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Nanofiber of niobium doped monoclinic system TiO2

A technology of monoclinic crystal system and nanofibers, which is applied in the direction of nanotechnology, titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of poor crystallization stability of products, and achieve the effect of stable crystallinity and controllable morphology

Inactive Publication Date: 2013-06-26
李磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation cost of the solid state reaction method is low, and it can be conveniently carried out in industrialized production, the shape of the obtained particles is usually rod-shaped, and the stability of the crystallization of the product is relatively poor.

Method used

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  • Nanofiber of niobium doped monoclinic system TiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, anatase TiO with a particle size of about 0.02nm and containing 0.26wt% niobium was selected. 2 , and 10mol / L NaOH solution as the reaction raw material, wherein the ratio is every 12g of high-purity anatase TiO 2 Corresponding to 100ml of NaOH solution;

[0019] Second, the high-purity anatase TiO 2 Mix with NaOH solution in a closed high-pressure container and stir to carry out hydrothermal synthesis reaction, wherein the reaction conditions are carried out at a temperature of 380°C and a pressure of 25.0MPa, and the reaction time is 2.5h;

[0020] Third, the hydrothermal synthesis reaction product is washed with deionized water, and the number of washings is 5 times;

[0021] Fourth, the washed hydrothermal synthesis reaction product is subjected to ion exchange reaction in 0.1mol / L hydrochloric acid solution, wherein the reaction temperature is 65°C, and the reaction time is 1.8h;

[0022] Fifth, the ion exchange reaction product is heat-treated under atmo...

Embodiment 2

[0024] Except that the raw material is anatase TiO containing 0.28wt% niobium 2 Except, all the other reaction conditions are the same as in Example 1.

Embodiment 3

[0026] Except that the raw material is anatase TiO containing 0.30wt% niobium 2 Except, all the other reaction conditions are the same as in Example 1.

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Abstract

The invention relates to nanofiber of a niobium doped monoclinic system TiO2 with excellent crystallinity and conductivity. The nanofiber of a monoclinic system TiO2 with stable crystallinity and controllable shape is obtained mainly by adopting moderate hydrothermal reaction temperature and pressure, wherein the fiber diameter of the nanofiber of TiO2 is about 70-90nm, and the nanofiber is still not converted into other crystal phases at a high temperature of 800 DEG C, and the conductivity is about 1S / s order of magnitude.

Description

technical field [0001] The present invention relates to a kind of TiO 2 , especially a niobium-doped monoclinic TiO with excellent crystallinity and electrical conductivity 2 of nanofibers. Background technique [0002] Titanium dioxide is favored in the technical field of photocatalytic degradation of organic pollutants due to its advantages of non-toxicity, high efficiency, good chemical stability, strong oxidation ability and low price. TiO 2 Common crystal forms mainly include the following types: anatase (tetragonal), rutile (tetragonal), brookite (orthorhombic) and monoclinic. Among them, the anatase type and rutile type are widely concerned and researched at present. Although the crystallization properties of anatase and rutile are also excellent, compared with them, monoclinic TiO 2 It also has more advantages, such as excellent electrical conductivity, so that the monoclinic TiO 2 It is expected to be more widely used in fields such as lithium battery anode ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
Inventor 李磊
Owner 李磊