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A kind of preparation method of carbon nanotube supported nano particle catalyst

A carbon nanotube and nanoparticle technology, which is applied in the field of catalysts for catalytic hydrogenation, can solve the problems of destroying the thermal conductivity and strength of carbon nanotubes, difficulty in operation, and high danger, and achieves simple and convenient operation, high catalytic activity, and stability. good effect

Active Publication Date: 2018-09-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects of complex process, difficult operation and high risk in the process of using strong acid to prepare carbon nanotube-loaded nanoparticle catalysts in the traditional technology, and at the same time destroying the thermal conductivity and strength of carbon nanotubes themselves, the present invention provides an operation Method for preparing carbon nanotube-loaded nanoparticle catalysts with convenience and mild reaction conditions

Method used

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  • A kind of preparation method of carbon nanotube supported nano particle catalyst
  • A kind of preparation method of carbon nanotube supported nano particle catalyst

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Embodiment 1

[0036] This embodiment relates to a method for preparing a carbon nanotube-supported nanoparticle catalyst, comprising the following steps:

[0037] 1) The metal precursor PdCl 2 , the reducing agent sodium citrate and carbon nanotubes are dissolved in water according to the mass volume ratio of 50~300g / L, 20~200g / L, 1~20g / L, and the mixed solution is magnetically stirred for 4h to make the three The substances are evenly mixed;

[0038] 2) Microwave the mixed solution at a temperature of 120° C., a pressure of 500 psi, and a power of 600 W for 0.5 to 5 hours, wash with deionized water and ethanol for 5 times, and vacuum-dry at 80° C. for 24 hours to obtain carbon Nanotube-supported nanoparticle catalysts.

Embodiment 2

[0040] This embodiment relates to a method for preparing a carbon nanotube-supported nanoparticle catalyst, comprising the following steps:

[0041] 1) Dissolve carbon nanotubes in deionized water at a mass concentration of 10 mg / mL, stir magnetically for 3 hours, and sonicate in a water bath for 3 hours to obtain an aqueous solution of carbon nanotubes;

[0042] 2) the metal precursor R hCl 3 Dissolve in deionized water at 5 mg / mL, stir magnetically until uniformly dispersed, and obtain a metal precursor;

[0043] 3) dissolving ascorbic acid in deionized water at a mass-volume ratio of 20 mg / mL, and magnetically stirring until uniformly dispersed to obtain an aqueous solution of ascorbic acid;

[0044] 4) Mix the aqueous solution of carbon nanotubes obtained in step (1), the metal precursor solution obtained in step (2) and the aqueous solution of ascorbic acid obtained in step (3) in proportion, stir magnetically for 3 hours, at a temperature of 80°C, a pressure of 400psi, ...

Embodiment 3

[0048] This embodiment relates to a method for preparing a carbon nanotube-supported nanoparticle catalyst, comprising the following steps:

[0049] (1) dissolving the carbon nanotubes in a deionized aqueous solution at a mass concentration of 10ml / ml, magnetic stirring for 0.5h, and ultrasonication in a water bath for 5h to obtain an aqueous solution of carbon nanotubes;

[0050] (2) the metal precursor RhCl 3 Dissolve in deionized water at a mass concentration of 5 mg / ml, stir magnetically until uniformly dispersed, and obtain a metal precursor;

[0051] (3) Dissolving the reducing agent ascorbic acid in deionized water at a mass concentration of 20 mg / ml, and magnetically stirring until uniformly dispersed to obtain an aqueous solution of ascorbic acid;

[0052] (4) The carbon nanotube aqueous solution obtained in step (1), the metal precursor solution obtained in step (2) and the ascorbic acid aqueous solution obtained in step (3) are mixed in proportion, and magnetically...

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Abstract

The invention relates to a preparation method of a carbon nano tube supported nanometer particle catalyst. The method comprises the steps of: adding a metal precursor, a reducing agent and a carbon nanotube to the water solution, fully mixing, and conducting microwave heating under the high pressure condition. The preparation process of the catalyst provided by the invention is simple, and has mild preparation conditions; the green raw materials are subjected to microwave heating reduction; the whole process has the characteristics of green, environment-friendliness, energy saving, high efficiency, good stability of catalyst, and no oxygen isolation operation; and the prepared catalyst for the first time realizes catalytic hydrogenation reaction at room temperature, and is high in catalytic activity, easy for separation and beneficial for industrial application.

Description

technical field [0001] The invention relates to a catalyst for catalyzing a hydrogenation reaction, in particular to a carbon nanotube-loaded nano particle catalyst. Background technique [0002] Catalysts used in catalytic hydrogenation reactions can generally be classified into homogeneous catalysts and heterogeneous catalysts. Homogeneous catalysts have high catalytic activity and mild reaction conditions, but it is difficult to separate the catalyst, which increases the cost and the residual catalyst will cause product degradation. Heterogeneous catalysts (supported catalysts) effectively solve the separation problem of catalysts, and thus have been widely used in industry. High reaction temperature, especially in the field of polymer hydrogenation, the use of supported catalysts requires high temperature. This increases the cost in actual industrial production. [0003] As a new type of carbon material, carbon nanotubes have the advantages of high aspect ratio, high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J23/46C08C19/02
Inventor 岳冬梅邹锐李翠张立群
Owner BEIJING UNIV OF CHEM TECH
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