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Preparation method for electrode with anatase titanium dioxide nanofibre membrane

A technology of titanium dioxide and nanofibers, applied in chemical instruments and methods, cable/conductor manufacturing, circuits, etc., can solve the problem of difficult recycling of photocatalysts, and achieve the effects of low cost, simple preparation process, and large specific surface area

Inactive Publication Date: 2012-01-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing an anatase titanium dioxide nanofiber film electrode. This method has simple preparation technology and low cost, and solves the problem that traditional photocatalysts are difficult to recycle. Allows liquid immersion, can provide a larger specific surface area than particle films, and improve catalytic efficiency

Method used

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  • Preparation method for electrode with anatase titanium dioxide nanofibre membrane
  • Preparation method for electrode with anatase titanium dioxide nanofibre membrane
  • Preparation method for electrode with anatase titanium dioxide nanofibre membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The titanium foil with a purity of 95 wt % and a thickness of 0.1 mm was polished with 320-mesh metallographic sandpaper until the surface was free of scratches. Then, the titanium foil was immersed in acetone, isopropanol, ethanol, and ultrapure water with a resistivity of 18.2 MΩcm for ultrasonic washing for 20 minutes in sequence. Cut the treated titanium foil by 4cm 2 , immersed in a hydrothermal kettle with a volume of 50 mL and a concentration of 1 mol / L sodium hydroxide solution, and placed at 180° C. for 20 hours. After the reaction was completed, the titanium foil was rinsed with ultrapure water and immersed in ultrapure water for 12 hours. After that, the titanium foil was immersed in a 0.5 mol / L nitric acid solution for 12 hours to complete the ion exchange. After taking out, rinse with ultrapure water until the surface of the titanium foil becomes neutral, and finally calcine at 500 °C for 0.5 hours. figure 1 It is a scanning electron microscope image of...

Embodiment 2

[0036] The titanium foil with a purity of 99 wt % and a thickness of 0.1 mm was polished with 600-mesh metallographic sandpaper until the surface had no scratches. Then, the titanium foil was immersed in acetone, isopropanol, ethanol, and ultrapure water with a resistivity of 18.2 MΩcm for ultrasonic washing for 20 minutes in sequence. Cut the treated titanium foil by 4cm 2, immersed in a hydrothermal kettle with a volume of 50 mL and a concentration of 1.5 mol / L sodium hydroxide solution, and placed at 180° C. for 15 hours. After the reaction was completed, the titanium foil was rinsed with ultrapure water and immersed in ultrapure water for 12 hours. After that, the titanium foil was immersed in a 1.0 mol / L nitric acid solution for 10 hours to complete the ion exchange. After taking out, rinse with water until the surface of the titanium foil becomes neutral, and finally calcine at 450 °C for 1 hour. Figure 5 It is a scanning electron microscope image of the surface of t...

Embodiment 3

[0038] The titanium foil with a purity of 98 wt% and a thickness of 0.1 mm was polished with 800-mesh metallographic sandpaper until the surface was scratch-free. Then, the titanium foil was immersed in acetone, isopropanol, ethanol, and ultrapure water with a resistivity of 18.2 MΩcm for ultrasonic washing for 20 minutes in sequence. Cut the treated titanium foil by 4cm 2 , immersed in a hydrothermal kettle with a volume of 50 mL and a concentration of 2.5 mol / L sodium hydroxide solution, and placed at 150° C. for 24 hours. After the reaction was completed, the titanium foil was rinsed with ultrapure water and immersed in ultrapure water for 12 hours. After that, the titanium foil was immersed in a 2 mol / L nitric acid solution for 8 hours to complete the ion exchange. After taking out, rinse with water until the surface of the titanium foil becomes neutral, and finally calcine at 400 °C for 2 hours. Image 6 For the SEM image of the surface of the titanium foil, it can be ...

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Abstract

The invention relates to a preparation method for an electrode with an anatase titanium dioxide nanofibre membrane, which comprises the following steps of (1) polishing the surface of a titanium foil by utilizing sand paper and successively soaking into acetone, isopropanol, ethanol and water for ultrasonic washing; (2) soaking the titanium foil after the processing into a hydrothermal kettle filled with a sodium hydroxide solution and maintaining the temperature of 150 to 180 DEG C for 15 to 24 hours; (3) washing the titanium foil with the water and soaking in the water for 8 to 12 hours after finishing a reaction; (4) soaking the washed titanium foil into a nitric acid solution for 8 to 12 hours; and (5) washing the titanium foil washed with the nitric acid and calcining to prepare the electrode with the anatase titanium dioxide nanofibre membrane on the surface. The invention has the advantages that the preparation technology is simple; the cost is low; the problem of difficult recycle of the traditional optical catalyst is solved; the loose structure of the prepared membrane permits liquid to immerse; and the specific surface area larger than that of a granule membrane can be provided to enhance the catalytic efficiency.

Description

technical field [0001] The invention belongs to the field of preparation of nanofiber thin film electrodes, in particular to a preparation method of anatase titanium dioxide nanofiber thin film electrodes. Background technique [0002] Photocatalytic reaction is a way of using light energy to transform matter, and it is one of the many ways of interaction between light and matter. It is a chemical reaction of matter under the simultaneous action of light and catalyst. Since Fujishima and Honda reported in Nature, 1972, 238, 37-38 in 1972 that they discovered the photoelectric catalytic decomposition of water on n-type semiconductor titanium dioxide electrodes, heterogeneous catalysis has become a research hotspot of scientists from all over the world, and has invested in the field of photocatalysis. A lot of research power. Long-term research has shown that the photocatalytic method can completely mineralize and remove a variety of organic pollutants, which is considered to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B5/00B01J21/06
Inventor 王宏志穆庆辉李耀刚张青红
Owner DONGHUA UNIV