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Preparation of zinc oxide nano-wire array

A technology of zinc oxide nanowires and arrays, applied in the field of preparation of zinc oxide nanowire arrays, can solve problems such as zinc anodic oxidation research, and achieve the effects of easy large-scale synthesis, simple equipment and steps, and simple equipment

Inactive Publication Date: 2009-08-05
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies on the anodic oxidation of zinc

Method used

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  • Preparation of zinc oxide nano-wire array
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  • Preparation of zinc oxide nano-wire array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The present embodiment directly carries out anodic oxidation with zinc sheet as anode, comprises the following steps:

[0036] 1) Electrolyte preparation: prepare 500 milliliters of sodium bicarbonate aqueous solution with a concentration of 15 mmol / L, add 50 milliliters of alcohol, then fully stir to make it dissolve and mix evenly, so that the obtained solution is used as the electrolyte;

[0037] 2) Zinc sheet pretreatment: ultrasonically clean the zinc sheet with absolute alcohol and acetone in sequence, dry it, and use it as an anode for anodic oxidation after electrochemical polishing;

[0038]3) Anodizing of zinc flakes: Install the pretreated zinc flakes on the sample holder so that one side is exposed to the solution, and the other side is connected to the positive electrode. The counter electrode (cathode) uses a 7cm×5cm graphite plate; then DH1720 - Type 2 DC constant voltage source anodized for 4 hours at a working voltage of 10V;

[0039] 4) Annealing trea...

Embodiment 2

[0044] This example adopts the same preparation method as that of Example 1, except that the anode is not subjected to electrochemical polishing treatment before anodic oxidation.

[0045] Depend on Figure 5 It can be seen that the product of Example 1 is relatively dense, while the product of Example 2 is relatively sparse. It can be seen that the electrochemical polishing treatment before anodizing has a significant impact on the compactness of the final product.

Embodiment 3

[0047] This embodiment adopts the same preparation method as in Example 1, the difference is that the anode adopts ITO (or FTO) glass with magnetron sputtering galvanized (or electrochemically deposited zinc), and the required zinc oxide nanowire array can also be obtained .

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Abstract

The invention discloses a method of preparing a zinc oxide nanometer wire array, which belongs to the field of nanometer material preparation. The method comprises the following steps: using metallic zinc as an anode and an inert electrode as a cathode in an alkalescent electrolyte for anode oxidation; carrying out high-temperature annealing treatment of a zinc salt nanometer wire array obtained on the oxidated anode to prepare the zinc oxide nanometer wire array; and preferably, cleaning and / or carrying out electrochemical polishing treatment to the metallic zinc anode before the anode oxidation or adding a surface active agent to the electrolyte. The zinc oxide nanometer wire array prepared in the invention has the advantages of low-price material, environmental protection, simple equipment and steps, short preparation period and easy mass synthesis, and nanometer wire prepared by the method is formed by assembling zinc oxide nanometer crystals and has higher slenderness ratio, specific surface area and favorable electric performance.

Description

technical field [0001] The invention relates to a method for preparing a zinc oxide nanowire array, in particular to a method for preparing a zinc oxide nanowire array through zinc anodic oxidation, and belongs to the field of nanomaterial preparation. Background technique [0002] ZnO is an important broadband semiconductor material (3.37eV) with high exciton binding energy (60meV). Nano-zinc oxide has many special properties, and has a wide range of applications in optical equipment, heterogeneous catalysis, photocatalysis, and solar cell preparation. [0003] The preparation method of zinc oxide can be simply divided into gas phase method and liquid phase method. The gas phase method usually uses zinc powder or zinc oxide powder as the raw material, which is transported through the gas phase at a higher temperature, and then deposited in a suitable temperature zone to finally obtain zinc oxide with different shapes. This method requires high temperatures, and the result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B30/02C30B29/16C30B29/62C25D11/34
Inventor 胡柱东陈清彭练矛
Owner PEKING UNIV
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