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Single crystal Ag nanoplate/Co3O4/Eu0.6Sr0.4FeO3 composite catalyst, preparation thereof and application thereof

A eu0.6sr0.4feo3, composite catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, incinerator, etc.

Inactive Publication Date: 2012-10-17
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many reports on the preparation methods of three-dimensional ordered macroporous catalysts for heterogeneous catalytic oxidation, so far, there are no literatures and patents at home and abroad that have reported single-crystal Ag nanostructures with three-dimensional ordered macroporous structures. Sheet / Co 3 o 4 / Eu 0.6 Sr 0.4 FeO 3 Catalyst, its preparation method and its application in oxidative elimination of VOCs

Method used

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  • Single crystal Ag nanoplate/Co3O4/Eu0.6Sr0.4FeO3 composite catalyst, preparation thereof and application thereof
  • Single crystal Ag nanoplate/Co3O4/Eu0.6Sr0.4FeO3 composite catalyst, preparation thereof and application thereof
  • Single crystal Ag nanoplate/Co3O4/Eu0.6Sr0.4FeO3 composite catalyst, preparation thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: 1. 0.0068g silver nitrate (AgNO 3 ), 0.1261g citric acid and 0.8120g polyvinylpyrrolidone (PVP, calculated as 29000 molecular weight) were successively dissolved in 80mL deionized water, and after fully dissolved, the solution was fixed to 100mL; ② Weigh 0.0227g NaBH 4 Dissolve in 10mL deionized water; ③Take 25mL of the diluted silver nitrate solution prepared in ①, and add the prepared three-dimensional ordered macroporous structure supported catalyst Co 3 o 4 / Eu 0.6 Sr 0.4 FeO 3 0.20g, shake and disperse for 3min, then add 1.0mL NaBH prepared in ② 4 solution, and quickly transferred to a rotary evaporator and rotated and stirred for 60min. After the reaction was completed, it was slowly filtered, washed with 5.0ml deionized water, and dried at room temperature to obtain a composite catalyst Co 3 o 4 / Eu 0.6 Sr 0.4 FeO 3 . Among them, the shape and size of the single crystal Ag nanosheets are irregular, and the silver flakes with smaller diamet...

Embodiment 2

[0015] Example 2: Steps ① and ② are the same as in Example 2; ③ Take 25 mL of the diluted silver nitrate solution prepared in ①, add 0.25 mL of hydrogen peroxide with a mass fraction of 30%, mix well and add the prepared three-dimensional ordered macroporous structure The supported catalyst Co 3 o 4 / Eu 0.6 Sr 0.4 FeO 3 0.20g, continue to shake and disperse for 3min, then add 1.0mL of NaBH prepared in ② 4 solution, and quickly transferred to a rotary evaporator to rotate and stir for 30min. After the reaction was completed, it was slowly filtered, washed with 5.0ml deionized water, and dried at room temperature to obtain a composite catalyst Co 3 o 4 / Eu 0.6 Sr 0.4 FeO 3 . Among them, the single crystal Ag nanosheets are irregular in shape and non-uniform in size, and are mainly distributed between the carriers, showing an obvious diffraction pattern of Ag single crystal. When the toluene conversion is less than 20%, the catalyst increases the toluene conversion by a...

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Abstract

The invention relates to a single crystal Ag nanoplate / Co3O4 / Eu0.6Sr0.4FeO3 composite catalyst, a preparation thereof and an application thereof, which belongs to the composite catalyst technical field. The single crystal Ag nanoplate / Co3O4 / Eu0.6Sr0.4FeO3 composite catalyst is loaded on the pore channel and the surface of Co3O4 / Eu0.6Sr0.4FeO3; 4mmol / L of AgNO3 solution and 6.0mmol / L NaBH4 solution are prepared according to the mol ratio of 1: 15: 0.7 of AgNO3, citric acid to PVP; 3DOM Co3O4 / Eu0.6S r0.4FeO3 is dipped in the AgNO3 solution, a NaBH4 solution is added according the mol ratio of 1: 6 of AgNO3 to NaBH4, and then the mixture is rapidly transferred to a rotary evaporation instrument when the concussion is carried out, and rotated and stirred at the room temperature for 60 minutes, filtered, washed, and dried at the room temperature to obtain the catalyst. The loaded sample presents more excellent catalytic performance on a toluene oxidation reaction at a low conversion rate phase.

Description

technical field [0001] The invention relates to a supported composite catalyst single crystal Ag nanosheet / Co with a three-dimensional ordered macroporous structure 3 o 4 / Eu 0.6 Sr 0.4 FeO 3 , the preparation method of silver sol collagen situ loading of the catalyst, and its application in catalytic combustion to eliminate volatile organic pollutants (VOCs), belong to the technical field of composite catalysts. Background technique [0002] Three-dimensional ordered macroporous structure (3DOM) perovskite oxide material (ABO 3 ) Because of its large specific surface area, developed pore structure, high stability, designability of chemical composition and good magnetoelectric properties, it has great application potential in many fields, especially in heterogeneous catalysis Its preparation method and catalytic performance have been widely studied in the field. It is mainly prepared by the nano-replication method with a colloidal crystal template with a three-dimension...

Claims

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Application Information

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IPC IPC(8): B01J23/89F23G7/07
Inventor 戴洪兴吉科猛邓积光王媛谢少华李欣尉
Owner BEIJING UNIV OF TECH
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