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Perovskite nanoparticle catalyst and preparation method and application thereof

A nanoparticle and catalyst technology, which is applied in the field of perovskite nanoparticle catalyst and its preparation, can solve the problems of precursor limitation, lack of understanding of the formation mechanism of perovskite material crystal structure, etc., and achieve the maintenance of lattice structure and repeatable preparation , The effect of shortening the heat treatment time

Active Publication Date: 2021-03-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still no unified and widely applicable design route for the preparation of perovskite materials by flame synthesis. The formation mechanism of the crystal structure is still poorly understood

Method used

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  • Perovskite nanoparticle catalyst and preparation method and application thereof
  • Perovskite nanoparticle catalyst and preparation method and application thereof
  • Perovskite nanoparticle catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. Add 3.11 g of strontium acetate to 50 mL of acetic acid solution, stir vigorously for 5 minutes, and perform ultrasonic treatment for 10 minutes, then continue stirring until the solid strontium acetate is completely dissolved in the acetic acid solution to form a clear and transparent solution.

[0048] 2. Add the molecular sieve into the acetic acid solution to remove the water in the solution, and after standing for 10 minutes, the molecular sieve can be filtered out.

[0049] 3. Dissolve 4.59g of n-butyl titanate in 50mL of ethanol and stir, then add 0.518g of metal precursor of cobalt 2-ethylhexanoate, and stir vigorously.

[0050] 4. The precursor solution obtained by mixing the acetic acid solution and the ethanol solution was vigorously stirred until the precursor solution was uniform and clear, and the concentration of the solution was 0.15 mol / L.

[0051] 5. Atomize the prepared precursor solution through the injection pump jet flow, and keep the feed flow ...

Embodiment 2

[0054] 1. Add 3.11 g of strontium acetate to 50 mL of acetic acid solution, stir vigorously for 5 minutes, and perform ultrasonic treatment for 10 minutes, then continue stirring until the solid strontium acetate is completely dissolved in the acetic acid solution to form a clear and transparent solution.

[0055] 2. Add the molecular sieve into the acetic acid solution to remove the water in the solution, and after standing for 10 minutes, the molecular sieve can be filtered out.

[0056] 3. Dissolve 4.59 g of n-butyl titanate in 50 mL of ethanol and stir, then add 0.747 g of metal precursor of iron naphtenate and stir vigorously.

[0057] 4. The precursor solution obtained by mixing the acetic acid solution and the ethanol solution was vigorously stirred until the precursor solution was uniform and clear, and the concentration of the solution was 0.15 mol / L.

[0058] 5. Atomize the prepared precursor solution through the injection pump jet flow, and keep the feed flow rate o...

Embodiment 3

[0061] 1. Add 3.11 g of strontium acetate to 50 mL of acetic acid solution, stir vigorously for 5 minutes, and perform ultrasonic treatment for 10 minutes, then continue stirring until the solid strontium acetate is completely dissolved in the acetic acid solution to form a clear and transparent solution.

[0062] 2. Add the molecular sieve into the acetic acid solution to remove the water in the solution, and after standing for 10 minutes, the molecular sieve can be filtered out.

[0063] 3. 4.59 g of n-butyl titanate was dissolved in 50 mL of ethanol and stirred, then 1.280 g of metal precursor of manganese 2-ethylhexanoate was added and vigorously stirred.

[0064] 4. The precursor solution obtained by mixing the acetic acid solution and the ethanol solution was vigorously stirred until the precursor solution was uniform and clear, and the concentration of the solution was 0.15 mol / L.

[0065] 5. Atomize the prepared precursor solution through the injection pump jet flow, a...

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Abstract

The invention discloses a perovskite nanoparticle catalyst and a preparation method and application thereof, and belongs to the field of nano material synthesis. The perovskite nano particles are Sr1-yAyTi1-xBxO3; and the preparation method of the perovskite nanoparticles adopts a flame spray pyrolysis technology, and comprises the following main preparation steps: sequentially mixing a metal precursor and a liquid fuel, and carrying out ultrasonic treatment to uniformly mix the metal precursor and the liquid fuel to obtain a precursor solution; introducing the precursor solution into a flamespray pyrolysis device, igniting the precursor solution by ignition flame after the precursor solution is atomized, then combusting liquid fuel to form high-temperature flame, and pyrolyzing the precursor in the high-temperature flame to obtain the perovskite catalyst. According to the invention, the perovskite catalyst can be rapidly synthesized in one step by adjusting the type and preparation method of the precursor; the precursor is wide in range and can be flexibly combined; and the synthesized perovskite nanoparticles have good thermal stability, and obtain extremely high catalytic activity in the catalytic fields of photocatalysis, catalytic combustion and the like.

Description

technical field [0001] The invention belongs to the field of nanomaterial synthesis, and more specifically relates to a perovskite nanoparticle catalyst and its preparation method and application. Background technique [0002] Since the stability of supported metal oxide catalysts often depends on the properties of the support, the stable lattice structure of the perovskite oxide material itself has excellent thermal stability, and its special redox characteristics make it directly applicable to Catalytic oxidation reaction. Perovskite metal oxide refers to the structural formula of ABO 3 The metal oxides, where the A site and the B site are metal cations. Nowadays, the commonly used A-site elements are mainly rare earth elements, such as La, Sr, Ce, etc. The B-site elements are mainly transition metal elements, such as Ti, Mn, Co, Fe, Ni, Mg, etc. LaCoO 3 , LaMnO 3 , SrTiO 3 etc. are common perovskite structure materials. Therefore, the ion doping substitution in th...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/34C01G23/00C01G51/00C01G49/00C01G45/12B82Y40/00
CPCB01J23/78B01J23/34B01J23/002C01G23/006C01G51/66C01G49/009C01G45/125B82Y40/00B01J2523/00C01P2002/34B01J35/39B01J35/33B01J2523/24B01J2523/47B01J2523/845B01J2523/842B01J2523/72
Inventor 赵海波袁兴徐祖伟
Owner HUAZHONG UNIV OF SCI & TECH
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