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Three-dimensional order macroporous structural CoOx/Eu0.6 Sr0.4 FeO3 catalyst, preparation method and application thereof

A eu0.6sr0.4feo3, three-dimensional ordered technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve good activity, great application prospects, crystallization good effect

Inactive Publication Date: 2012-03-21
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the current literature has prepared EuFeO 3 method, but so far, there are no literatures and patents at home and abroad that have reported Eu 0.6 Sr 0.4 FeO 3 and CoO x / Eu 0.6 Sr 0.4 FeO 3 The preparation method of and its application in oxidative elimination of toluene

Method used

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  • Three-dimensional order macroporous structural CoOx/Eu0.6 Sr0.4 FeO3 catalyst, preparation method and application thereof
  • Three-dimensional order macroporous structural CoOx/Eu0.6 Sr0.4 FeO3 catalyst, preparation method and application thereof
  • Three-dimensional order macroporous structural CoOx/Eu0.6 Sr0.4 FeO3 catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Under stirring conditions, 0.006mol Eu(NO 3 ) 3 ·6H 2 O, 0.004mol Sr(NO 3 ) 2 and 0.01mol Fe(NO 3 ) 3 9H 2 O was dissolved in a mixed solution made of 4ml of anhydrous methanol and 5ml of deionized water. After it was completely dissolved, 0.02mol of citric acid was added, and the stirring was continued until a uniform metal ion complex solution was formed; 2.0g of PMMA microspheres were weighed as Hard template, slowly poured into the beaker containing the above mixed solution, soaked for 4 hours and then filtered, and dried the obtained sample at room temperature for more than 12 hours; finally, the obtained solid material was placed in a tube furnace, and firstly heated in a nitrogen atmosphere to Raise to 500°C at a rate of 1°C / min and keep the temperature constant for 3 hours, switch to an air atmosphere when it drops to 70°C, then rise to 750°C at a rate of 1°C / min and hold the temperature for 4 hours; the three-dimensional ordered macroporous str...

Embodiment 2

[0019] Example 2: Under stirring conditions, 0.0157g Co(NO 3 ) 2 ·6H 2 O will be dissolved in 1.0mL deionized water, and after stirring evenly, the Eu 0.6 Sr 0.4 FeO 3 Pour into the above cobalt salt solution, shake slightly to make the wetting uniform, then transfer it to a 70°C oven, place the substance obtained after evaporating the solvent in a tube furnace, and raise it to 400°C at a rate of 1°C / min ℃ and constant temperature for 4h; that is, a three-dimensional ordered macroporous structure 3wt% CoO x / Eu 0.6 Sr 0.4 FeO 3 . Under the conditions of toluene concentration of 1000ppm, toluene / oxygen molar ratio of 1 / 400 and space velocity of 20000mL / (g h), the catalytic activity of the sample to toluene oxidation reaction was determined. Its XRD spectrum is shown in figure 1 Curve (b), activity curve see image 3 Curve (b). The resulting three-dimensional ordered macroporous structure 3wt% CoO x / Eu 0.6 Sr 0.4 FeO 3 The catalyst is a single-phase orthorhombic...

Embodiment 3

[0020] Embodiment 3: under stirring condition, 0.0523g Co(NO 3 ) 2 ·6H 2 O will be dissolved in 1.0mL deionized water, and after stirring evenly, the Eu 0.6 Sr 0.4 FeO 3 Pour into the above cobalt salt solution, shake slightly to make the wetting uniform, then transfer it to a 70°C oven, place the substance obtained after evaporating the solvent in a tube furnace, and raise it to 400°C at a rate of 1°C / min ℃ and constant temperature for 4h; that is, a three-dimensional ordered macroporous structure 10wt% CoO x / Eu 0.6 Sr 0.4 FeO 3 . Under the conditions of toluene concentration of 1000ppm, toluene / oxygen molar ratio of 1 / 400 and space velocity of 20000mL / (g h), the catalytic activity of the sample to toluene oxidation reaction was determined. Its XRD spectrum is shown in figure 1 Curve (c), activity curve see image 3 Curve (c), the resulting three-dimensional ordered macroporous structure 10wt% CoO x / Eu 0.6 Sr 0.4 FeO 3 The catalyst has a single-phase orthorho...

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Abstract

A three-dimensional order macroporous structural CoOx / Eu0.6 Sr0.4 FeO3 catalyst, a preparation method and application thereof belong to the field of porous functional material synthesis and heterogeneous catalysis. The preparation method includes steps of preparing Eu0.6 Sr0.4 FeO3 in three-dimensional order macroporous structure at first, and then preparing a CoOx / Eu0.6 Sr0.4 FeO3 catalyst with high-dispersed cobalt oxide by the isometric impregnation process while utilizing the Eu0.6 Sr0.4 FeO3 catalyst in the three-dimensional order macroporous structure as a carrier and utilizing cobaltous nitrate as a cobalt source. The Eu0.6 Sr0.4 FeO3 and the CoOx / Eu0.6 Sr0.4 FeO3 prepared by the preparation method have excellent catalytic property to p-xylene oxidation reaction, and the CoOx / Eu0.6Sr0.4 FeO3 catalyst in the three-dimensional order macroporous structure has good application prospect in terms of removing volatile organic compounds by means of oxidation.

Description

technical field [0001] The invention relates to a three-dimensional ordered macroporous structure CoO for efficient oxidation of toluene x / Eu 0.6 Sr 0.4 FeO 3 Catalyst, preparation method and application. The catalyst showed excellent catalytic performance for toluene oxidation reaction. The invention belongs to the field of porous functional material synthesis and heterogeneous catalysis. Background technique [0002] Volatile organic compounds (VOC) pollute the atmospheric environment, and catalytic oxidation is one of the most effective means of controlling VOC. Perovskite oxide (ABO 3 ) is a class of compounds that can be isomorphously substituted by heterovalent ions at both the A and B cation positions. Its superior thermal stability, rich structural defects, and B-site transition metal ions with various oxidation states make this type of compound a Ideal VOC oxidation catalyst material. will ABO 3 Making a three-dimensional ordered macroporous (3DOM) materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/10B01D53/86B01D53/72
CPCY02A50/20
Inventor 戴洪兴吉科猛邓积光张磊曹怡佳刘赛吴冰月徐冉
Owner BEIJING UNIV OF TECH
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