A preparation method of visible light active nitrogen doping nanometer titania film

A nano-titanium dioxide and visible light technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of NH3 toxicity and achieve good visible light activity and simple process

Inactive Publication Date: 2008-04-09
FUDAN UNIV
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  • A preparation method of visible light active nitrogen doping nanometer titania film
  • A preparation method of visible light active nitrogen doping nanometer titania film
  • A preparation method of visible light active nitrogen doping nanometer titania film

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Embodiment 1

[0019] Embodiment 1: prepare titanium nitride thin film on the surface of Ti sheet by electrophoretic deposition method at room temperature, clean Ti sheet (thickness 0.1mm, area is 3.14cm 2 ) was fixed in the electrolytic cell, the potential of the potentiostat was adjusted to 10V, and the electrolyte was a suspension of titanium nitride containing 10g / L, and electrophoretic deposition was performed for 1 hour to obtain a golden yellow TiN thin film. The obtained TiN thin film was heat-treated at 350 °C in the air atmosphere, at which time TiN was transformed into nitrogen-containing TiO 2 The thin film exhibits good photoelectric response under visible light, which indicates its application in visible light photocatalysis and photo-splitting of water. Figure 2 shows nitrogen-containing TiO obtained by electrophoretic deposition of TiN 2 The open circuit voltage of the film, it can be seen that the photovoltage under white light and visible light is 2.8 and 1.2mV / mW.cm 2 . ...

Embodiment 2

[0020] Example 2: Prepare a titanium nitride film on the Ti surface by electrophoretic deposition at room temperature, and clean the Ti sheet (thickness 0.1mm, area is 3.14cm 2 ) is fixed in the electrolytic cell, and the opposite electrode adopts a metal Pt sheet, the potential of the potentiostat is adjusted to 10V, the distance between the electrodes is 1cm, and the titanium nitride suspension containing 10g / L is used for electrophoretic deposition for 2 hours to obtain yellow TiN thin film. The obtained TiN thin film was heat-treated at 350 °C in the air atmosphere, at which time TiN was transformed into nitrogen-containing TiO 2 thin film with photocurrents of 39.1 and 0.23 μA / cm under white light and visible light, respectively 2 As shown in Figure 4a and Figure 5a.

Embodiment 3

[0021] Example 3: Prepare a titanium nitride thin film on the Ti surface by electrophoretic deposition at room temperature, and clean the Ti sheet (thickness 0.1mm, area is 3.14cm 2 ) is fixed in the electrolytic cell, the opposite electrode is made of metal Pt sheet, the potential of the potentiostat is adjusted to 10V, the distance between the electrodes is 1cm, and the titanium nitride suspension containing 10g / L is used for electrophoretic deposition for 1 hour to obtain dark Yellow TiN film. The obtained TiN thin film was heat-treated at 350 °C in the air atmosphere, at which time TiN was transformed into nitrogen-containing TiO 2 thin film with photocurrents of 12.8 and 0.08 μA / cm under white light and visible light, respectively 2 . As shown in Figure 4b and Figure 5b.

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Abstract

The invention belongs to the titanium dioxide photocatalysis chemical engineering technical field, in particular to a preparation method for preparing a titanium dioxide film with a visible light active nitrogen adulterate nanometer structure. The method takes titanium nitride nano powder as raw material, and firstly titanium nitride film is prepared through the electrophoretic deposition or the magnetron sputtering method; the heating processing is performed to the titanium nitride film, the temperature of the heating processing is controlled at 350 DEG C to 600 DEG C, the oxidating time needs 1 to 2 hours, when the color of the titanium nitride film changes, the visible light active nitrogen adulterate film TiO2 is formed. The method process of the invention is simple, safe, and environmental, and the poisonous NH3 using is avoided.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide photocatalytic chemical industry, and in particular relates to a new method for preparing titanium dioxide film with visible light active nitrogen-doped nanostructure. Background technique [0002] Since the discovery in 1972 that the semiconductor titanium dioxide can decompose water into hydrogen and oxygen under ultraviolet light, titanium dioxide has received a lot of attention in the field of materials. TiO 2 It can be used in many aspects such as photocatalytic degradation of organic matter, sterilization and disinfection, sewage treatment, air purification, photolysis of water and hydrogen production. At present, nano-TiO 2 The research on the preparation method has become a very active topic in the development of new photocatalytic materials. Due to TiO 2 The bandgap width is large (3.2eV sharp ore type, 3.0eV rutile type), and the absorption of visible light is poor, which gre...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 崔晓莉马明
Owner FUDAN UNIV
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