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Method for producing nano-wire array film of titanium dioxide

A nanowire array, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., to achieve the effect of large specific surface area, pure film and ideal crystallization

Inactive Publication Date: 2009-08-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no simple method for preparing titania nanowire array films without adding templates and catalysts.

Method used

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  • Method for producing nano-wire array film of titanium dioxide
  • Method for producing nano-wire array film of titanium dioxide
  • Method for producing nano-wire array film of titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Mix hydrofluoric acid with a concentration of 55% by mass, nitric acid with a concentration of 65% by mass, and deionized water in a volume ratio of 1:3:6 to obtain a pickling solution.

[0022] 2) Add 0.0145 moles of nitric acid and 0.00012 moles of melamine in 50 milliliters of 30% hydrogen peroxide solution in order to obtain a reaction liquid.

[0023] 3) Set the size to 5×5×0.01(cm 3 ) The surface of the metal titanium plate is pickled with the above pickling solution at a temperature of 60° C., and then cleaned with deionized water in ultrasonic waves. The cleaned metal titanium plate was immersed in 50 ml of reaction solution, and reacted at 80° C. for 72 hours.

[0024] 4) The reacted titanium plate was gently rinsed with deionized water, dried and placed in a muffle furnace at 450° C. for 1 hour.

[0025] Response result:

[0026] The surface of the titanium plate is uniformly generated as figure 1 In the titanium dioxide nanowire array film shown, the a...

Embodiment 2

[0028] 1) with embodiment 1.

[0029] 2) Add 0.00870 moles of nitric acid and 0.00012 moles of melamine in 50 milliliters of 30% hydrogen peroxide solution in order to obtain a reaction liquid.

[0030] 3) with embodiment 1.

[0031] 4) The reacted titanium plate was gently rinsed with deionized water, dried and placed in a muffle furnace at 550° C. for 1 hour.

[0032] Response result:

[0033] The surface of the titanium plate is uniformly generated as image 3 In the titanium dioxide nanowire array film shown, the average diameter of the nanowire array is 25 nm, and the aspect ratio is about 25.

Embodiment 3

[0035] 1) with embodiment 1.

[0036] 2) Add 0.0290 moles of nitric acid and 0.00012 moles of melamine in 50 milliliters of 30% hydrogen peroxide solution in order to obtain a reaction solution.

[0037] 3) with embodiment 1.

[0038] 4) The reacted titanium plate was gently rinsed with deionized water, dried and placed in a muffle furnace at 350° C. for 1 hour.

[0039] Response result:

[0040] The top of the titanium dioxide nanowire array is uniformly dispersed with a small amount of titanium dioxide aggregates with a nanoflower structure of about 1 micron in size, such as Figure 4 as shown in b. This structure can obtain better photocatalytic performance than pure nanowires.

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Abstract

The invention discloses a method for preparing a titanium dioxide nano-wire array film. The method comprises the following steps: mixing hydrofluoric acid, nitric acid and deionized water to prepare an acid wash; adding melamine and nitric acid into a hydrogen peroxide solution to obtain a reaction solution; washing the surface of a metal titanium plate by the acid wash to be immersed in the reaction solution to react for 60 to 72 hours at a temperature of between 60 and 90 DEG C; and washing the reacted titanium plate by the deionized water to be dried, and insulating the titanium plate for 1 to 2 hours at a temperature of between 350 and 550 DEG C. The method for preparing the titanium dioxide nano-wire array film does not need a template or a catalyst, and has the advantages of simpleness and feasibility, low cost, pure film, regular size arrangement, perfect crystallization, large specific surface area and firm combination with a substrate, and the titanium dioxide nano-wire array film has wide application in photocatalysis, photoelectrocatalysis, thin-film solar cell, gas sensor, cold cathode electronic emission and other fields.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide nanowire arrays. Background technique [0002] TiO thin films have a wide range of potential applications in photocatalysis, photoelectrocatalysis, gas sensors, thin-film solar cells, electrochromic thin films, and field emission. Titanium dioxide ordered array films with nanostructures such as nanorods, nanoflowers, nanotubes, and nanowires have extremely high specific surface areas, and thus exhibit excellent performance in the above applications. In addition, compared with dense films composed of ordinary nanoparticles, ordered array films such as titanium dioxide nanorods and nanowires have better space charge separation effects, which are important for photocatalysis, photoelectrocatalysis and photoanodes. . So far, whether it is anatase or rutile phase titanium dioxide nanowire arrays, most of them are made by the following different methods: cathode-induced sol-gel filling of ano...

Claims

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Application Information

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IPC IPC(8): C01G23/047
Inventor 吴进明薛红星
Owner ZHEJIANG UNIV
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