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Carbon nano-tube microparticle supported palladium nano particle as well as preparation method and application thereof

A technology of carbon nanotubes and multi-walled carbon nanotubes, applied in organic chemical methods, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve difficult problems and achieve large pore capacity, The effect of high structural stability and good catalytic effect

Inactive Publication Date: 2009-05-20
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the controllable preparation of monodisperse ultrafine palladium metal nanoparticles is difficult due to the agglomeration effect of metal nanoparticles.

Method used

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  • Carbon nano-tube microparticle supported palladium nano particle as well as preparation method and application thereof
  • Carbon nano-tube microparticle supported palladium nano particle as well as preparation method and application thereof
  • Carbon nano-tube microparticle supported palladium nano particle as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 5 mg of carbon nanotubes and 402 mg of sodium lauryl sulfate with a purity of not less than 99% to 20 ml of ethylene glycol, heat and stir for 30 minutes, then sonicate for 1 hour, and add 55 microliters of sodium chloropalladate aqueous solution dropwise (the concentration of sodium chloropalladate is 0.1 mol / liter), heated and stirred at 110°C for 3 hours. Take it out and let it stand for a period of time until solid precipitates appear, centrifuge at 4000 rpm for 10-15 minutes, then wash the sample with distilled water and ethanol, repeat 3-5 times. Finally, the prepared sample was vacuum-dried for more than 10 hours at 50-70° C. to obtain black carbon nanotube particles loaded with palladium nanoparticles, such as figure 2 shown. Take a small amount of dried sample and redisperse it in ethanol, ultrasonically disperse for 5 minutes under the ultrasonic conditions of 120W, 40KHz, spot the sample on the copper grid for transmission electron microscope, and then ...

Embodiment 2

[0031] Weigh 5 mg of carbon nanotube particles, add dropwise 60 microliters of sodium chloropalladate aqueous solution, and other conditions are the same as in Example 1, to obtain carbon nanotube particles loaded with palladium nanoparticles. Transmission electron micrographs show that the average particle size of the palladium nanoparticles is 3 nm.

Embodiment 3

[0033] Weigh 5 mg of carbon nanotube particles, add 500 mg of sodium lauryl sulfate, and other conditions are the same as in Example 1, to prepare carbon nanotube particles loaded with palladium nanoparticles. The average particle diameter of the palladium nanoparticles is 3 nm.

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Abstract

The invention relates to carbon nano-tube particles for supporting palladium nano-particles, a preparation method thereof, and application of the carbon nano-tube particles (as a catalyst) for supporting the palladium nano-particles in a Suzuki cross-coupling reaction. Sodium chloropalladate, multi-walled carbon nanotube particles, sodium dodecyl sulfate and glycol are taken as reactants, and are stirred to react at a temperature of between 110 and 140 DEG C to obtain the carbon nano-tube particles with the palladium nano-particles supported on the surfaces of multi-walled carbon nanotubes, and the carbon nanotube particles are assembled and formed by numerous multi-walled carbon nanotubes which are entangled with one another. The carbon nano-tube particles for supporting the palladium nano-particles have rich mesopores as well as larger specific surface area and pore volume, and supported palladium has the characteristics of small grain diameter, even distribution and so on, thereby having excellent catalytic effect. The carbon nano-tube particles for supporting the palladium nano-particles also have good structural stability, are easy to separate from organic media, and can be taken as the catalyst for the Suzuki cross-coupling reaction.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a carbon nanotube particle loaded with palladium nanoparticles and a preparation method thereof, and the application of the carbon nanotube particle loaded with palladium nanoparticle as a catalyst in Suzuki cross-coupling reaction. Background technique [0002] As a noble metal, palladium has a wide range of applications in the fields of chemistry and chemical catalysis. However, the controllable preparation of monodisperse ultrafine palladium metal nanoparticles is difficult due to the agglomeration effect of metal nanoparticles. Therefore, the general treatment method is to load it on a certain carrier, such as Srividhya Kidambi, Jinhua Dai, Jin Li, and Merlin L. Bruening, J.Am.Chem.Soc.2004, 126, 2658, and Yijun Jiang and Introduced by Qiuming Gao J.Am.Chem.Soc.2006, 128, 716. Carbon nanotubes are likely to be widely used as catalyst supports due to their h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J21/18C07B37/00
Inventor 贺军辉陈学成侯玉清
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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