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Preparation method of platinum nanoparticle loaded graphene

A technology of platinum nanoparticles and graphene, applied in the field of preparation of platinum nanoparticles supported on graphene, to achieve high density and simple reaction process

Inactive Publication Date: 2011-07-13
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Neither of these approaches involves carrying out surface self-assembly modification loads

Method used

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  • Preparation method of platinum nanoparticle loaded graphene
  • Preparation method of platinum nanoparticle loaded graphene
  • Preparation method of platinum nanoparticle loaded graphene

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Embodiment Construction

[0023] A typical procedure for preparing a composite of high-density supported platinum nanoparticles on chemically reduced graphene is as follows:

[0024] (1) Hydrazine chemical reduction of graphite oxide: hydrazine was used to reduce graphite oxide prepared by the Hummers method at 95° C., reacted for one hour, washed and freeze-dried to obtain reduced graphene.

[0025] (2) A layer of 1-pyrenemethylamine is self-assembled on the surface of graphene, and 1-pyrenemethylamine utilizes the interaction of π-π to form a self-assembled film on the surface of graphene: 8 mg of reduced graphene is ultrasonically dispersed in 80 ml of ethyl alcohol Diol solution, add 12ml concentration of 10 -3 The ethylene glycol solution of 1-pyrenemethylamine of M was stirred for 30 minutes (just enough at room temperature). Self-assembly of 1-pyrenemethylamine onto graphene surfaces

[0026] (3) Ethylene glycol reduces chloroplatinic acid at a pH of 8-9 at 160° C. to prepare platinum nanopart...

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Abstract

The invention relates to a preparation method of platinum nanoparticle loaded graphene, comprising the following steps: (1), ultrasonically disperse restored graphene in a glycol solution, and adding the glycol solution of 1-pyrene methylamine, wherein the ratio (mg: ml: ml) of the graphene to the glycol to the glycol solution of the 1-pyrene methylamine is 1: (8-20): (1-1.5), and the concentration of the glycol solution of the 1-pyrene methylamine is 10<-3> M; stirring for 20-120 minutes to assemble the 1-pyrene methylamine on the surface of the graphene; and (2), adding Nml of a 0.048M chloroplatinic acid glycol solution, wherein the ratio (mg: ml) of the graphene to the Nml is 1: (0.8-1.5); adjusting the pH value of the glycol solution in the step (1) to be 8-9 with 0.1 M sodium hydroxide, continuing to stir, reacting for 2 hours in the oil bath at the temperature of 160 DEG C to obtain the high-density platinum nanoparticle loaded graphene, and cleaning and performing freeze-drying.

Description

Technical field: [0001] The invention is a preparation method for high-density loading of platinum nanoparticles on graphene. technical background: [0002] Graphene has received extensive attention since it was discovered by Novoselov et al. in 2004. This two-dimensional material has ultra-high electron mobility at room temperature[1], high mechanical strength[2], high specific surface area and good thermal stability[3], making it an ideal material for nanoelectronic devices. , sensor materials, battery materials, catalytic materials [4] and other fields have broad application prospects. Recently, the use of graphene as a carrier of catalytic materials has attracted more and more attention, and published work has proved that this platinum / graphene composite material has good catalytic performance [5, 6] and can be well applied in methanol fuel cells. However, because of the inertness and smoothness of the graphene surface, it is very difficult to directly obtain platinum...

Claims

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Application Information

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IPC IPC(8): B01J31/28H01M4/92G01N21/65
CPCY02E60/50
Inventor 李文博翟东媛潘力佳邱浩庞欢施毅
Owner NANJING UNIV
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