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Preparation method of multinuclear platinum-polymer nanometer core-shell material

A nano-core-shell and polymer technology, which is applied in nanotechnology, microsphere preparation, microcapsule preparation, etc., can solve the problems of single-core material and polymer shell coating process difficult to control, etc., to achieve uniform material appearance, The synthesis process is simple and controllable, and the effect with a wide range of applications

Active Publication Date: 2018-08-21
5ELEM HI TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the core-shell materials of polymer-coated metal particles generally need to prepare metal nanoparticles in advance, and then polymerize the shell on the surface of the metal core. The coating process of the polymer shell is difficult to control, and most of them are single-core. Material

Method used

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  • Preparation method of multinuclear platinum-polymer nanometer core-shell material
  • Preparation method of multinuclear platinum-polymer nanometer core-shell material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Weigh 0.10 g CTAB and 0.25 g F127, add a mixture of 8 mL deionized water and 10 mL absolute ethanol, stir at 40 °C for 30 minutes, add 0.30 mL 25 wt% ammonia water and continue stirring for 30 minutes;

[0023] (2) Add 0.15 g resorcinol, stir for 30 minutes, add 0.25 mL formaldehyde solution, stir the mixture at 30 °C for 24 hours, then add 0.30 mL 0.1 M platinum chloride PtCl 4 aqueous solution, and the solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor, and reacted for 20 hours at 100 °C;

[0024] (3) The product was centrifuged, washed with water and ethanol, dried overnight in an oven at 60 °C, and ground with an agate mortar to obtain Pt@RF nano-core-shell microspheres containing multiple cores. figure 1 It is the SEM photo of the nano core-shell microsphere.

Embodiment 2

[0026] (1) Weigh 0.15 g CTAB and 0.30 g F127, add a mixture of 10 mL deionized water and 12 mL absolute ethanol, stir at 30 °C for 50 minutes, add 0.10 mL 0.5 M sodium hydroxide NaOH aqueous solution and continue stirring 30 minutes;

[0027] (2) Add 0.20 g resorcinol, stir for 30 minutes, add 0.35 mL formaldehyde solution, stir the mixture at 30 °C for 24 hours, then add 0.50 mL 0.1 M chloroplatinic acid H 2 PtCl 6 ·6H 2 O aqueous solution, and the solution is transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and reacted for 24 hours at 100 ° C;

[0028] (3) The product was centrifuged, washed with water and ethanol, dried overnight in an oven at 60 °C, and ground with an agate mortar to obtain Pt@RF nano-core-shell microspheres containing multiple cores. figure 2 It is the transmission electron microscope TEM photograph of this nano-core-shell microsphere.

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Abstract

The invention discloses a preparation method of a multinuclear platinum-polymer nanometer core-shell microsphere. The preparation method comprises the steps: firstly, synthesizing a resorcinol-formaldehyde resin (RF) nanometer microsphere from resorcinol and formaldehyde serving as precursors, sodium hydroxide or ammonia water serving as a catalyst and an alkalinity regulator as well as surfactants CTAB and F127 serving as co-stabilizers in an alcohol-water solution by using an improved Stuber method; and then, preparing a multinuclear nanometer microsphere with resorcinol-formaldehyde resin (Pt@RF) coated outside platinum from chloroplatinic acid or platinum chloride serving as a platinum source by using a hydrothermal method. The synthesis method can be expanded to prepare other preciousmetal-polymer core-shell microspheres, for example, the synthesis method can be used for preparing composites such as multinuclear Au@RF and Pd@RF. In addition, precious metal-porous carbon materialssuch as Pt@C, Au@C and Pd@C can be prepared by taking the precious metal-polymer core-shell microspheres as precursors and can be applied to the field such as catalysis or lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of functional nano-core-shell materials, and specifically discloses a preparation method of a platinum-polymer nano-core-shell material containing multiple cores. Background technique [0002] In recent years, composite materials with special core-shell structures have attracted extensive attention and have been applied in the fields of catalysis, adsorption, bioimaging, drug delivery, and lithium-ion batteries. The core-shell material has the functions of both the core and the shell, and the outer shell can also prevent the inner nanoparticle core from agglomerating or deforming. A variety of shells have been prepared to coat metal nanoparticles, including polymers, silica, carbon, zirconia, and titania. Among them, the core-shell materials of polymer-coated metal particles have aroused people's research interest and have been successfully applied in catalysis, antibacterial and biological imaging. [000...

Claims

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Application Information

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IPC IPC(8): B01J13/12C08G8/22B82Y40/00
CPCB01J13/12B82Y40/00C08G8/22
Inventor 陈俊琛秦庆戊
Owner 5ELEM HI TECH CORP
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