Hollow-structure material as well as preparation method and application thereof

A hollow structure and hollow nano technology, which is applied in the preparation of microspheres, structural parts, microcapsule preparations, etc., can solve the problems of difficulty in large-scale promotion and the limitation of material synthesis efficiency in the synthesis process, and achieve easy operation and easy control of conditions , Improve the effect of reaction kinetics

Pending Publication Date: 2022-02-25
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, many methods for synthesizing complex hollow structures are mainly soft template method and hard template method. The complex and cumbersome synthesis process limits the synthesis efficiency of materials, and it is difficult to achieve large-scale industrialization.

Method used

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  • Hollow-structure material as well as preparation method and application thereof
  • Hollow-structure material as well as preparation method and application thereof
  • Hollow-structure material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of metal organic framework ZIF-8:

[0031] Dissolve 6g of zinc acetate in 100ml of deionized water, dissolve 18.22mg of CTAB and 22.33g of dimethylimidazole in 100ml of deionized water, then mix and stir the two solutions for 5min, leave to age for 3h to obtain a white suspension, and centrifuge to wash and dry Finally, a white metal-organic framework ZIF-8 solid powder was obtained.

[0032] (2) Preparation of multi-chamber metal-organic framework ZIF-8:

[0033] Take 0.5g metal organic framework ZIF-8 powder and disperse it in 150ml deionized water, take 1.25g tannic acid and dissolve it in 100ml deionized water, mix and stir the two solutions for 5min, so that tannic acid can etch ZIF-8, The multi-chamber metal-organic framework ZIF-8 solid powder was obtained after centrifugal washing and drying.

[0034] (3) Preparation of multi-chamber hollow carbon materials:

[0035] The obtained multi-chamber metal-organic framework ZIF-8 solid powder was hea...

Embodiment 2

[0043] (1) Preparation of metal organic framework ZIF-8:

[0044]Dissolve 6g of zinc acetate in 100ml of deionized water, dissolve 18.22mg of CTAB and 22.33g of dimethylimidazole in 100ml of deionized water, then mix and stir the two solutions for 5min, leave to age for 2h to obtain a white suspension, and centrifuge to wash and dry Finally, a white metal-organic framework ZIF-8 solid powder was obtained.

[0045] (2) Preparation of simple hollow metal-organic framework ZIF-8:

[0046] Take 0.5g metal organic framework ZIF-8 powder and disperse it in 150ml deionized water, take 1.25g tannic acid and dissolve it in 100ml deionized water, mix and stir the two solutions for 60min, so that tannic acid can etch ZIF-8, The simple hollow metal-organic framework ZIF-8 solid powder was obtained after centrifugal washing and drying.

[0047] (3) Preparation of simple hollow carbon materials:

[0048] The obtained multi-chamber metal-organic framework ZIF-8 was heated to 900 °C for 3 ...

Embodiment 3

[0051] (1) Preparation of metal organic framework ZIF-8:

[0052] Dissolve 6g of zinc acetate in 100ml of deionized water, dissolve 18.22mg of CTAB and 22.33g of dimethylimidazole in 100ml of deionized water, then mix and stir the two solutions for 5min, leave to age for 2h to obtain a white suspension, and centrifuge to wash and dry Finally, a white metal-organic framework ZIF-8 solid powder was obtained.

[0053] (2) Preparation of ZIF8@ZIF67:

[0054] Take 0.6g ZIF-8 and 0.6g Co(NO 3 ) 2 ·6H 2 O was dispersed in 200 ml of methanol, 0.6 g of dimethylimidazole was dissolved in 100 ml of methanol, the two solutions were mixed and stirred for 2 h, and the ZIF8@ZIF67 solid powder was obtained after centrifugal washing and drying.

[0055] (3) Preparation of egg yolk-eggshell structure:

[0056] Take 0.5g of ZIF8@ZIF67 solid powder and disperse it in 150ml of deionized water, take 1.25g of tannic acid and dissolve it in 100ml of deionized water, mix and stir the two solution...

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Abstract

The invention provides a hollow-structure material and a preparation method and application thereof. The preparation method comprises the following steps: a) preparing a metal organic framework material (MOF); b) etching the MOF material obtained in the step a) with a macromolecular acid solution to obtain a hollow MOF material; and c) performing high-temperature carbonization on the hollow MOF material obtained in the step b) to obtain the MOF derivative material with a hollow structure. The preparation method provided by the invention is simple and efficient in process, mild in conditions and high in safety, can obtain materials with various hollow structures including a simple hollow structure, a yolk-eggshell structure, a multi-cavity structure and the like, and has a wide application prospect; and a multi-cavity hollow structure material is used as a sulfur carrier to further prepare a multi-cavity hollow structure / sulfur composite electrode which is applied to a room-temperature sodium-sulfur battery, so the utilization rate and reaction kinetics of sulfur are greatly improved.

Description

technical field [0001] The invention relates to the technical field of synthesis of inorganic nanomaterials, and more specifically relates to a hollow structure material, including a simple hollow structure, an egg yolk-eggshell structure, a multi-chamber structure, and a preparation method and application thereof. Background technique [0002] Hollow structures, including simple hollow structures, especially complex hollow structures, the unique hierarchical building units of hollow structures not only have excellent properties of nanomaterials, but also their voids can be used as buffer zones to ease volume expansion during material reactions, and It is conducive to the transmission of gas or liquid inside it, so it has a wide range of applications in the fields of sensors, photocatalysis, drug delivery, solar cells, lithium-ion batteries and supercapacitors. However, at present, many methods for synthesizing complex hollow structures are mainly soft template method and ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J13/06H01M4/38H01M4/62H01M10/39
CPCB01J13/02B01J13/06H01M4/628H01M4/38H01M10/3909H01M2004/028H01M2004/021Y02E60/10
Inventor 余彦李东君程晓龙姚雨
Owner UNIV OF SCI & TECH OF CHINA
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