Large-area growing method for single crystal titanium dioxide nano rod and application of nano rod

A technology of titanium dioxide and growth method, which is applied in the field of nanomaterials, can solve the problems of increasing process difficulty and high vacuum degree of reaction temperature, and achieve the effect of improving field enhancement factor, low turn-on electric field emission, and realizing turn-on electric field emission
CN102146586BInactive Publication Date: 2013-01-30NORTHWEST NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHWEST NORMAL UNIVERSITY
Publication Date
2013-01-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a large-area growing method for a single crystal titanium dioxide nano rod and application of the nano rod. The method comprises the following steps of: putting a cleaned titanium sheet into acid solution, performing chemical oxidation to obtain a counter electrode, performing electrochemical deposition in NiSO4.6H2O solution to form a layer of nickel metal nano granules on the surface of the titanium sheet, and growing a single crystal titanium dioxide nano rod array structure in a reaction cavity of a chemical vapor deposition system; pre-vacuumizing the reaction cavity, and simultaneously heating; when the pressure intensity of the reaction chamber is reduced to 10 to 100 Pa, introducing hydrogen to deoxidize the nickel metal nano granules; when the temperature in the reaction cavity is raised to between 700 and 850 DEG C, stopping introducing the hydrogen, and introducing carrier gas and acetylene so that the titanium dioxide granule film is reconstructed to grow the single crystal titanium dioxide nano rod; and naturally cooling the film to room temperature to obtain the single crystal titanium dioxide nano rod. The single crystal titanium dioxide nano rod is directly used as a field emitting cold cathode. The growing method can prepare the single crystal titanium dioxide nano rod directly used as the field emitting cold cathode at low temperature under low vacuum degree.
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Description

technical field

[0001] The invention belongs to the technical field of nanometer materials, and relates to a large-area growth method of single-crystal titanium dioxide nanorods; the invention also relates to the application of the nanorods prepared by the method. Background technique

[0002] Titanium dioxide (TiO 2 ) is a wide-bandgap semiconductor material, non-toxic, and a green environmental protection material with chemical inertness and relatively small work function (4.3 eV). Its unique photosensitive, moisture sensitive, gas sensitive, photocatalytic and strong ultraviolet absorption The characteristics have been applied in solar cells, photocatalysis, and sensitive devices. In recent years, the preparation of nanostructured titanium dioxide and its field emission properties have attracted attention, and there are nanotubes, nanospheres, nanorods, etc.

[0003] Titanium dioxide nanorods have good field emission properties, and field emission is widely used in micr...

Claims

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