Porous aluminium oxide template preparing method and its apparatus

A porous alumina and template technology, applied in anodizing and other directions, can solve the problems of inconvenient height adjustment of aluminum sheets and platinum sheets, slippage of the electrolytic cell cover, expensive materials, etc., achieving good results, simple replacement of parts, and material easy-to-get effect

Inactive Publication Date: 2005-10-05
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared porous alumina template is limited to the size of the gasket, and the groove is sealed with polytetrafluoroethylene, which is not only more expensive than glass, plexiglass, and plastic, but also inconvenient to operate
Xu Yunfeng (Xu Yunfeng, Xiamen University master's degree thesis [D], 2002), the device used is inconvenient to adjust the height of the aluminum sheet and platinum sheet immersed in the electrolyte; the electrolyzer cover is made of polytetrafluoroethylene, which is not only relatively cheap Plastic or plexiglass are more expensive and cumbersome to make; and the cell lid may slip under a magnetic stirrer

Method used

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  • Porous aluminium oxide template preparing method and its apparatus
  • Porous aluminium oxide template preparing method and its apparatus
  • Porous aluminium oxide template preparing method and its apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Wipe the aluminum foil clean with filter paper, and cut it into small pieces about the same size as the platinum piece. The platinum sheet is 3cm×4.5cm in size. Put 115ml H 3 PO 4 , 80ml glycerol and 0.5ml H 2 SO 4 Polish in the solvent of the mixture for 3 to 5 minutes. Polishing uses almost the same setup for anodizing, just swapping the jacketed electrolytic cell for a 250ml beaker. Then the whole device is heated in a water bath above 70°C, and rinsed with deionized water after polishing.

[0027] 2) Put the polished aluminum foil into the electrolytic cell and pour in the electrolytic solution. The electrolytic solution is oxalic acid with a concentration of 0.2M, and the electrolytic cell is kept at a constant temperature at room temperature by running tap water. Connect the circuit and turn on the power to keep the circuit constant at 45V. At the same time, turn on the magnetic stirrer and oxidize for 65 minutes.

[0028] 3) Soak the oxidized aluminum ...

Embodiment 3

[0031] 1) Wipe the aluminum foil clean with filter paper, and cut it into small pieces about the same size as the platinum piece. The platinum sheet is 3cm×4.5cm in size. Put 144ml H 3 PO 4 , 120ml glycerol and 0.6ml H 2 SO 4 The mixture was polished in solvent for 4 minutes. Polishing uses almost the same setup for anodizing, just swapping the jacketed electrolytic cell for a 250ml beaker. Then the whole device is heated in a water bath above 80°C, and rinsed with deionized water after polishing.

[0032] 2) Put the polished aluminum foil into the electrolytic cell and pour in the electrolytic solution. The electrolytic solution is phosphoric acid with a concentration of 0.25M, and the electrolytic cell is kept at a constant temperature at room temperature by running tap water. Connect the circuit, turn on the power supply, and keep the circuit constant at 50V. At the same time, turn on the magnetic stirrer and oxidize for 30 minutes.

[0033] 3) Soak the oxidized alu...

Embodiment 4

[0035] 1) Wipe the aluminum foil clean with filter paper, and cut it into small pieces about the same size as the platinum piece. The platinum sheet is 3cm×4.5cm in size. Put 160ml H 3 PO 4 , 80ml glycerol and 0.56ml H 2 SO 4 The mixture was polished in a solvent for 3 minutes. Polishing uses almost the same setup for anodizing, just swapping the jacketed electrolytic cell for a 250ml beaker. Then the whole device is heated in a water bath above 85°C, and rinsed with deionized water after polishing.

[0036] 2) Put the polished aluminum foil into the electrolytic cell and pour in the electrolytic solution. The electrolytic solution is phosphoric acid with a concentration of 0.1M, and the electrolytic cell is kept at a constant temperature at room temperature by running tap water. Connect the circuit well, turn on the power supply, and keep the circuit constant at 48V. At the same time, turn on the magnetic stirrer and oxidize for 90 minutes.

[0037] 3) Soak the oxidiz...

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Abstract

It is the producing method of multi-hole Al2O3 form board and the related device. It is about a kind of hard form board. The invention has simplified prior period's treatment, easy operation during the experiment, easily-got device and solvent, short time of producing and small amount of drug. The device has electrolyzing cell, capping, the positive pole and its leading-out wire, the negative pole and its leading-out wire and the magnetic stirring apparatus. The cell wall's structure is hollow with double layer, and on the wall set the water-entry hole and water-exiting hole, which are linked with the hollow internal cavity. The capping is set atop the electrolyzing cell, and meanwhile the positive pole and the negative one are set in the electrolyte. The positive pole is Al flake, and the negative one is Pt flake. Firstly, the Al foil should be burnished, the burnishing casket heated by water. After burnished, the Al foil is put into the electrolyzing cell, which is set in the temperature below the room-temperature. After oxidized, the Al foil is immersed in the saturated HgCl2 solution. Then wash off the Al2O3 thin coat which has leaved the Al base. At last, immerse it in the H3PO4 until the interlock is formed.

Description

technical field [0001] The invention relates to a hard template, in particular to a porous alumina template which can be mainly used to prepare regularly arranged nanometer materials. Background technique [0002] The porous alumina template is the most commonly used hard template, and it is a hard template that is anodized on the surface of high-purity aluminum foil to form a porous membrane. Its structural feature is that it has hexagonal cylindrical parallel holes of uniform size at the nanoscale, and nanomaterials with very regular arrangements can be made using this as a template. Alumina is an inorganic material. Compared with other templates, it has many advantages, such as low preparation cost, simple preparation process conditions, stable existence in high temperature and organic solvents, and easy adjustment of pore size and depth parameters. The preparation of traditional anodized aluminum templates requires pre-oxidation pretreatments such as high-temperature an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04
Inventor 林志为林水潮连伟黄荣彬郑兰荪
Owner XIAMEN UNIV
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