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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  • Abstract
  • Description
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  • Application Information

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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 polymeriz

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

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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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