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Titanium dioxide nanofiber-nanotube with hierarchical structure and preparation method thereof

A titanium dioxide and nanofiber technology, applied in the field of nanomaterials, can solve the problems of complex reaction process, high equipment requirements, low stability of product hierarchical structure, etc., and achieve the effects of high repeatability, simplicity and low cost

Active Publication Date: 2021-09-17
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although a variety of hierarchical structures have been prepared so far, which have significantly optimized the performance of titanium dioxide nanomaterials, there are various deficiencies in the current research situation, such as the complex reaction process, high equipment requirements, and low stability of the product hierarchical structure. These deficiencies directly lead to the fact that the existing technology can only stay in the laboratory stage, which greatly limits its promotion and application.

Method used

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  • Titanium dioxide nanofiber-nanotube with hierarchical structure and preparation method thereof
  • Titanium dioxide nanofiber-nanotube with hierarchical structure and preparation method thereof
  • Titanium dioxide nanofiber-nanotube with hierarchical structure and preparation method thereof

Examples

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Embodiment 1

[0032] Such as figure 1 As shown, a titanium dioxide nanofiber-nanotube with a hierarchical structure includes honeycomb titanium dioxide nanotubes, the surface of the titanium dioxide nanotubes is evenly coated with titanium dioxide nanofibers, and the diameter of the titanium dioxide nanotubes is 100- 150 nanometers, the tube length is 5-10 microns, and the thickness of the titanium dioxide nanofiber is 5-20 nanometers. .

Embodiment 2

[0034] A method for preparing titanium dioxide nanofibers-nanotubes with a hierarchical structure, comprising the steps of,

[0035] S1. Put the titanium sheet in an acidic polishing solution and polish it for 20s. The acidic polishing solution is uniformly mixed with hydrofluoric acid: nitric acid: water according to the volume ratio of 1:1:2, immersed in deionized water for 10s, and then ultrasonically cleaned Until the surface of the titanium sheet is uniformly silver-white and matte;

[0036] S2. Configure 0.1 mol / L ammonium fluoride-ethylene glycol solution, dissolve 0.74g ammonium fluoride in 2ml deionized water, pour ethylene glycol to 200ml under magnetic stirring conditions, and continue stirring at 25°C for 15min , until there is no insoluble matter, the electrolyte is obtained;

[0037]S3. Pour the electrolyte obtained in S2 into the electrolytic cell, use the platinum sheet as the cathode, and the polished titanium sheet as the anode, and react at 25°C for 4 hours...

Embodiment 3

[0040] The difference between this example and Example 2 lies in "in S4, at 150°C, react for 2 hours".

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Abstract

The invention belongs to the field of nanomaterials, and in particular relates to a titanium dioxide nanofiber-nanotube with a hierarchical structure, including honeycomb-shaped titanium dioxide nanotubes, and the surface of the titanium dioxide nanotubes is evenly coated with titanium dioxide nanofibers. The beneficial effect of the present invention is: the titania nanofiber / nanotube structure prepared by the present invention has a large amount of pore structures (diameter 100-150 nanometers, tube length 5-10 microns) to be beneficial to collect reaction medium and transport electron, make it have Excellent photoelectric properties. 2. The titanium dioxide nanofiber-nanotube prepared by the present invention is irradiated by visible light, and the photocurrent it produces is at least three times that of a simple titanium dioxide nanotube, and the reaction time from generating photocurrent to photocurrent stabilization is 1-2. 2s, which is much smaller than the 20s of pure titania nanotubes.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a titanium dioxide nanofiber-nanotube with a hierarchical structure and a preparation method thereof. Background technique [0002] The preparation and application of materials related to energy and environmental issues is a major topic in the field of functional materials research. As a classic semiconductor optoelectronic material, titanium dioxide nanomaterials have the characteristics of rich and controllable morphology, large specific surface area, high light energy capture efficiency, and can effectively promote the separation and transfer of photogenerated carriers. It has great advantages in separation and contact with media, so it has high hopes in the fields of pollution control and energy utilization. Because the microstructure of the material has an extremely important impact on the performance of the material, the synthesis of titanium dioxide material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047C25D11/26B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01G23/047C01P2004/03C01P2004/13C01P2004/84C01P2006/40C25D11/26
Inventor 李自亮张苗王艳芬余海孙兆奇何刚杨蕾吕建国
Owner ANHUI UNIVERSITY
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