Preparation method and application of hydrogenated titanium dioxide nanotube array film

A nanotube array and titanium dioxide technology, applied in the manufacture of discharge tubes/lamps, nanotechnology, cold cathode manufacturing, etc., can solve the problems of polluting production equipment, demanding equipment, and high preparation temperature, and achieve high emission current density and open Low electric field and highly reproducible results

Inactive Publication Date: 2013-04-24
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this growth method has the following technical difficulties in practical application: first, the preparation temperature is relatively high, and the requirements for the equipment are strict; second, the cracked acetylene will pollute the production equipment; finally, the opening electric field is still high
These technical difficulties will limit its application in display devices

Method used

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  • Preparation method and application of hydrogenated titanium dioxide nanotube array film
  • Preparation method and application of hydrogenated titanium dioxide nanotube array film
  • Preparation method and application of hydrogenated titanium dioxide nanotube array film

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Take industrial titanium sheets (purity 99.9%), and ultrasonically clean them in acetone, absolute ethanol and deionized water for 15 min respectively; A mixed solution composed of 36% concentrated hydrochloric acid was used to chemically polish the cleaned titanium sheet for 180 s; a constant voltage DC anodizing method was used to grow a titanium dioxide nanotube array film on the surface of the polished titanium sheet at room temperature: graphite was used as the cathode, and the titanium sheet was used as the anode , the distance between the two electrodes was kept at 3 cm, the electrolyte was ethylene glycol solution (analytical grade) containing 0.30 wt.% ammonium fluoride and 0.03 wt.% hydrofluoric acid, the oxidation voltage was 40 V, and the oxidation time was 500 min , and stir the electrolyte with a magnetic stirrer to ensure that the temperature of the system and the electrolyte are uniform. After the oxidation is completed, take out the titanium sheet, rinse...

Embodiment 2

[0040] Take industrial titanium sheets (purity 99.9%), and ultrasonically clean them in acetone, absolute ethanol and deionized water for 15 min respectively; A mixed solution of 38% concentrated hydrochloric acid was used to chemically polish the cleaned titanium sheet for 150 s; a constant voltage direct current anodic oxidation method was used to grow a titanium dioxide nanotube array film on the surface of the polished titanium sheet at room temperature: graphite was the cathode, and the titanium sheet was Anode, the distance between the two electrodes was kept at 2 cm, the electrolyte was ethylene glycol solution (analytical pure) containing 0.20 wt.% ammonium fluoride and 0.05 wt.% hydrofluoric acid, the oxidation voltage was 50 V, and the oxidation time was 600 min. Stir the electrolyte with a magnetic stirrer to ensure that the temperature of the system and the electrolyte are uniform. After the oxidation is completed, take out the titanium sheet, rinse it with deionize...

Embodiment 3

[0045]Take industrial titanium sheets (purity 99.9%), and ultrasonically clean them in acetone, absolute ethanol and deionized water for 15 min respectively; A mixed solution of 37% concentrated hydrochloric acid was used to chemically polish the cleaned titanium sheet for 100 s; a constant voltage DC anodizing method was used to grow a titanium dioxide nanotube array film on the surface of the polished titanium sheet at room temperature: graphite was used as the cathode, and the titanium sheet was used as the anode , the distance between the two electrodes was kept at 5 cm, the electrolyte was ethylene glycol solution (analytical grade) containing 0.25 wt.% ammonium fluoride and 0.02 wt.% hydrofluoric acid, the oxidation voltage was 30 V, and the oxidation time was 315 min , and stir the electrolyte with a magnetic stirrer to ensure that the temperature of the system and the electrolyte are uniform. After the oxidation is completed, take out the titanium sheet, rinse it with d...

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Abstract

The invention provides a preparation method and an application of a hydrogenated titanium dioxide nanotube array film. The preparation method comprises the following steps: cleaning an industrial titanium sheet, and chemically polishing; oxidizing at room temperature through a constant-voltage direct-current anodizing method; and carrying out heat treatment in a vacuum environment in a hydrogen-containing atmosphere, stopping the let-in of hydrogen, and naturally cooling to room temperature in an argon atmosphere to prepare the hydrogenated titanium dioxide nanotube array film. The hydrogenated titanium dioxide nanotube array film can be directly used as a field electron emission cold cathode. The preparation method enables the hydrogenated titanium dioxide nanotube array film having the characteristics of low turn-on field, large emission current density, good field emission stability, high repeatability and the like and directly used as the field electron emission to be prepared; and the preparation method can be used for the industrial production, enables the cold cathode field emitters having low prices to be prepared, and can be well applied in the field electron emission display cathode material field.

Description

technical field [0001] The invention belongs to the technical field of manufacturing field emission cathode materials, and relates to a method for preparing a field emitter, in particular to a method for preparing a hydrogenated titanium dioxide nanotube array film; the invention also relates to a method for using the nanotube array film as a field emitter Emitting cathode material applications. Background technique [0002] Field emission display has the advantages of low power consumption, high brightness, wide viewing angle, short response time, good stability, long life, full-color display, etc. It is a new type of flat panel display device with broad application prospects. For field emission displays to be widely used, field emission cathode materials with excellent performance are one of the most critical technical supports. Currently commonly used field emission cathode materials include carbon nanotubes, metal materials (Mo, W, Co, etc.), nitride materials (TiN, GaN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26B82Y40/00H01J9/02
Inventor 王成伟朱卫东陈建彪李燕王建
Owner NORTHWEST NORMAL UNIVERSITY
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