrosion is prone to lodging, and the low mechanical strength makes the anodized aluminum template unable to be used as a template

Method used

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  • Method for producing micro-surface three-dimensional interconnected-nanopore anodic aluminum oxide template
  • Method for producing micro-surface three-dimensional interconnected-nanopore anodic aluminum oxide template
  • Method for producing micro-surface three-dimensional interconnected-nanopore anodic aluminum oxide template

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Embodiment 1

[0032] A method for preparing a three-dimensional interconnected nanoporous anodized aluminum template with a micro-curved surface, comprising the following steps:

[0033] (1) Cleaning high-purity aluminum flakes with a mass fraction ≥ 99.99% in absolute ethanol and deionized water to obtain clean aluminum flakes;

[0034] (2) With the clean aluminum flake that step (1) obtains as anode, graphite is cathode, carry out constant voltage electrochemical polishing in the mixed solution that the volume ratio of perchloric acid and dehydrated alcohol is 0.2 under-5 ℃, voltage is 23V, the polishing time is 5min, and the polished aluminum sheet is obtained;

[0035] (3) the aluminum flake of polishing that obtains with step (2) is anode, and graphite is cathode, and the volume ratio of solution A (0.4mol / L oxalic acid aqueous solution) and solution B (dehydrated alcohol) is the mixing of A:B=2.1 solution to carry out the first anodic oxidation process, the temperature is -5 ℃, becau...

Embodiment 2

[0040] A method for preparing a three-dimensional interconnected nanoporous anodized aluminum template with a micro-curved surface, comprising the following steps:

[0041] (1) Cleaning high-purity aluminum flakes with a mass fraction ≥ 99.99% in absolute ethanol and deionized water to obtain clean aluminum flakes;

[0042] (2) With the clean aluminum sheet that step (1) obtains as anode, graphite is cathode, carry out constant voltage electrochemical polishing in the mixed solution that the volume ratio of perchloric acid and dehydrated alcohol is 0.3 under 0 ℃, voltage is 15V , the polishing time is 7min, and a polished aluminum sheet is obtained;

[0043] (3) the polished aluminum sheet that obtains with step (2) is anode, and graphite is cathode, and the volume ratio of solution C (0.3mol / L oxalic acid aqueous solution) and solution B (dehydrated alcohol) is the mixing of C:B=0.5 solution to carry out the first step of anodic oxidation process, the temperature is 5 ℃: fir...

Embodiment 3

[0048] A method for preparing a three-dimensional interconnected nanoporous anodized aluminum template with a micro-curved surface, comprising the following steps:

[0049] (1) Cleaning high-purity aluminum flakes with a mass fraction ≥ 99.99% in absolute ethanol and deionized water to obtain clean aluminum flakes;

[0050] (2) With the clean aluminum sheet that step (1) obtains as anode, graphite is cathode, carry out constant voltage electrochemical polishing in the mixed solution that the volume ratio of perchloric acid and dehydrated alcohol is 0.4 at 5 ℃, voltage is 20V , the polishing time is 8min, and a polished aluminum sheet is obtained;

[0051] (3) the aluminum flake of polishing that obtains with step (2) is anode, and graphite is cathode, and the volume ratio of solution D (0.4mol / L oxalic acid aqueous solution) and solution B (dehydrated alcohol) is the mixing of D:B=3 solution to carry out the first step of anodizing process, the temperature is 0°C: first use c...

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Abstract

The invention discloses a method for producing a micro-surface three-dimensional interconnected-nanopore anodic aluminum oxide template. The method includes: placing a high-purity aluminum sheet in absolute ethyl alcohol and ionized water sequentially for washing, and then performing electrochemical polishing; performing a first-step anodic oxidation process by taking the polished aluminum sheet as an anode and graphite as a cathode to obtain a porous anodic aluminum membrane with an aluminum base, and enabling the porous anodic aluminum membrane to be adjustable from sub-micron grade to micron grade in structural unit size by adjusting anodic oxidation conditions such as voltage and current density; placing the porous anodic aluminum membrane with the aluminum base in chromium trioxide and phosphate mixed aqueous solution for membrane removing to obtain the aluminum base with the surface provided with sub-micron grade and micro grade pits; subjecting the aluminum base obtained from the previous step to secondary anodic oxidation under low voltage, and finally performing chambering and corrosion in a phosphoric acid solution to obtain the micro-surface three-dimensional interconnected-nanopore anodic aluminum oxide template by controlling time for chambering.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional interconnected nanoporous anodized aluminum template with a micro-curved surface, in particular to a method for preparing a three-dimensional interconnected nano-porous anodized aluminum template with a micro-curved surface by using a two-step anodic oxidation process of aluminum and a pore expansion corrosion process method. Background technique [0002] Nanomaterials such as nanodots, nanowires, and nanotubes have been widely used due to their unique physical and chemical properties. For example, the electronic energy state of nano-semiconductor materials will change. Compared with bulk materials, their optical, electrical, and acoustic properties are significantly different. They can be used in photocatalysts, solar cells, low-dimensional semiconductor devices, nano-integrated circuits, nano Integrated circuits and other aspects have been applied. At present, among the nanomateria...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/12C25D11/24B82Y40/00
Inventor 李屹金世遇覃玉燕凌志远
Owner SOUTH CHINA UNIV OF TECH
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