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A kind of method for preparing anodized titanium nano flower electrode

A technology of anodizing titanium and anodizing, which is applied in the field of electrochemistry and can solve the problems of water pollution, high cost, and unfavorable environmental protection.

Active Publication Date: 2021-04-27
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of heavy metal ions will cause water pollution, which is not conducive to environmental protection; tetrabutyl titanate is easy to hydrolyze, and the preparation process has strict requirements on the environment; organic solvents such as octanol are also not conducive to environmental protection; these methods require high temperatures higher than 100 ° C Heating for a long time under the environment, the cost is high; the prepared TiO 2 Nanoflowers are mostly in the form of powder or particles, and cannot be directly used as electrodes for supercapacitors or other devices

Method used

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  • A kind of method for preparing anodized titanium nano flower electrode
  • A kind of method for preparing anodized titanium nano flower electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Firstly, a titanium foil with a purity of 99.5%, 6cm×1cm, and a thickness of 100μm is immersed in the polishing solution HF:HNO 3 :H 2 The oxide film on the surface of the titanium foil was removed by treatment in a mixed solution with a volume ratio of O of 1:1:2 for 15 s. Then rinse with deionized water, and finally dry naturally for later use. With the titanium foil as the anode and the graphite sheet as the cathode, the 4 F and 2vol%H 2 Anodic oxidation was carried out in ethylene glycol electrolyte of O. At a current density of 10mA cm -2 Constant current anodizing, or 60V constant voltage anodizing for 5min. The electrolyte temperature is always maintained at around 20°C. After anodizing, rinse with deionized water and dry naturally for later use.

[0014] The anodized titanium foil was placed in 10wt% phosphoric acid aqueous solution, and soaked at room temperature for 4 days. After the end, take out the titanium foil, wash it with deionized water, and dr...

Embodiment 2

[0016] The specifications, dimensions, pretreatment and anodizing process of the titanium foil are the same as in Example 1, but the concentration of phosphoric acid is changed to 8 wt%, and soaking treatment at room temperature for 15 days. The prepared anodized titanium nanoflowers are composed of petals with a width of about 1 μm.

Embodiment 3

[0018] The size, pretreatment and anodic oxidation process of the titanium foil are the same as in Example 1, but the concentration of phosphoric acid is changed to 12 wt%, and soaking treatment at room temperature for 2 days. The prepared anodized titanium nanoflowers are composed of petals with a width of about 650 nm.

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Abstract

The invention discloses a method for preparing an anodized titanium nano flower electrode. In the method, firstly, an anodized titanium nanotube array film is prepared on the surface of a titanium substrate by an anodic oxidation method, and then immersed in a phosphoric acid aqueous solution for a long time at room temperature to obtain an anodized titanium nanoflower electrode. The anodized titanium nano-flowers prepared by the present invention are composed of nano-petals with an average thickness of about 10-20 nm and a width of about 250 nm-1 μm. The use and high-temperature treatment process are simpler and easier than existing methods, energy-saving, environment-friendly, low in cost and strong in controllability.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and relates to a method for preparing an anodized titanium nano flower electrode. Background technique [0002] As a semiconductor material, titanium dioxide is widely used in solar cells, supercapacitors, electrocatalysis and water splitting due to its unique physical and chemical properties. In recent years, it has attracted widespread attention as a promising electrode material for supercapacitors, and its morphology, size and microstructure all have an important impact on its supercapacitor performance. The preparation of nanostructured titanium dioxide electrode materials is an effective way to increase its energy density and power density. For this reason, various methods for preparing nanostructured titanium dioxide have been developed, such as nanotubes, nanowires, nanosheets and nanoflowers. Nanostructured titania electrode material. Among them, titanium dioxide with nanoflower...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 宋晔吴丽珍牛冬梅封晓杰朱绪飞
Owner NANJING UNIV OF SCI & TECH