MXene and graphene oxide composite aerogel, and preparation method and applications thereof

A graphene composite and airgel technology, which is applied in the direction of airgel preparation, chemical instruments and methods, and separation methods, can solve the problems of low light-to-heat conversion efficiency, poor mechanical properties, and insufficient comprehensive purification capabilities, and achieve high The effect of light-to-heat conversion efficiency, reduced energy loss, and simple preparation process

Active Publication Date: 2019-08-06
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current problems in this field are low photothermal conversion efficiency, insufficient heat

Method used

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  • MXene and graphene oxide composite aerogel, and preparation method and applications thereof
  • MXene and graphene oxide composite aerogel, and preparation method and applications thereof
  • MXene and graphene oxide composite aerogel, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The present invention provides a kind of preparation method of MXene and graphene oxide composite airgel, and specific operation steps are as follows:

[0049] (1) Synthesis of MXene aqueous dispersion and graphene oxide aqueous dispersion: MAX powder and graphite powder were chemically exfoliated to obtain 2 mg / mL MXene and graphene oxide aqueous dispersion, respectively.

[0050] (2) Preparation of MXene and graphene oxide mixed gel solution: mix and stir 10mL of MXene water dispersion solution, 30mL graphene oxide water dispersion solution and 10mL 2mg / mL sodium alginate water dispersion solution evenly to obtain a mixture gel solution.

[0051] (3) Uncrosslinked MXene and graphene oxide composite aerogel: place the mixed gel solution obtained in step (2) at -30°C for 12 hours to freeze until it forms a block, and then place it in a freeze dryer for freeze-drying 12h, the uncrosslinked MXene and graphene oxide composite airgel was obtained.

[0052] (4) Preparation...

Embodiment 2

[0054] According to the preparation steps and reaction process of Example 1, only the graphene oxide solution is removed, and the types and proportions of the remaining configuration materials remain unchanged, so that the final airgel based on a single MXene can be obtained.

Embodiment 3

[0056] According to the preparation steps and reaction process of Example 1, only the MXene solution is removed, and the types and proportions of the remaining configuration materials remain unchanged, and the final single graphene oxide-based airgel can be obtained.

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Abstract

The invention provides a preparation method for a MXene and graphene oxide composite aerogel. The preparation method includes the following steps: 1) respectively performing chemical peeling on MAX powder and graphite powder, and respectively obtaining a MXene water dispersion solution and a graphene oxide water dispersion solution; 2) mixing and stirring the MXene water dispersion solution, the graphene oxide water dispersion solution and a sodium alginate water dispersion solution so that a mixed gel solution can be obtained; 3) performing directional freeze-drying treatment on the mixed gelsolution so that uncross-linked MXene and graphene oxide composite aerogel can be obtained; and 4) adding an ion crosslinking agent in the uncross-linked MXene and graphene oxide composite aerogel toperform ion crosslinking, and performing freeze-drying again so that crosslinked MXene and graphene oxide composite aerogel can be obtained. In addition, the MXene and graphene oxide composite aerogel prepared by the method, and applications thereof in the field of solar steam generation, seawater desalination, sewage purification, oil-water separation, and sterilization and disinfection are alsoprovided.

Description

technical field [0001] The invention belongs to the technical field of photothermal conversion materials, in particular to a composite airgel of MXene and graphene oxide and its preparation method and application Background technique [0002] In recent years, with the energy crisis, environmental pollution, water shortage and other major problems need to be solved urgently. Solar energy has become a research hotspot in the field of renewable energy utilization due to its many advantages such as wide sources, sufficient reserves, and greenness and cleanliness. As we all know, 71% of the earth's area is covered by water, of which the total amount of seawater is 1338×1 billion cubic meters, accounting for about 96.5% of the total global water. In the remaining amount of water, surface water accounts for 1.78%, and groundwater accounts for 1.69%. The total amount of fresh water resources that humans can mainly use is about 3.5 billion cubic meters, accounting for only 2.53% of...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/20B01J20/24B01J20/28C02F1/00C02F1/28C02F1/50C02F103/08B01D17/022
CPCB01D17/0202B01J13/0091B01J20/20B01J20/24B01J20/28047C02F1/00C02F1/283C02F1/286C02F1/50C02F2103/08
Inventor 王贤保明鑫梅涛李金华王建颖钱静雯
Owner HUBEI UNIV
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