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Nickel-doped lanthanum ferrite/clay nano-structure composite and preparation method and application thereof

A composite material and nanostructure technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of ecological environment and human health hazards, low utilization of visible light, high working temperature, and achieve Increased lattice defects, beneficial to catalytic activity and uniform loading

Active Publication Date: 2016-06-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The removal of nitrogen oxides will be a very serious challenge, in which NH 3 Selective catalytic reduction technology (NH 3 -SCR) are widely used due to the widespread use of V 2 o 5 / TiO 2 Catalysts, there is a high working temperature, the active component V 2 o 5 It has disadvantages such as harm to the ecological environment and human health, so the development of environmentally friendly low-temperature NH 3 -SCR reaction catalyst is necessary
The use of light energy to catalyze the degradation of pollutants as a new and potential denitrification technology has become a hot spot in environmental protection scientific research. In recent years, the Tanaka research group in Japan reported that TiO 2 or modified TiO 2 Photo-SCR denitrification technology for catalysts, but due to TiO 2 The bandgap width is relatively high, and high-energy ultraviolet light is generally required, so the utilization rate of visible light, which accounts for the vast majority of solar energy, is low
It is of great significance to seek photo-SCR denitrification technology with visible light response, which has not been reported so far

Method used

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  • Nickel-doped lanthanum ferrite/clay nano-structure composite and preparation method and application thereof
  • Nickel-doped lanthanum ferrite/clay nano-structure composite and preparation method and application thereof
  • Nickel-doped lanthanum ferrite/clay nano-structure composite and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First weigh 0.2666g of lanthanum nitrate, 0.0716g of nickel nitrate, 0.2320g of ferric nitrate dissolved in 100ml of deionized water, then add 0.4162g of complexing agent citric acid and finally add 1g of attapulgite and stir for 2h to obtain a mixed solution. Then place it in a 70°C water bath in a water bath, wait for the water to evaporate to obtain a wet gel, dry it in a drying oven at 80°C, and place it in a muffle furnace at 550°C (heating rate 1 °C / min) calcined for 2h, and finally ground to obtain a nickel-doped lanthanum ferrite / attapulgite nanostructure composite LaFe with a loading of 20wt%. 0.7 Ni 0.3 o 3 / Attapulgite (the mass ratio of nickel-doped lanthanum ferrite to attapulgite clay is 1:5);

[0023] On the basis of the above process in Example 1, the (undoped) lanthanum ferrite / attapulgite nanostructure composite (LaFeO 3 The mass ratio to attapulgite clay is 1:5).

[0024] The obtained sample is subjected to X-ray powder diffraction experiment, and...

Embodiment 2

[0029] First weigh 0.211g of lanthanum nitrate and 0.234g, 0.11g of nickel nitrate and iron nitrate dissolved in 100ml of deionized water, then add 0.168g of complexing agent citric acid, and finally add 1g of attapulgite and stir for 2 hours to obtain a mixed solution Then place it in a 70°C water bath in a water bath, wait for the water to evaporate to obtain a wet gel, dry it in a drying oven at 80°C, and place it in a muffle furnace at 550°C (heating rate 1 °C / min) and calcined for 2 h, and finally ground to obtain a nickel-doped lanthanum ferrite / attapulgite nanostructure composite material with a loading of 20 wt%, and the subsequent detection was as in Example 1.

Embodiment 3

[0031] First weigh 0.176g of lanthanum nitrate and 0.214g, 0.25g of nickel nitrate, and dissolve ferric nitrate in 100ml of deionized water, then add 0.168g of complexing agent citric acid, and finally add 1g of attapulgite and stir for 2 hours to obtain a mixed solution Then place it in a 70°C water bath in a water bath, wait for the water to evaporate to obtain a wet gel, dry it in a drying oven at 80°C, and place it in a muffle furnace at 550°C (heating rate 1 °C / min) and calcined for 2 h, and finally ground to obtain a nickel-doped lanthanum ferrite / attapulgite nanostructure composite material with a loading of 20 wt%, and the subsequent detection was as in Example 1.

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Abstract

The invention belongs to the new field of chemical engineering, and particularly relates to a nano material with clay as a carrier and perovskite type compound nano particles as active components and a preparation method and application thereof to the field of optical coupling-SCR denitration. Lanthanum nitrate, nickel nitrate, ferric nitrate, citric acid and the clay are added to deionized water to be stirred, then the mixture is transferred into a water bath kettle to evaporate to obtain wet gel, and the nano material can be obtained through drying, calcining and drying. The composite is adopted as a catalyst for photocatalytic denitration, and compared with traditional SCR denitration, the amount of adopted NH3 is reduced, and the conversion efficiency on NO at low temperature is improved.

Description

technical field [0001] The invention belongs to the new field of chemical engineering, and in particular relates to a nanomaterial with clay as a carrier and perovskite compound nanoparticles as an active component, a preparation method thereof, and an application in the field of optical coupling-SCR denitrification. Background technique [0002] In recent years, the pollution of nitrogen oxides has become more and more serious. As one of the main pollutants in the atmosphere, nitrogen oxides have caused great harm to human health and living environment, such as respiratory diseases, acid rain, photochemical smog and solid particles PM2.5, etc. Therefore, the pollution prevention and control of nitrogen oxides has become particularly urgent. [0003] The removal of nitrogen oxides will be a very serious challenge, in which NH 3 Selective catalytic reduction technology (NH 3 -SCR) are widely used due to the widespread use of V 2 o 5 / TiO 2 Catalysts, there is a high work...

Claims

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Application Information

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IPC IPC(8): B01J23/83B82Y30/00B82Y40/00B01D53/86B01D53/56
CPCB01D53/8628B82Y30/00B82Y40/00B01J23/83B01D2255/802B01J35/39
Inventor 李霞章朱伟姚超罗士平左士祥陆晓旺吴凤芹
Owner CHANGZHOU UNIV
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