Highly-ordered mesoporous carbon spheres and preparation method thereof

A highly ordered, mesoporous carbon technology, applied in the field of inorganic materials, can solve problems such as complex steps, and achieve the effects of large preparation, high order, and easy availability of raw materials

Inactive Publication Date: 2015-12-09
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple in principle, but the steps are complicated, requiring additional preparation of the template, and the use of hydrofluoric acid or sodium hydroxide to remove the silicon template

Method used

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  • Highly-ordered mesoporous carbon spheres and preparation method thereof
  • Highly-ordered mesoporous carbon spheres and preparation method thereof
  • Highly-ordered mesoporous carbon spheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: 36g of iron oleate and 8.5g of oleic acid were dissolved in 200g of octadecene, and reacted at 320° C. for 1 hour under the protection of nitrogen to obtain ferric oxide nanoparticles with a particle size of about 14nm. Dissolve the obtained nanoparticles in 40ml of n-hexane, and then drop 20ml of this solution into 200ml of water containing 4g of dodecyltrimethylammonium bromide under stirring to form an O / W (oil-in-water) type emulsion, heat up and blow After the organic solvent is evaporated, the product is adsorbed by a magnet or centrifuged, the supernatant is discarded, and the obtained precipitate is washed with ethanol to obtain nanoparticle microspheres with a particle size of about 300nm and a highly ordered secondary structure. The obtained nanoparticle microspheres were calcined at 500° C. for 2 hours under nitrogen, so that the oleic acid molecules coated on the surface of the nanoparticles were carbonized, and the microspheres formed by stacking ...

Embodiment 2

[0025] Example 2: Dissolve 36 g of iron oleate and 8.5 g of oleic acid in 200 g of octadecene, and react at 320° C. for 1 hour under nitrogen protection to obtain ferric oxide nanoparticles with a particle size of about 14 nm. Dissolve the obtained nanoparticles in 40ml of n-hexane, and then drop 40ml of this solution into 200ml of water containing 8g of dodecyltrimethylammonium bromide under stirring to form an O / W (oil-in-water) type emulsion, heat up and blow After the organic solvent is evaporated, the product is adsorbed by a magnet or centrifuged, the supernatant is discarded, and the obtained precipitate is washed with ethanol to obtain spherical shells of nanoparticles with a particle size of about 1 μm and a highly ordered secondary structure. hollow microspheres. The obtained nanoparticle microspheres were calcined at 500° C. for 2 hours under nitrogen, so that the oleic acid molecules coated on the surface of the nanoparticles were carbonized, and the microspheres f...

Embodiment 3

[0026] Example 3: Dissolve 36 g of iron oleate and 8.5 g of oleic acid in 200 g of octadecene, and react at 280° C. for 1 hour under nitrogen protection to obtain ferric oxide nanoparticles with a particle size of about 6 nm. Dissolve the obtained nanoparticles in 40ml of n-hexane, and then drop 20ml of this solution into 200ml of water containing 4g of dodecyltrimethylammonium bromide under stirring to form an O / W (oil-in-water) type emulsion, heat up and blow After the organic solvent is evaporated, the product is adsorbed by a magnet or centrifuged, the supernatant is discarded, and the obtained precipitate is washed with ethanol to obtain nanoparticle microspheres with a particle size of about 300nm and a highly ordered secondary structure. The obtained nanoparticle microspheres were calcined at 500° C. for 2 hours under nitrogen, so that the oleic acid molecules coated on the surface of the nanoparticles were carbonized, and the microspheres formed by stacking highly order...

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Abstract

The invention belongs to the technical field of inorganic materials and particularly provides a highly-ordered mesoporous carbon sphere and a preparation method of same. The preparation method includes following steps: 1) performing a high-temperature pyrolysis reaction to a nano particle precursor to obtain metal oxide nano particles coated by oleic acid; 2) dissolving the nano particles in an organic solvent, adding the solution into a water phase containing a surfactant to form an O / W emulsion; 3) enabling the solvent in oil drops to be volatilized and evaporated so that the nano particles are arranged and assembled to form microspheres; 4) performing adsorption separation by a magnet and high-temperature carbonization to obtain the microspheres which is formed by stacking the high-orderly-arranged carbon-coated metal oxide nano particles; and 5) finally etching the microspheres to remove the nano particles to obtain the highly-ordered mesoporous carbon spheres. The method is simple. The raw materials are easy to obtain. The method is low in cost. The highly-ordered mesoporous carbon sphere is very high in specific surface area and has an excellent application prospect in the fields of energy storage, medical treatment and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a highly ordered mesoporous carbon sphere and a preparation method thereof. Background technique [0002] Due to its huge specific surface area and pore volume, mesoporous carbon has a very strong adsorption capacity, so it plays a very important role in adsorbents. Most of the mesoporous materials synthesized under hydrothermal conditions are in the split state, which is not conducive to its application. In contrast, mesoporous microspheres have the advantages of uniform particles and easy separation, and have broader application prospects in the fields of adsorption, separation, and catalysis. [0003] The traditional method for preparing ordered mesoporous carbon spheres has a two-step casting method: the first step is to use opal-structured PMMA spheres as a template, and add silica precursor solution to cast to obtain silica inverse opal. The second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 董安钢郭冠南汲丽杨柳杨东胡建华
Owner FUDAN UNIV
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