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Rapid preparation method of graphene/nanoparticle aerogel

A nanoparticle and aerogel technology, applied in the field of nanomaterials, can solve the problems of single function and long time consumption, and achieve the effect of less energy consumption and rapid formation.

Inactive Publication Date: 2017-11-24
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods generally require multiple steps, take a long time, or have a single function

Method used

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  • Rapid preparation method of graphene/nanoparticle aerogel
  • Rapid preparation method of graphene/nanoparticle aerogel
  • Rapid preparation method of graphene/nanoparticle aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 12 mL of an aqueous solution containing 1 mg / mL graphene oxide and 1 uL of the reducing agent hydrazine hydrate were ultrasonically mixed and filled into a vial, and then 600 uL of 2-methylimidazole zinc salt nanoparticle solution with a concentration of 20 mg / mL was added to the vial and ultrasonically mixed. The vial was airtight and placed in an oven at 90° C. for 1 hour to obtain a hydrogel, and the hydrogel was taken out and freeze-dried to obtain an aerogel. Such as figure 1 As shown, the 2-methylimidazolium zinc salt (ZIF-8) with cubic crystal form is uniformly distributed on the graphene sheet. Such as Figure 1a , 1b As shown in and 1c, the C=O of graphene oxide is reduced, and the new hybrid airgel produced has more characteristic peaks of ZIF-8.

Embodiment 2

[0033] 10mL of graphene oxide aqueous solution containing 1.5mg / mL and 1uL of reducing agent hydrazine hydrate were ultrasonically mixed and put into a vial, then 700uL of ferric oxide nanoparticle solution with a concentration of 30mg / mL was added to the vial for ultrasonic mixing, and the vial was sealed Place in an oven at 90° C. for 1 hour to obtain a hydrogel, and take out the hydrogel to freeze-dry to obtain an aerogel. Such as figure 2 As shown, the small particles of Fe3O4 are uniformly distributed on the graphene sheets. Such as Figure 2a , 2b As shown in and 2c, the C=O of graphene oxide is reduced, and the new mixture airgel produced has more characteristic peaks of ferric oxide.

Embodiment 3

[0035] 15mL aqueous solution containing 2mg / mL graphene oxide and 1.5uL reducing agent hydrazine hydrate were ultrasonically mixed and put into a vial, then 800uL zinc oxide nanoparticle solution with a concentration of 40mg / mL was added to the vial and ultrasonically mixed, the vial was sealed and placed in In an oven at 95° C. for 1 hour, a hydrogel was prepared, and the hydrogel was taken out and freeze-dried to obtain an aerogel. The electron microscope image of the prepared airgel is shown in image 3 As shown, an aerogel with a macroporous structure is formed, and ZnO particles are uniformly distributed on the graphene sheet.

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Abstract

The invention discloses a rapid preparation method of graphene / nanoparticle aerogel. The rapid preparation method comprises the steps that an aqueous solution of graphene oxide and a reducing agent are ultrasonically mixed to prepare a mixed solution; an organic metal frame / metallic oxide nanoparticle solution is added into the mixed solution I, ultrasonic mixing is carried out, and a mixed solution II is prepared; and the mixture II is dried to prepare hydrogel, and continues to be frozen and dried to prepare aerogel. An oxygen-containing group in oxidized graphene is removed through the reducing agent, and the formed aerogel has the properties of hydrophobicity, flame retardance and conductivity. Due to the fact that the organic metal frame such as 2-methylimidazole is of a porous polymer and hydrophobic and coarse structure, the aerogel has the properties of super-hydrophobicity and the high specific area; and aerogel can have magnetism through the metallic oxide such as ferroferric oxide.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and more specifically relates to a method for rapidly and mass-preparing graphene / nanoparticle airgel. Background technique [0002] Since graphene was successfully prepared by Professor A.K. Geim's research group in 2004, it has gradually discovered its excellent photoelectric performance, machine performance, and thermal performance, and has quickly become a research hotspot. Graphene airgel, as a macroscopic assembly material of graphene, has a series of properties such as ultra-light, high elasticity, high specific area, hydrophobicity, and flame retardancy, and has received great attention. [0003] Existing methods for preparing graphene airgel generally include hydrothermal method, template-directed method, and additive cross-linking method. These methods generally require multiple steps, take a long time, or have a single function. More and more attention has been paid to the simple and eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194C01B32/192C08L87/00C08K3/04C08J9/28B01J13/00
CPCB01J13/0091C08J9/28C08J2201/0484C08J2205/026C08J2387/00C08K3/04C08L2203/14C08L87/00
Inventor 黄剑莹毛佳俊孟凯张克勤赖跃坤
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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