Method for preparing carbon nanometer tube loaded type catalyst

A supported catalyst and carbon nanotube technology are used in the preparation of metal-supported magnetic catalysts using magnetic carbon nanotubes as carriers, and in the field of preparation of carbon nanotube-supported catalysts, which can solve the difficulty of catalyst separation, the loss of carriers and active components , time-consuming and labor-intensive problems, to achieve the effects of efficient separation and recycling, excellent catalytic performance, and simple preparation process

Inactive Publication Date: 2011-08-17
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the disadvantages of the existing carbon nanotube catalyst preparation methods, such as labor-intensive and time-consuming, easy to cause loss of carrier and

Method used

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  • Method for preparing carbon nanometer tube loaded type catalyst
  • Method for preparing carbon nanometer tube loaded type catalyst
  • Method for preparing carbon nanometer tube loaded type catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 3.0 g of carbon nanotubes, add 250 ml of concentrated nitric acid, stir at room temperature for 24 h, then wash with deionized water until the pH of the solution is neutral, dry at 70° C. for 12 h, and grind for later use.

[0026] Weigh 1.0g of pretreated carbon nanotubes, add 60ml of triethylene glycol, ultrasonicate for 5min, then add 1.0g of Fe(acac) 3 , continue to sonicate for 10min, pass nitrogen protection, heat until the solution boils, reflux for 0.5h, cool to room temperature, wash with ethanol until colorless, and blow dry overnight at 80°C to obtain Fe 3 o 4 / MCNT magnetic carrier.

[0027] Weigh Pd(acac) 2 0.0150g, 0.03820g of 1,2-hexadecanediol, add 20ml of dioctyl ether, pass through nitrogen protection and heat to 100°C, add 0.5g of Fe 3 o 4 / MCNT magnetic carrier, continue to heat to boiling, reflux for 0.5h, cool to room temperature, close the protective gas and carry out suction filtration, wash with absolute ethanol until colorless, and bl...

Embodiment 2

[0029] Weigh 3.0 g of carbon nanotubes, add 250 ml of concentrated nitric acid, stir at room temperature for 24 hours, then wash with deionized water until the pH of the solution is neutral, dry at 100°C overnight, and grind for later use.

[0030] Weigh 1.0 g of the pretreated carbon nanotubes, add 60 ml of triethylene glycol, ultrasonicate for 5 minutes, and then add Fe(acac) 3 1.5g, continue to sonicate for 10min, feed nitrogen, heat until the solution boils, reflux for 0.5h, cool to room temperature, wash with ethanol until colorless, and dry at 80°C overnight to obtain Fe 3 o 4 / MCNT magnetic carrier.

[0031] Weigh Pd(acac) 2 0.0446g, 0.1135g of 1,2-hexadecanediol, 20ml of dioctyl ether, blowing nitrogen gas, heating to 100°C, adding 0.5g Fe 3 o 4 / MCNT magnetic carrier, continue heating to boiling, reflux for 0.5h, cool to room temperature, turn off the protective gas, filter with suction, wash with absolute ethanol until colorless, and dry at 80°C overnight to obta...

Embodiment 3-5

[0033] The mass ratios of Fe(acac)3 and MCNTs were changed to 2:1, 3:1 and 4:1 respectively, and the pretreatment conditions and catalyst preparation process were the same as in Example 2.

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Abstract

The invention relates to a method for preparing a carbon nanometer tube loaded type catalyst. The preparing method disclosed by the invention comprises the following steps of: (1) functionalizing a carbon nanometer tube; (2) depositing magnetic nanometer particles on the surface of the functionalized carbon nanometer tube to obtain a magnetic carbon nanometer tube; and (3) depositing an active metal element on the surface of the magnetic carbon nanometer tube to obtain a metal loaded type magnetic catalyst. Compared with the conventional preparation method of the carbon nanometer tube catalyst, the preparation method of the carbon nanometer tube loaded type catalyst, disclosed by the invention, has the characteristics of simple preparation process, adjustable particle diameter of the magnetic nanometer particles and the catalyst particles and the like. The catalyst prepared by the method disclosed by the invention has excellent catalytic performance; and efficient separation and recycling of the catalyst and a liquid phase catalyst system can be realized by the control of an external magnetic field, and the production cost and the use cost can be reduced, so that the method has application prospect in the hydrogenation and dehydrogenation reaction.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube-supported catalyst, which belongs to the field of catalyst preparation, in particular to a method for preparing a metal-supported magnetic catalyst with magnetic carbon nanotubes as a carrier. Background technique [0002] Since it was discovered by Iijima et al. in 1991, carbon nanotubes have widely affected many scientific fields such as chemistry, physics, and materials, and have shown great potential application prospects. In recent years, with the in-depth research on the functionalization of the carbon nanotube wall, coupled with its excellent electronic conductivity, special adsorption and desorption properties for reaction species and reaction products, special pore space stereoselectivity, carbon The strong metal-support interaction with metal catalysts and the specific catalytic and photocatalytic properties of carbon nanotubes due to quantum effects, strong oxidizing and reduc...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/75C07C47/228C07C45/62C07C33/20C07C29/141
CPCY02P20/584
Inventor 沈晓旭钟依均徐玲叶素芳肖强叶向荣朱伟东
Owner ZHEJIANG NORMAL UNIVERSITY
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