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Method for synthesis of double-casing layer carbon nanometer hollow polyhedron by metal-organic framework as template

A metal-organic framework and compound technology, applied in the field of synthesizing double-shell carbon nano-hollow polyhedron, can solve the problems of cumbersome preparation process, inability to realize large-scale production, difficult nano-template, etc., and achieve simple process, easy large-scale production, wide The effect of the application foreground

Inactive Publication Date: 2015-12-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this kind of method is cumbersome, it is difficult to prepare a large number of nano-templates, and the subsequent corrosion of the template often requires toxic etchant, so large-scale production cannot be realized

Method used

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  • Method for synthesis of double-casing layer carbon nanometer hollow polyhedron by metal-organic framework as template
  • Method for synthesis of double-casing layer carbon nanometer hollow polyhedron by metal-organic framework as template
  • Method for synthesis of double-casing layer carbon nanometer hollow polyhedron by metal-organic framework as template

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Prepare 30 mL of methanol solution of zinc nitrate hexahydrate (2M) and 10 mL of methanol solution of 2-methylimidazole (12 M), mix them at room temperature, stir for 2 minutes and then let stand for reaction for 24 hours. After the reaction, wash and centrifuge repeatedly with methanol for 3 times, dry and collect to obtain the white powder of zinc-based zeolite imidazolate metal-organic framework compound material;

[0023] (2) Disperse the zinc-based zeolite imidazolate metal-organic framework compound material prepared in step (1) in 30 mL of methanol solution (1M) of cobalt nitrate hexahydrate, and then add 10 mL of 2-methylimidazole in methanol solution (8M) , stirred at room temperature for 24 hours. After the reaction, wash and centrifuge repeatedly with ethanol for 3 times, dry and collect cobalt / zinc-based zeolite imidazolate metal-organic framework core-shell structure purple-red powder;

[0024] (3) Heat the cobalt / zinc-based zeolite imidazolate metal-o...

Embodiment 2

[0027] (1) Prepare 30mL methanol solution of zinc nitrate hexahydrate (2M) and 10mL methanol solution of 2-methylimidazole (12M), mix them at room temperature, stir for 2 minutes and react at 120°C for 24 hours. After the reaction, wash and centrifuge repeatedly with methanol for 3 times, dry and collect to obtain the white powder of zinc-based zeolite imidazolate metal-organic framework compound material;

[0028] (2) with embodiment 1 step (2);

[0029] (3) with embodiment 1 step (3);

[0030] (4) With embodiment 1 step (4), the average outer diameter of the hollow nanoparticles in the black powder is about 3 μm, the average thickness of the shell is 280nm, the shell is graphitized carbon, the thickness is 40nm, and there is a shorter carbon Nanotubes grow with an inner shell of amorphous carbon. The specific surface area of ​​the powder is 638m 2 g -1 , the total pore volume is 0.428m 3 g -1 .

Embodiment 3

[0032] (1) with embodiment 1 step (1);

[0033] (2) Disperse the zinc-based zeolite imidazolate metal-organic framework compound material prepared in step (1) in 10 mL of methanol solution (1M) of cobalt nitrate hexahydrate, and then add 10 mL of 2-methylimidazole in methanol solution (2M) , stirred at room temperature for 24 hours. After the reaction, wash and centrifuge repeatedly with ethanol for 3 times, dry and collect cobalt / zinc-based zeolite imidazolate metal-organic framework core-shell structure purple-red powder;

[0034] (3) with embodiment 1 step (3);

[0035] (4) With embodiment 1 step (4), the average outer diameter of the hollow nanoparticles in the gained black powder is about 900nm, and the average thickness of the shell is 100nm, and the shell is graphitized carbon, and the thickness is 20nm, with shorter carbon on it. Nanotubes grow with an inner shell of amorphous carbon. The specific surface area of ​​the powder is 554m 2 g -1 , the total pore volume...

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Abstract

The invention discloses a method for synthesis of a double-casing layer carbon nanometer hollow polyhedron by a metal-organic framework as a template and belongs to the field of novel energy and novel materials. The method comprises that a zeolitic imidazolate framework with a core-shell nanometer structure as a structure precursor is calcined at a high temperature to form the double-casing layer nanometer carbon hollow polyhedron. The cheap and easily available zeolitic imidazolate framework as a structure precursor is used for preparation of the double-casing layer carbon nanometer hollow polyhedron. The method has simple processes, is free of a template, realizes precise control of a shell structure by change of a zinc / cobalt-based zeolitic imidazolate framework ratio or calcining conditions, is environmentally friendly and can be industrialized easily. The double-casing layer carbon nanometer hollow polyhedron has a wide application prospect in the fields of energy storage, catalysis, photoelectric materials and drug transport.

Description

Technical field [0001] The present invention involves a method of using metal organic skeleton compounds as templates to synthesize double -shell -layer carbon nano -hollow polyhedron, which belongs to the field of new energy and new materials. Background technique [0002] Due to the size effect of nanomaterials, it has a far -high physical and chemical properties that are far superior to macro -block materials, which has attracted widespread attention from the world.The performance of functional nanomaterials is largely dependent on its appearance, size, and crystal structure. It has fine control of its micro -structures, and the realization of structural design and controllable construction has become a hot spot for nanomaterial science research in recent years. [0003] Honesty nanomaterials are a unique nano structure with a variety of hollow inner cavity and nano -order thickness.Compared with conventional nanoparticles, hollow nanomaterials can provide larger surface area,...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 邱介山王治宇刘绍鸿
Owner DALIAN UNIV OF TECH
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