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Carbon quantum dot modified lanthanum ferrite/attapulgite nanocomposite material and preparation method and application thereof

A nano-composite material and carbon quantum dot technology are applied in the field of lanthanum ferrite/attapulgite nano-composite materials and their preparation, which can solve the problems of low low temperature activity and high energy consumption, reduce energy consumption, promote absorption, and reduce costs Effect

Active Publication Date: 2017-07-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional denitrification method is mainly selective catalytic reduction (SCR), which mainly uses vanadium-titanium catalysts, ammonia or urea as reducing agents to decompose nitrogen oxides into harmless nitrogen, but has low low-temperature activity and energy consumption. big disadvantage

Method used

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  • Carbon quantum dot modified lanthanum ferrite/attapulgite nanocomposite material and preparation method and application thereof
  • Carbon quantum dot modified lanthanum ferrite/attapulgite nanocomposite material and preparation method and application thereof
  • Carbon quantum dot modified lanthanum ferrite/attapulgite nanocomposite material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Preparation of carbon quantum dots:

[0023] Weigh 0.53g of citric acid and dissolve it in 20ml of hydrogen peroxide with a hydrogen peroxide concentration of 0.055mol / L, and ultrasonically dissolve it for 10min to obtain a colorless solution; React for 8 hours; after the reaction, take out the reaction kettle, centrifuge the obtained solution first, then transfer it to a dialysis bag (MWCO = 1000) for secondary water dialysis for 12 hours, and finally transfer it to a vacuum oven at 70°C for drying to obtain carbon quantum dot particles CQDs;

[0024] (1) Add 0.4012g of lanthanum nitrate, 0.4988g of ferric nitrate, 0.5g of citric acid and 1g of attapulgite into 100ml of deionized water and stir well, then transfer to a water bath, evaporate at 60°C for 18h to obtain a wet gel, 80°C After drying, calcinate at 600°C (heating rate: 1°C / min) for 2 hours, and grind to obtain LaFeO 3 / ATP nanocomposites;

[0025] (2) 0.03g of the carbon quantum dot particles prepared abov...

Embodiment 2

[0040](1) with embodiment 1;

[0041] (2) 0.01g of carbon quantum dot particles prepared in Example 1 is dissolved in 20ml of deionized water to obtain a carbon quantum dot solution, and the LaFeO obtained in step (1) is taken 3 Immerse 1 g of the ATP nanocomposite material in the carbon quantum dot solution at room temperature (25° C.) for 24 hours, dry at 100° C. and then grind to obtain a carbon quantum dot-modified lanthanum ferrite / attapulgite nanocomposite material.

Embodiment 3

[0043] (1) with embodiment 1;

[0044] (2) 0.02g of carbon quantum dot particles prepared in Example 1 is dissolved in 20ml of deionized water to obtain a carbon quantum dot solution, and the LaFeO obtained in step (1) is taken 3 Immerse 1 g of ATP nanocomposite material in the carbon quantum dot solution at room temperature (25° C.) for 20 h, dry at 80° C. and grind to obtain carbon quantum dot-modified lanthanum ferrite / attapulgite nanocomposite material.

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Abstract

The invention belongs to the technical field of denitration catalyzed production in environmental protection and particularly relates to a carbon quantum dot modified lanthanum ferrite / attapulgite nanocomposite material and a preparation method and application thereof. Lanthanum nitrate, ferric nitrate, citric acid and attapulgite are added into deionized water for full mixing, then the mixture is transferred to a water bath pot, evaporation is performed at the temperature of 50-100 DEG C to obtain wet gel, drying and calcination is performed, then the mixture is impregnated a carbon quantum dot solution, and drying and grinding are performed. The composite material is adopted as a catalyst to perform photocatalytic denitration. Compared with traditional SCR denitration, the energy consumption is greatly reduced, the NO conversion efficiency is obviously improved at low temperature.

Description

technical field [0001] The invention belongs to the technical field of denitrification catalyst production in environmental protection, and in particular relates to a carbon quantum dot-modified lanthanum ferrite / attapulgite nanocomposite material and a preparation method and application thereof. Background technique [0002] In recent years, air pollution 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 particulate matter PM2.5 etc. Therefore, the pollution control of nitrogen oxides has become particularly urgent. [0003] The traditional denitration method is mainly selective catalytic reduction (SCR), which mainly uses vanadium-titanium catalysts, ammonia or urea as reducing agents to decompose nitrogen oxides into harmless nitrogen, but has low low-temperature activity and energy consumptio...

Claims

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Application Information

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IPC IPC(8): B01J23/825B01D53/86B01D53/56
CPCB01D53/8628B01D2251/2062B01J23/825
Inventor 李霞章石海洋陆晓旺姚超左士祥罗士平李忠玉
Owner CHANGZHOU UNIV
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