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Samarium/nitrogen-co-doped titanium dioxide catalyst capable of responding to visible light and preparation method thereof

A technology of co-doping and catalyst, which is applied in the preparation of nano-co-doped TiO2 catalytic film and the field of visible light-responsive nano-co-doped TiO2 powder, can solve problems such as low photon quantum efficiency, and achieve improved photocatalytic activity, reliable materials, The effect of preventing churn

Inactive Publication Date: 2012-11-07
JIANGSU GAOCHUN CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Nano-TiO 2 As a photocatalyst, it has the characteristics of chemical stability, non-toxicity, low price, good photocatalytic activity and no secondary pollution, but pure nano-TiO 2 It can only absorb ultraviolet light with a wavelength shorter than 387nm, has no photocatalytic activity for visible light with a wavelength of 400-800nm, and factors such as low photon quantum efficiency limit its practical application and development.

Method used

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  • Samarium/nitrogen-co-doped titanium dioxide catalyst capable of responding to visible light and preparation method thereof
  • Samarium/nitrogen-co-doped titanium dioxide catalyst capable of responding to visible light and preparation method thereof

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Embodiment

[0031] Embodiment: Made samarium / nitrogen co-doped nano-TiO according to the above method 2 powder 300g; samarium / nitrogen co-doped TiO loaded on stoneware sheets 2 40 pieces of photocatalytic film, the size of the carrier is 100mm×50mm×3mm, the main properties measured are as follows:

[0032] 1. SEM measurements show that two kinds of samarium / nitrogen co-doped TiO 2 The crystal grain of the catalyst is about 15-30nm, the surface of the photocatalytic film is flat, the thickness of the film is 300-400nm, and the doped particles are arranged neatly.

[0033] 2. XRD measurement shows that samarium / nitrogen co-doped TiO 2 The main crystal phase of the powder is anatase, and no Sm 3+ And N corresponds to the generation of oxide phase. Due to Sm / N co-doped TiO 2 The preparation raw materials and process of the thin film are the same as those of the powder state, so it can also be considered that the XRD results of the two are the same.

[0034] 3. The measurement of UV-Vis ...

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Abstract

The invention provides a samarium / nitrogen-co-doped titanium dioxide catalyst capable of responding to visible light and a preparation method thereof. Mass ratio of the catalyst is Sm:N:TiO2=0.01-0.16:0.40-1.88:97.94-99.54. The catalyst has two forms, namely, a nano TiO2 powder catalyst prepared by doping rare earth samarium ion with nonmetal N, and a samarium / nitrogen-co-doped nano TiO2 thin film loaded on a ceramic carrier. A sol-gel method is used to prepare the nano TiO2 powder catalyst doping the rare earth samarium ion with the nonmetal N and the loaded doped nano TiO2 thin film. The two forms of the photocatalyst are prepared after doped TiO2 sol is prepared. The doped nano TiO2 powder catalyst and the samarium / nitrogen-co-doped nano TiO2 thin film are more efficient than pure TiO2 under same conditions.

Description

technical field [0001] The present invention relates to samarium / nitrogen co-doped TiO 2 Preparation method of photocatalyst, especially visible light responsive nanometer co-doped TiO 2 Powder and nano co-doped TiO 2 Preparation method of catalytic membrane. technical background [0002] Nano-TiO 2 As a photocatalyst, it has the characteristics of chemical stability, non-toxicity, low price, good photocatalytic activity and no secondary pollution, but pure nano-TiO 2 It can only absorb ultraviolet light with a wavelength shorter than 387nm, has no photocatalytic activity for visible light with a wavelength of 400-800nm, and factors such as low photon quantum efficiency limit its practical application and development. About modified TiO 2 There have been many reports and patents, including TiO 2 Metal doping and non-metal doping, TiO 2 Fixing technology, etc.: [0003] CN101074113 discloses a non-metal doped nano-TiO 2 The preparation method of the method uses the n...

Claims

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Application Information

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IPC IPC(8): B01J27/24
Inventor 谷昌军孔德双孔令仁
Owner JIANGSU GAOCHUN CERAMICS