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Preparation method of carbon and nitrogen modified nano-titanium dioxide thin film with visible light activity

A nano-titanium dioxide and nano-film technology, which is applied in the field of preparation of carbon-nitrogen modified nano-titanium dioxide films, can solve the problems of high cost, complex equipment and process, and achieve the effects of low cost, wide application space and increased specific surface area.

Inactive Publication Date: 2011-09-28
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After literature search, it is found that the patent application number is: 03140525.8, and the patent name is: Nitrogen-containing titanium dioxide photocatalytic film and its preparation method. Nitrogen-containing titanium dioxide thin film, but the method is complicated in equipment and process, and the cost is high

Method used

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  • Preparation method of carbon and nitrogen modified nano-titanium dioxide thin film with visible light activity
  • Preparation method of carbon and nitrogen modified nano-titanium dioxide thin film with visible light activity
  • Preparation method of carbon and nitrogen modified nano-titanium dioxide thin film with visible light activity

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Put the pre-polished 2*4cm 2 The metal titanium sheet was etched with 5wt% oxalic acid solution at 90°C for 1 hour, ultrasonically cleaned with deionized water for 5 minutes and dried at 80°C for 1 hour to obtain a clean surface titanium sheet

[0025] 2) The titanium sheet was immersed in 50 mL hydrogen peroxide solution (10%) and placed in a closed reaction kettle and reacted in an oven at 80° C. for 24 hours. After the reaction, the peroxotitanic acid nano film on the titanium base is obtained, and the nano flower-like structure generated on the surface is as follows: figure 1 shown.

[0026] 3) Soak the titanium sheet of the peroxotitanic acid film formed above in 40mL deionized water, place it in a 50mL hydrothermal reaction kettle for 72 hours at 120°C, and dry it to obtain titanium oxide nanoparticles on the surface of metal titanium. film.

[0027] 4) Place the metal titanium sheet with titanium oxide nanofilm formed on the surface and 2 g of urea at both ...

Embodiment 2

[0030] 1) Put the pre-polished 2*4cm 2 The metal titanium sheet was etched with 5 wt% oxalic acid solution at 90° C. for 1 hour, ultrasonically cleaned with deionized water, and dried at 80° C. for 1 hour to obtain a metal titanium sheet with a clean surface.

[0031] 2) The titanium sheet was immersed in 50 mL of hydrogen peroxide (3%), placed in a closed reaction kettle and reacted in an oven at 80° C. for 24 hours. After the reaction is finished, a titanate nano flower-like film on the titanium base is obtained.

[0032] 3) Soak the titanium sheet of the peroxotitanic acid film formed above in 40mL of deionized water, place it in a 50mL hydrothermal reaction kettle for hydrothermal reaction at 150°C for 24 hours, and dry it after the reaction to obtain titanium oxide nanoparticles on the surface of metal titanium. film, the surface structure of which is figure 2 shown.

[0033] 4) Place the metal titanium sheet with titanium oxide nanofilm formed on the surface and 2 g ...

Embodiment 3

[0036] 1) Put the pre-polished 2*4cm 2 The metal titanium sheet was etched with 5wt% oxalic acid solution at 100°C for 30 minutes, ultrasonically cleaned with deionized water for 5 minutes and dried at 80°C for 1 hour to obtain a clean surface titanium sheet

[0037] 2) The titanium sheet was immersed in 50 mL of hydrogen peroxide solution (5%) and placed in a closed reaction kettle and reacted in an oven at 80° C. for 8 hours. After the reaction is finished, a peroxotitanic acid nano film on the titanium base is obtained.

[0038] 3) Soak the titanium sheet of the peroxotitanic acid film formed above in 40mL deionized water, place it in a 50mL hydrothermal reaction kettle for hydrothermal reaction at 180°C for 24 hours, and dry it after the reaction to obtain titanium oxide nanoparticles on the surface of metal titanium. film.

[0039] 4) Place the metal titanium sheet and 2 g of urea on the two ends of the reactor with the above-mentioned titanium oxide nano-film formed on...

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Abstract

The invention relates to a preparation method of a carbon and nitrogen modified nano-titanium dioxide thin film with visible light activity, which belongs to the field of nanotechnology. The preparation method comprises the following steps: 1) etching and cleaning the surface of metal titanium; 2) adopting hydrogen peroxide solution for oxidizing the surface of the metal titanium, thereby forminga peroxotitanium acid nano flower-like thin film; 3) adopting the hydrothermal method for forming a titanium dioxide nano-thin film; and 4) calcining in the urealysis atmosphere for forming a modified titanium dioxide nanowire thin film. The preparation method has the advantages of simplicity, easy operation and low cost and is applicable to large-scale industrial production, and the prepared modified titanium oxide thin film has the photocatalytic degradation capability to organic matters under the radiation of visible light.

Description

technical field [0001] The invention relates to a method for preparing a film in the field of nanotechnology, in particular to a method for preparing a carbon-nitrogen modified nano-titanium dioxide film with visible light activity. Background technique [0002] Since the discovery of semiconductor titanium dioxide (TiO2) in 1972 2 ) since the decomposition of water into hydrogen and oxygen under ultraviolet light irradiation, the research on photocatalytic technology and photoelectrochemistry based on titanium dioxide has been very active, and has been widely used in the development of photoelectric conversion solar cells, gas sensors, and solar water splitting. Photocatalytic degradation of hydrogen, sewage and waste gas, photocatalytic sterilization, self-cleaning and anti-fog, etc. [0003] Titanium dioxide has low cost, no secondary pollution, stable performance, and the power to drive the photocatalytic reaction comes from clean light energy. Internationally, especia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J21/18B01J27/24B01J37/10
Inventor 蔡伟民吴亚惠龙明策
Owner SHANGHAI JIAOTONG UNIV
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