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Preparation of magnetic nano Cu-Fe3O4/grapheme composite catalyst and application of composite catalyst in reduction of nitro-compounds

A graphene composite, cu-fe3o4 technology, which is applied in the preparation of amino compounds, organic compounds, amino hydroxyl compounds, etc., can solve the problems of complex process, restriction of industrial production, and many steps, and achieve simple method and recycling Convenience and the effect of improving catalytic activity

Active Publication Date: 2013-02-13
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of method to prepare metal nanoparticles-Fe 3 o 4 There are many steps and complicated process of graphene composite materials, which limits its industrial production to a certain extent

Method used

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  • Preparation of magnetic nano Cu-Fe3O4/grapheme composite catalyst and application of composite catalyst in reduction of nitro-compounds
  • Preparation of magnetic nano Cu-Fe3O4/grapheme composite catalyst and application of composite catalyst in reduction of nitro-compounds
  • Preparation of magnetic nano Cu-Fe3O4/grapheme composite catalyst and application of composite catalyst in reduction of nitro-compounds

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: The present invention one-step solvothermal method prepares magnetic nanometer Cu-Fe 3 o 4 / graphene composite catalyst, comprises the following steps:

[0030] (1) Put 30mg of graphite oxide in 60mL of ethanol and ultrasonically disperse for 45min;

[0031] (2) Weigh 0.3025g of ferrous sulfate and ultrasonically dissolve it in 5mL of water, sonicate for 15min, add dropwise to step (1), and stir for 30min;

[0032] (3) Ultrasonic dissolve 0.9060g of copper nitrate in water, add sodium hydroxide solution to adjust the pH to 10~11, filter and wash to obtain a solid product, put it in ethanol for ultrasonic dispersion for 60min, and then add dropwise to the mixture of (2) Stir evenly, then add dropwise sodium hydroxide solution to adjust the pH to 10~11, stir evenly, place in a hydrothermal kettle, 200°C, and react for 10h;

[0033] (4) The product of step (3) is subjected to magnetic separation, and the solid product is separated, washed with deionized wa...

Embodiment 2

[0036] Embodiment 2: The present invention one-step solvothermal method prepares magnetic nanometer Cu-Fe 3 o 4 / graphene composite catalyst, comprises the following steps:

[0037] (1) Put 30mg of graphite oxide in 60mL of ethanol and ultrasonically disperse for 45min;

[0038] (2) Weigh 0.3528g of ferrous sulfate and ultrasonically dissolve it in 5mL of water, sonicate for 15min, add dropwise to (1), and stir for 30min;

[0039] (3) Ultrasonic dissolve 0.7520g of copper nitrate in water, add sodium hydroxide solution to adjust the pH to 10~11, filter and wash to obtain a solid product, place it in ethanol for ultrasonic dispersion for 60min, and then add dropwise to the mixture of (2) Stir evenly in the middle, then add dropwise sodium hydroxide solution to adjust the pH to 10~11, stir evenly, place in a hydrothermal kettle, 120°C, react for 24h;

[0040] (4) The product of step (3) is subjected to magnetic separation, and the solid product is separated, washed with deion...

Embodiment 3

[0041] Embodiment 3: The present invention one-step solvothermal method prepares magnetic nanometer Cu-Fe 3 o 4 / graphene composite catalyst, comprises the following steps:

[0042] (1) Place 30mg of graphite oxide in 60mL of ethylene glycol for ultrasonic dispersion for 45min;

[0043] (2) Weigh 0.1895g of ferrous chloride and ultrasonically dissolve it in 5mL of water, sonicate for 15min, add dropwise to (1), and stir for 30min;

[0044] (3) Dissolve 0.3021g of copper nitrate in water ultrasonically, add sodium hydroxide solution to adjust the pH to 10~11, filter and wash to obtain a solid product, place it in ethylene glycol for ultrasonic dispersion for 60min, and then add it dropwise to (2) Stir in the mixture evenly, then add dropwise sodium hydroxide solution to adjust the pH to 10~11, stir evenly, place in a hydrothermal kettle, 120°C, and react for 15h;

[0045] (4) The product of step (3) is subjected to magnetic separation, and the solid product is separated, was...

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Abstract

The invention relates to a magnetic nano Cu-Fe3O4 / grapheme composite catalyst and application of the composite catalyst in reduction of nitro-compounds. The preparation method comprises the steps of (1) placing graphite oxide into a water soluble alcohol for ultrasonic dispersion; (2) dissolving ferrous salts in water in an ultrasonic mode, then dropwise adding into a solution of Step (1), and mixing uniformly; and (3) dissolving copper salts in water in an ultrasonic mode, adding a sodium hydroxide solution to adjust the pH to be in a range of 10-11, conducting suction filtration and washing to obtain solid products, placing in the water soluble alcohol for ultrasonic dispersion, dripping into a mixing solution of Step (2), mixing uniformly, dropwise adding the sodium hydroxide solution to adjust the pH to be in a range of 10-11, mixing uniformly, and then transferring a mixture system into a hydrothermal still for reaction to obtain the magnetic nano Cu-Fe3O4 / grapheme composite catalyst. The preparation method is few in step and simple in process, the prepared composite catalyst can be effectively separated in an applied magnetic field, the problem that the nano catalyst is difficult to recover is solved, and simultaneously, the catalyst has the high catalytic activity in terms of reduction of nitro-compounds.

Description

technical field [0001] The invention belongs to the field of magnetic catalysts, in particular to a magnetic nano Cu-Fe 3 o 4 / graphene composite catalyst and its application in the reduction of nitro compounds. Background technique [0002] Nanocatalysts have attracted much attention due to their large specific surface area, large number of surface active centers and unique catalytic properties. However, the particle size of nanocatalysts is small, and it is difficult to separate them from the reaction system through traditional centrifugation and filtration methods, which makes the recovery of nanocatalysts an engineering difficulty, which greatly limits its application. In recent years, the rapid development of magnetically separable nanocatalysts (combination of magnetic substances and active components) has enabled nanocatalysts to be separated under an external magnetic field, and the recovery is easy, and the magnetic nanocatalysts have both high activity and easy s...

Claims

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Application Information

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IPC IPC(8): B01J23/745C07C215/76C07C213/02C07C211/51C07C209/36C07C211/52C07C211/47
Inventor 何光裕刘伟锋陈海群朱俊武孟启陈群汪信
Owner HUAWEI TEHCHNOLOGIES CO LTD
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