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Environment-friendly nano material for automobile tail gas nitric oxide catalysis purification and preparation method of environment-friendly nano material

A nitrogen oxide, catalytic purification technology, applied in the direction of nanotechnology for materials and surface science, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of easy particle agglomeration and productivity Low cost, high preparation cost, etc., to achieve the effect of low preparation cost, simple preparation, and cheap raw materials

Active Publication Date: 2017-10-17
海南省环境科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still some problems in the above preparation methods, such as high preparation cost, low yield or easy particle agglomeration, etc.

Method used

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  • Environment-friendly nano material for automobile tail gas nitric oxide catalysis purification and preparation method of environment-friendly nano material
  • Environment-friendly nano material for automobile tail gas nitric oxide catalysis purification and preparation method of environment-friendly nano material
  • Environment-friendly nano material for automobile tail gas nitric oxide catalysis purification and preparation method of environment-friendly nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: environmental protection nano material γ-Fe 2 o 3 Preparation of:

[0023] (1) Wipe the surface of the iron wire (0.5 mm in diameter, 4.5 grams in mass) with emery paper and alcohol cotton to remove oxides on the surface and make the surface smooth and clean;

[0024] (2) Put the iron wire (cut into 2cm long pieces) into 80mL mixed solution, the mixed solution is composed of 5mL absolute ethanol and 44.8g KOH, and the rest is deionized water;

[0025] (3) Put the iron wire and the mixed solution together into a polytetrafluoroethylene-lined reactor, and react at 270°C for 36 hours;

[0026] (4) Take out the reaction kettle and cool it to room temperature, then ultrasonicate the reaction system for 9 hours, then filter the ultrasonic product to remove unreacted iron wire; the particles obtained by filtering are soaked and stirred in an ammonia solution with a mass fraction of 10% After 2 hours, soak and stir in 5% hydrochloric acid aqueous solution for 1...

Embodiment 2

[0030] Embodiment 2: environmental protection nano material γ-Fe 2 o 3 Preparation of:

[0031] (1) Wipe the surface of the iron wire (2.8 mm in diameter, 5 grams in mass) with emery paper and alcohol cotton to remove oxides on the surface and make the surface smooth and clean;

[0032] (2) Put the iron wire (cut into 2cm long pieces) into 80mL mixed solution, the mixed solution is composed of 10mL absolute ethanol and 44.8g KOH, and the rest is deionized water;

[0033] (3) Put the iron wire and the mixed solution together into a polytetrafluoroethylene-lined reaction kettle, and react at 270°C for 24 hours;

[0034] (4) Take out the reaction kettle and cool it to room temperature, then ultrasonicate the reaction system for 10 hours, then filter the ultrasonic product to remove the unreacted iron wire; the particles obtained by filtering are soaked and stirred in an ammonia solution with a mass fraction of 10% After 2 hours, soak and stir in 4% hydrochloric acid aqueous so...

Embodiment 3

[0038] Embodiment 3: environmental protection nano material γ-Fe 2 o 3 Preparation of:

[0039] (1) Wipe the surface of the iron wire (0.5 mm in diameter, 6 grams in quality) with emery paper and alcohol cotton to remove oxides on the surface and make the surface smooth and clean;

[0040] (2) Put the iron wire (cut into 2cm long pieces) into 80mL mixed solution, the mixed solution is composed of 5mL absolute ethanol and 44.8g KOH, and the rest is deionized water;

[0041] (3) Put the iron wire and the mixed solution together into a polytetrafluoroethylene-lined reaction kettle, and react at 280°C for 36 hours;

[0042] (4) Take out the reaction kettle and cool it to room temperature, then ultrasonicate the reaction system for 15 hours, then filter the ultrasonic product to remove the unreacted iron wire; the particles obtained by filtering are soaked and stirred in an ammonia solution with a mass fraction of 15% After 2 hours, soak and stir in 5% hydrochloric acid aqueous ...

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Abstract

The invention discloses an environment-friendly nano material gamma-Fe2O3 for automobile tail gas nitric oxide catalysis purification and a preparation method of the environment-friendly nano material, and belongs to the technical field of environment-friendly purification material preparation. The environment-friendly nano material comprises gamma-phase Fe2O3 particles, and the sizes of the particles are within 23-228 nm. The preparation method comprises the following steps: by taking iron wires which are smooth and clean in surface as a raw material, putting the iron wires into 80 mL of a mixed solution, wherein the mixed solution comprises 5-15 mL of absolute ethyl alcohol, 33.6g-44.8g of KOH and the balance of deionized water; performing hydrothermal reaction for 24-48 hours at 270-290 DEG C, further performing ultrasonic treatment for 9-20 hours, filtering, soaking and stirring for 2-5 hours in a 10-25% ammonium hydroxide solution, and further soaking and stirring for 1-6 minutes in a 2-6% hydrochloric acid solution; washing with deionized water, drying, and calcining, thereby obtaining the environment-friendly nano material. The environment-friendly nano material is low in preparation cost, cheap in raw material, green in treatment process, free of complex instrument or equipment, and relatively good in market prospect in automobile tail gas nitric oxide NOx catalysis.

Description

technical field [0001] The invention belongs to the technical field of preparation of environment-friendly purification materials, and in particular relates to an environment-friendly nano-material γ-Fe that can be used for the catalytic purification of nitrogen oxides in automobile exhaust 2 o 3 and its preparation method. Background technique [0002] At present, many nanomaterials have been used in the field of catalytic purification of automobile exhaust, so that NO in exhaust gas x Through catalytic conversion, the emissions are harmless. Nano-iron oxide has a high specific surface area and good weather resistance, and can be used in the fields of catalysts, biomedical materials and magnetic materials. After the iron oxide nanopowder is sintered, its catalytic performance is improved to a certain extent, and it can be used in the field of automobile exhaust gas purification catalyst. [0003] Nano γ-Fe 2 o 3 The preparation methods mainly include vapor deposition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B01D53/94B01J23/745B82Y30/00
CPCB01D53/9409B01J23/745B82Y30/00C01G49/06C01P2002/72C01P2004/62C01P2004/64
Inventor 王兴利吴家欢唐闻雄王晶博刘阳生唐海武李清贵吴晓晨陈表娟符式锦符瞰薛易育陈峻峰颜为军王晨野莫凌黄春张翠萍穆晓东钱益斌王海妹黄薇徐诗琴杨晓姝盛广能梁焱李腾崖姜佳符金州刘贤蒋林林
Owner 海南省环境科学研究院
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