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A kind of synthetic method of polybranch metal nanocrystal

A technology of metal nanocrystals and synthesis methods, applied in the field of nanomaterials, to achieve the effects of controlling shape and size, good product dispersion, and stable structure

Active Publication Date: 2020-04-10
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, our control over its morphology and structure remains a challenging problem

Method used

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  • A kind of synthetic method of polybranch metal nanocrystal
  • A kind of synthetic method of polybranch metal nanocrystal
  • A kind of synthetic method of polybranch metal nanocrystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In a 25mL flask, weigh 10mg of platinum acetylacetonate, 36.5mg of cetyltrimethylammonium bromide, and 20mg of n-hexadecylformamide, add 5mL of oleylamine, and sonicate for 1 hour to make the mixture in the bottle uniform. Dispersed in solvent. The flask needs to be sealed with Teflon tape. Then put the flask in an oil bath, raise the temperature of the reaction system with the oil, and raise the temperature of the reaction system to 190° C. within 30 minutes, and keep the reaction system at 190° C. for 8 hours.

[0024] After the reaction was completed, the reaction system was naturally cooled to room temperature. Then, a mixture of 8 mL of ethanol and 1 mL of cyclohexane was added to the colloidal product, and centrifuged at a speed of 3000 r / min for 2 min. Then the supernatant was discarded, and the powder of the lower layer was retained, washed three times with 8 mL of ethanol and 1 mL of cyclohexane, and centrifuged at 3000 r / min for 2 min. The finally obtained ...

Embodiment 2

[0027] In a 25mL flask, weigh 10mg of platinum acetylacetonate, 90mg of methyltrioctylammonium bromide, and 20mg of n-hexadecylformamide, add 5mL of oleylamine, and ultrasonicate for 5 minutes to fully dissolve the mixture in the bottle into the solvent. . The flask needs to be sealed with Teflon tape. Then put the flask in an oil bath, raise the temperature of the reaction system with the oil, and raise the temperature of the reaction system to 190° C. within 30 minutes, and keep the reaction system at 190° C. for 10 hours.

[0028] After the reaction was completed, the reaction system was naturally cooled to room temperature. Then, a mixture of 8 mL of ethanol and 1 mL of cyclohexane was added to the colloidal product, and centrifuged at a speed of 3000 r / min for 2 min. Then the supernatant was discarded, and the powder of the lower layer was retained, washed three times with 8 mL of ethanol and 1 mL of cyclohexane, and centrifuged at 3000 r / min for 2 min. The final resul...

Embodiment 3

[0030] A method for synthesizing multi-branched Pt metal nanocrystals, using platinum acetylacetonate as a metal precursor, n-hexadecyl formamide as a reducing agent, methyl trioctylammonium bromide as a surfactant and a structure-directing agent , using oleylamine as a solvent to obtain multi-branched Pt metal nanocrystals by a "one-pot method".

[0031] Pt(acac) 2 , n-hexadecyl formamide, and methyl trioctyl ammonium bromide were poured into the flask, and then oleylamine was added to dissolve the mixture in oleylamine, ultrasonicated for 50 minutes to fully dissolve and disperse, and then the flask was placed in In an oil bath, heat up and raise the reaction temperature from room temperature to 210°C within 30 minutes, and then maintain this temperature for 11 hours. After the reaction, cool naturally to room temperature, and add 8 mL of The mixed solution of ethanol and 1mL cyclohexane was ultrasonically mixed, and centrifuged. The obtained solid was washed 5 times with a...

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Abstract

The invention relates to a method for synthesizing multi-branch Pt metal nanocrystals. Using platinum acetylacetonate as a metal precursor, n-hexadecyl formamide as a reducing agent, cetyltrimethylammonium bromide or methyltrioctylammonium bromide as a surfactant and a structure-directing agent, Multibranched Pt metal nanocrystals were obtained by a "one-pot method" using oleylamine as a solvent. The invention discloses a method for synthesizing multi-branched Pt metal nanocrystals, which has simple process and can control the shape and size of Pt nanocrystals, and the obtained products have excellent dispersibility and no agglomeration phenomenon.

Description

technical field [0001] The invention relates to a method for synthesizing multi-branch Pt metal nanocrystals, in particular to a method for preparing six-branch Pt metal nanocrystals, and belongs to the technical field of nanomaterials. Background technique [0002] Due to its good performance, Pt metal nanocrystals are widely used in various fields such as catalysis, optics, microelectronics, sensing, and medicine. As a catalyst, its catalytic performance is good, and it has a very wide range of applications in organic catalysis and electrocatalysis. The properties of Pt metal nanocrystals are closely related to their morphology, structure, size and other factors. [0003] In recent years, a variety of methods and technologies have been applied to the synthesis of Pt metal nanocrystals, and various reducing agents and structure-directing agents are used to control the size of the nanocrystals. So far, the problems encountered in the process of synthesizing small-sized Pt ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0553B22F1/054
Inventor 陈伟陈艳贺彩虹鲁少杰黄少铭
Owner WENZHOU UNIV
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