Magnetic hollow multihole carbon ball with core-shell structure and preparation method of magnetic hollow multihole carbon ball

A core-shell structure, hollow porous technology, which is applied in the preparation of microspheres, the magnetic properties of inorganic materials, and the preparation of microcapsules. , the effect of regular structure

Inactive Publication Date: 2013-04-17
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current problem is that the steps of the template method are cumbersome, and the

Method used

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  • Magnetic hollow multihole carbon ball with core-shell structure and preparation method of magnetic hollow multihole carbon ball
  • Magnetic hollow multihole carbon ball with core-shell structure and preparation method of magnetic hollow multihole carbon ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The ferroferroic oxide magnetic cluster is about 250nm, and the thickness of the phenolic resin shell layer is about 60nm.

[0022] 10-200 mg Fe 3 o 4 The nanoclusters are dispersed in deionized water, then 1-20 mL of styrene and 10-200 mg of potassium persulfate are added, and soap-free emulsion polymerization is carried out in nitrogen for 2-6 hours to obtain Fe 3 o 4 PS composite microspheres. will get Fe 3 o 4 PS composite microspheres were dispersed in deionized water, added 0.1-2 mL formaldehyde, 40 mg phenol and 0.15 mL ammonia water and transferred to a microwave tube to react under microwave irradiation. The microwave reaction temperature was 120°C-200°C, the reaction time was 40 min, and the microwave tube was cooled to room temperature and taken out. The product was separated by magnetic separation, and the reactant was washed with deionized water and absolute ethanol, and dried in a vacuum oven at 50° C. for 4 hours. Will Fe 3 o 4 PSPF...

Embodiment 2

[0023] Example 2: The magnetic cluster of ferroferrogen tetroxide is about 250nm, and the thickness of the shell layer of phenolic resin is 90nm.

[0024] The steps are the same as those described in Example 1, except that the amount of phenol is changed from 40 mg to 60 mg.

Embodiment 3

[0025] Example 3: The ferroferrogen tetroxide magnetic cluster is about 250 nm, and the thickness of the phenolic resin shell layer is 120 nm.

[0026] The steps were the same as described in Example 1, except that the amount of phenol was changed from 40 mg to 90 mg.

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Abstract

The invention belongs to the technical field of composite materials, and in particular relates to a magnetic hollow multihole carbon ball with a core-shell structure and a preparation method of the magnetic hollow multihole carbon ball. the core of a core-shell type hollow micro-hole magnetic carbon ball prepared by a microwave hydrothermal method is a magnetic ferroferric oxide nano cluster; and a shell layer is multihole carbon. The preparation method comprises the following steps of: wrapping a template shell layer on the surface of ferroferric oxide by taking the ferroferric oxide nano cluster as a seed through soap-free emulsion polymerization, then wrapping the surface of a ferroferric oxide composite micro ball with phenolic resin through in-situ polymerization according to the microwave hydrothermal method, and finally carbonizing the ferroferric oxide composite micro ball at certain temperature to obtain the magnetic hollow multihole carbon ball with the core-shell structure, wherein the obtained composite carbon ball has the characteristics of uniform granularity, controllable carbon layer thickness and narrow aperture distribution. The preparation method is easy to operate, and a process is controllable; and the carbon ball and the preparation method have a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a magnetic hollow porous carbon sphere with a core-shell structure and a preparation method thereof. Background technique [0002] Porous carbon materials have attracted extensive attention due to their high porosity, high specific surface area, good electrical conductivity and chemical stability, which have important application value in the fields of catalysis, adsorption separation, ion exchange and electrochemical energy storage (Jinwoo Lee, Jaeyun Kim , Taeghwan Hyeon. Adv. Mater. 2006). Hollow carbon spheres have excellent chemical and thermal stability, light weight, and good compression resistance, so they are widely used in the fields of electrode materials, energy storage and hydrogen storage materials, adsorption materials, lubricants, and catalyst carriers (Inagaki M, Synthetic Metals. 2002). [0003] At present, the preparation of porous car...

Claims

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Application Information

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IPC IPC(8): B01J13/02H01F1/34
Inventor 汪长春游力军
Owner FUDAN UNIV
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