ZIF-67@MXene composite material as well as preparation method and application thereof

A technology of ZIF-67 and composite materials, applied in electrolytic components, electrodes, electrolytic process, etc., can solve problems such as poor conductivity

Active Publication Date: 2021-04-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor electrical conductivity of MOFs, it is still challenging to directly utilize them as efficient electrocatalysts.

Method used

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  • ZIF-67@MXene composite material as well as preparation method and application thereof
  • ZIF-67@MXene composite material as well as preparation method and application thereof
  • ZIF-67@MXene composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of ZIF-67@MXene composite material, comprising the following steps:

[0030] A. Take a clean plastic cup, add 30mL of 40% hydrofluoric acid solution, weigh 1g of MAX powder into the hydrofluoric acid solution, and stir for 24 hours until uniform. Then, the reacted product was centrifuged repeatedly, and the supernatant was washed with deionized water until the pH value was greater than 6. Finally, vacuum drying was carried out at 60°C for 10 hours, as figure 1 As shown, a SEM image with a layered structure was obtained. Additionally, by figure 2 The X-ray diffraction pattern of the prepared MXene powder can be obtained.

[0031] B. Take a clean beaker, add 20 mL of methanol solution, weigh 60 mg of MXene powder prepared in step A, and process it ultrasonically for 15 minutes to obtain MXene / methanol dispersion (3 mg / mL). 0.249 g Co(CH 3 COO) 2 4H 2 O was added to the MXene / methanol dispersion and ultrasonically dispersed for 1 h. Take anoth...

Embodiment 2

[0033] A preparation method of ZIF-67@MXene composite material, comprising the following steps:

[0034] A. Take a clean plastic cup, add 30mL of 40% hydrofluoric acid solution, weigh 1g of MAX powder into the hydrofluoric acid solution, and stir for 48 hours until uniform. Then, the reacted product was centrifuged repeatedly, and the supernatant was washed with deionized water until the pH value was greater than 6. Finally, a vacuum drying treatment was performed at 65° C. for 12 hours.

[0035] B. Take a clean beaker, add 20 mL of methanol solution, weigh 100 mg of MXene powder prepared in step A, and ultrasonically treat it for 15 minutes to obtain MXene / methanol dispersion (5 mg / mL). 0.249 g Co(CH 3 COO) 2 4H 2 O was added to the MXene / methanol dispersion and ultrasonically dispersed for 1 h. Take another clean beaker, add 20 mL of methanol solution, weigh 0.656 g of 2-methylimidazole, pour it into the methanol solution, and stir for 30 min. Finally, pour 20 mL of 2-...

Embodiment 3

[0037] A preparation method of ZIF-67@MXene composite material, comprising the following steps:

[0038] A. Take a clean plastic cup, add 30mL of 40% hydrofluoric acid solution, weigh 1g of MAX powder into the hydrofluoric acid solution, and stir for 36 hours until uniform. Then, the reacted product was centrifuged repeatedly, and the supernatant was washed with deionized water until the pH value was greater than 6. Finally, a vacuum drying treatment was performed at 70° C. for 14 hours.

[0039] B. Take a clean beaker, add 20 mL of methanol solution, weigh 80 mg of MXene powder prepared in step A, and process it ultrasonically for 15 minutes to obtain MXene / methanol dispersion (4 mg / mL). 0.291 g Co(NO 3 ) 2 ·6H 2O was added to the MXene / methanol dispersion and ultrasonically dispersed for 1 h. Take another clean beaker, add 20mL of methanol solution, weigh 0.492g of 2-methylimidazole, pour it into the methanol solution, and stir for 30min. Finally, 20 mL of 2-methylimid...

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Abstract

The invention provides a ZIF-67@MXene composite material as well as a preparation method and application thereof, belonging to the technical field of nanomaterials. The preparation method comprises the following steps: etching MAX powder with hydrofluoric acid to synthesize MXene with a layered structure, adding Co salt and 2-methylimidazole to grow ZIF-67 on an MXene lamella, and performing a series of treatment procedures including ultrasonic treatment, stirring, centrifuging, washing and vacuum drying treatment in the period so as to finally obtain the ZIF-67@MXene composite material. Benefited from the advantages of large specific surface area, adjustable porosity and the like of ZIF-67 and excellent electronic conductivity and surface hydrophilicity of MXene, the composite material is expected to be further improved in performance in an electrocatalysis process. In addition, the preparation method for the composite material is simple in process, low in cost and suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of material synthesis, and relates to a ZIF-67@MXene composite material and its preparation method and application. Background technique [0002] In recent years, with the rapid development of social economy, people's attention to energy and environmental issues continues to rise. It is well known that electrocatalysis is a promising approach for future clean energy conversion technologies, thus, the design of efficient electrocatalysts has become a research focus. At present, some hot materials have attracted extensive attention of research scholars. [0003] Metal-organic frameworks (MOFs), as an emerging functional material, are self-assembled by metal ions and organic ligands, and have the advantages of large specific surface area and tunable porosity, and have received extensive attention in the field of electrocatalysis. However, direct utilization of MOFs as efficient electrocatalysts is still challenging due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B1/27
CPCY02E60/50
Inventor 梁兴游刘安敏马廷丽李艳强高立国
Owner DALIAN UNIV OF TECH
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