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Platinum nano-particles and preparation method thereof

A platinum nanoparticle, potassium chloroplatinite technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of limited ability, small size of platinum nanoparticles, and difficulty in preparing platinum nanoparticles and other problems, to achieve the effect of eliminating energy consumption and broadening the size range

Active Publication Date: 2018-12-11
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the preparation of platinum nanoparticles with dendritic polymers as templates and stabilizers is one of the more effective means, but the size of platinum nanoparticles prepared by this method is small, and it is difficult to prepare platinum nanoparticles with a size similar to that of dendritic polymers. nanoparticles, thus limiting the application to some extent
The main reason limiting the preparation of platinum nanoparticles with a size similar to that of dendrimers is the limited ability of dendrimers to complex platinum precursors
Invention patent CN101875131A reports a method for preparing platinum nanoparticles. This method needs to be carried out at 60-90 degrees Celsius, and the energy consumption is high.

Method used

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  • Platinum nano-particles and preparation method thereof
  • Platinum nano-particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Dissolve 280 mg of tetra-n-octylammonium bromide and 15 mg of four-generation dendritic polyamidoamines containing 12 carbon atom long-chain alkanes at the end in 5 ml of toluene, while dissolving 100 mg of potassium chloroplatinite in 5 ml In water; After the two solutions were mixed and vigorously stirred for 0.5 hours, the layers were statically separated and the upper layer liquid was collected; the upper layer liquid was transferred to the reactor, then reacted under a hydrogen atmosphere for 48 hours, and centrifuged at 12000 rpm for 5 minutes to obtain platinum nanoparticles.

[0023] figure 1 It is a transmission electron micrograph of the platinum nanoparticles prepared in the above example, and the average diameter of the platinum nanoparticles is measured to be 3.1 nanometers. figure 2 The Fourier transform infrared spectrogram of the platinum nanoparticle that above-mentioned embodiment makes, wherein 3432 cm -1 The peak at -NH- vibration peak, 2925cm -1...

example 2

[0025] 22 mg of tetra-n-octylammonium bromide and 30 mg of three-generation dendritic polyamidoamines containing 8 carbon atom long-chain alkanes at the end were dissolved in 5 ml of toluene, while 25 mg of potassium chloroplatinite was dissolved in 5 ml of water ; After mixing the two solutions and vigorously stirring for 2 hours, static layering and collecting the upper liquid; the upper liquid was transferred to the reactor, then reacted under a hydrogen atmosphere for 96 hours, and centrifuged at 10,000 rpm for 10 minutes to obtain platinum nanoparticles.

[0026] The platinum nanoparticles prepared in the above examples were characterized by a transmission electron microscope, and the average diameter of the platinum nanoparticles was obtained to be 2.0 nanometers.

example 3

[0028] Dissolve 528 mg of tetra-n-octylammonium bromide and 30 mg of six-generation dendritic polyamidoamines containing 18 carbon atom long-chain alkanes at the end in 5 ml of toluene, while dissolving 500 mg of potassium chloroplatinite in 5 ml In water; After mixing the two solutions and vigorously stirring for 1 hour, the layers were statically separated and the upper layer liquid was collected; the upper layer liquid was transferred to the reactor, then reacted under a hydrogen atmosphere for 72 hours, and centrifuged at 5000 rpm for 30 minutes to obtain platinum nanoparticles.

[0029] The platinum nanoparticles prepared in the above examples were characterized by a transmission electron microscope, and the average diameter of the platinum nanoparticles was 6.0 nanometers.

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Abstract

The invention discloses platinum nano-particles and a preparation method thereof. The preparation method comprises the following steps: 1) mixing a methylbenzene solution dissolved with tetraoctyl ammonium bromide and a dendritic polymer with an aqueous solution dissolved with potassium chloroplatinite, after violently stirring for 0.5-2 hours at a room temperature, standing for layering and collecting supernatant liquid; and 2) transferring the supernatant liquid into a reactor, and then reacting for 48-95 hours in a hydrogen atmosphere to obtain the platinum nano-particles which are centrifugally separated and collected. According to the preparation method of the platinum nano-particles, hydrogen which is low in price and is easily obtained is taken as a reducing agent, reaction is carried out at the room temperature, and energy consumption caused by heating and the like is avoided. In addition, the sizes of the prepared platinum nano-particles are close to the size of the dendriticpolymer, the sizes of the platinum nano-particles are controllable in a certain range, and thus, the size range of the platinum nano-particles which are prepared by taking the dendritic polymer as a template is expanded.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a method for preparing platinum nanoparticles. Background technique [0002] Transition metal nanoparticles have high specific surface area and some special properties, so they are widely used in catalysis, optoelectronics, energy and other fields. For example, platinum nanoparticles, gold nanoparticles, palladium nanoparticles, etc. can be used as catalysts for oxidation reactions and hydrogenation reactions. The preparation of platinum nanoparticles with uniform size distribution and easy control is not only conducive to regulating the performance of platinum nanoparticles, but also beneficial to meet the consistency of performance of different batches of products in production applications. [0003] Generally speaking, in the preparation of platinum nanoparticles, ligands containing amino groups, mercapto groups, and phosphino groups need to be selected as stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/26B22F1/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/26B22F1/054
Inventor 陈天有程朝易昌凤徐祖顺
Owner HUBEI UNIV
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