Method and device for preparing ordered porous alumina template

A porous alumina and template technology, applied in the direction of anodic oxidation, etc., can solve the problems of expensive, time-consuming, energy and experimental materials, and restrict the progress of research topics, and achieve the effect of low cost and adjustable pore size

Inactive Publication Date: 2010-01-13
TONGJI UNIV
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  • Abstract
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Problems solved by technology

The ordered porous alumina templates available in the market are expensive, so most researchers have to make their own nano-ordered porous alumina templat

Method used

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  • Method and device for preparing ordered porous alumina template
  • Method and device for preparing ordered porous alumina template
  • Method and device for preparing ordered porous alumina template

Examples

Experimental program
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Embodiment

[0042] (1) Annealing: the aluminum foil is annealed (500°C, 5h) to eliminate the stress generated during the shearing process of the aluminum foil.

[0043] (2) Cleaning oil stains: immerse the annealed aluminum foil in acetone, alcohol and deionized water in sequence, and ultrasonically clean them for 3 minutes respectively.

[0044] (3) Removing the natural oxide layer: immerse the cleaned aluminum foil in an 8% NaOH solution (at a constant temperature of 60° C.) for 1 min and 45 s, and then take it out and clean it with deionized water.

[0045] (4) Electropolishing: Put the aluminum foil on the electrolytic device (the anode is connected to the aluminum foil), and immerse it in the electropolishing solution (95vol%H 3 PO 4 (85%)+5vol%H 2 SO 4 (97%)+20g / L Cr 2 o 3 ) and polished for 4 minutes, and rinsed with deionized water. The electrolytic polishing parameters are: water bath constant temperature 85°C; electrolytic current 0.8A.

[0046] (5) Primary anodizing: Put...

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Abstract

The invention relates to a method and a device for preparing an ordered porous alumina template, thereby being capable of realizing large-scale preparation of the ordered porous alumina templates with low cost. The method comprises the steps of: 1) removing stains and an oxide film on an aluminum sheet and polishing; and 2) using the aluminum sheet as an anode, adopting a base metal as a cathode and adopting the secondary anode oxidation method for preparing the nano-ordered porous alumina template. The cathodes and the anodes are multiple and are respectively connected in parallel by adopting guide wires, thereby controlling the anode oxidation of the aluminum sheets. The device is a cuboid groove structure, a plurality of pairs of small holes are formed on two sides and used for containing the cathodes and the anodes which are connected with a power supply, and electrolyte is contained in the groove. An magnetic stirrer and other stirring equipment can be adopted for carrying out stirring on the electrolyte during the anode oxidation process. The method and the device can realize the low-cost, large-scale and rapid preparation of a nano-pore path array with high order degree and adjustable pore size.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and relates to a method for large-scale preparation of ordered porous alumina templates at low cost and a corresponding electrochemical device. Background technique [0002] Ordered porous alumina is an oxide film with nano-ordered pore structure obtained after electrochemical anodization of high-purity aluminum foil. As early as 1953, American scholar Keller and others prepared porous alumina membranes by electrochemical anodic oxidation, but the poor order of the pores failed to attract the attention of the scientific community. Since 1978, Professor Wood's research group published in Nature magazine the method of anodizing high-purity aluminum to prepare ordered porous alumina, which has attracted widespread attention in the scientific community. In 1995, Masuda et al. published in Science magazine the preparation of highly ordered porous alumina by twice anodizing high-purity aluminum...

Claims

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Application Information

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IPC IPC(8): C25D11/04
Inventor 杨修春邹骁陆伟刘艳侯军伟
Owner TONGJI UNIV
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