Aperture-controllable honeycomb three-dimensional porous MXene and general synthesis method thereof

A three-dimensional porous, synthetic method technology, applied in the field of nanomaterials, can solve the problems of reducing specific surface area, porosity and ion permeability, restricting efficient utilization of surface and interface, restricting application and processing performance, etc., to suppress stacking and agglomeration, Excellent processing characteristics and structural stability, effect with general purpose

A three-dimensional porous, synthetic method technology, applied in the field of nanomaterials, can solve the problems of reducing specific surface area, porosity and ion permeability, restricting efficient utilization of surface and interface, restricting application and processing performance, etc., to suppress stacking and agglomeration, Excellent processing characteristics and structural stability, effect with general purpose

CN110606487AInactive Publication Date: 2019-12-24DALIAN UNIV OF TECH
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  • Aperture-controllable honeycomb three-dimensional porous MXene and general synthesis method thereof
  • Aperture-controllable honeycomb three-dimensional porous MXene and general synthesis method thereof
  • Aperture-controllable honeycomb three-dimensional porous MXene and general synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1) Disperse MXene and polystyrene nanospheres with a particle size of 260nm in ethanol (the mass ratio of MXene to polystyrene nanospheres is 1:0.01), and ultrasonically disperse for 30min to prepare MXene concentration of 20mg mL -1 precursor solution.

[0026] 2) Utilize an ultrasonic atomizer to atomize the precursor solution obtained in step 1) into aerosol droplets with a size of about several microns.

[0027] 3) Ar gas is used as the carrier gas, and the carrier gas flow rate is 0.1L h -1 , the aerosol droplets obtained in step 2) were blown into a tube furnace with a preset temperature of 400 °C, and pyrolyzed for 1 min to obtain a honeycomb three-dimensional porous MXene structure. The obtained honeycomb three-dimensional porous MXene particle is a three-dimensional structure particle with an average size of about 3.5 μm, assembled by three-dimensional close cross-linking of MXene, and a honeycomb porous morphology with an inner diameter of 260 nm, and its spe...

Embodiment 2

[0029] 1) Disperse MXene and polystyrene nanospheres with a particle size of 430nm (the mass ratio of MXene to polystyrene nanospheres is 1:1) in water, and ultrasonically disperse for 30min to prepare MXene with a concentration of 10mg mL -1 precursor solution.

[0030] 2) Utilize an ultrasonic atomizer to atomize the precursor solution obtained in step 1) into aerosol droplets with a size of about several microns.

[0031] 3) Ar gas is used as the carrier gas, and the carrier gas flow rate is 2L h -1 , the aerosol micro-droplets mentioned in 2) were blown into a tube furnace with a preset temperature of 600°C for pyrolysis, and the pyrolysis time was 30s to obtain a honeycomb three-dimensional porous MXene structure. The obtained honeycomb three-dimensional porous MXene particle is a three-dimensional structure particle with an average size of about 3.5 μm, assembled by three-dimensional tight cross-linking of MXene, and a honeycomb porous morphology with an inner diameter ...

Embodiment 3

[0033] 1) Disperse MXene and polystyrene nanospheres with a particle size of 800nm ​​(the mass ratio of MXene to polystyrene nanospheres is 1:100) in water, and ultrasonically disperse for 60min to prepare MXene with a concentration of 0.5mg mL -1 precursor solution.

[0034] 2) Utilize an ultrasonic atomizer to atomize the MXene precursor solution obtained in step 1) into aerosol droplets with a size of about several microns.

[0035] 3) Ar gas is used as the carrier gas, and the carrier gas flow rate is 5L h -1 , the aerosol droplets obtained in step 2) were blown into a tube furnace with a preset temperature of 800°C for pyrolysis, and the pyrolysis time was 10s to obtain a honeycomb three-dimensional porous MXene structure. The obtained honeycomb three-dimensional porous MXene particle is a three-dimensional structure particle with an average size of about 3.5 μm, assembled by three-dimensional close cross-linking of MXene, and a honeycomb porous morphology with an inner ...

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Abstract

The invention discloses an aperture-controllable honeycomb three-dimensional porous MXene and a general synthesis method thereof, and belongs to the field of nano materials. According to the method, two-dimensional transition metal carbide MXene and a corresponding polymer template are used as precursors, and the honeycomb three-dimensional porous transition metal carbide with the controllable internal pore size is prepared through a spray pyrolysis technology. The honeycomb three-dimensional porous transition metal carbide prepared by the method is of a hierarchical porous three-dimensional structure formed by three-dimensional tight crosslinking of the two-dimensional MXene, the pore size is 260-800 nm, the pyrolysis time is extremely short, and the honeycomb three-dimensional porous transition metal carbide has excellent conductivity and has the specific surface area and pore volume far exceeding those of the two-dimensional MXene; the porosity and the ion permeability are greatly improved, so that an MXene surface interface is efficiently utilized, the application and processing properties of the MXene surface interface are improved, and the disclosed MXene has a wide application prospect in the fields of catalysis, energy, photoelectricity, space technology, war industry and the like.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and relates to a honeycomb three-dimensional porous MXene with controllable aperture and a general synthesis method thereof. Background technique [0002] Due to the size effect, nanomaterials have much better physical and chemical properties than macroscopic bulk materials, so they have attracted extensive attention. The performance of functional nanomaterials largely depends on their morphology, size, and crystal phase structure. It has become a hot field of scientific research on nanomaterials in recent years to fine-tune their microstructure to realize structural design and controllable construction. [0003] MXene is a new type of transition metal carbide or nitride two-dimensional crystal obtained by acid etching the MAX phase of layered ceramic materials. Its chemical formula is M n+1 x n , (n=1, 2, 3, M is a transition metal element, X is carbon or nitrogen). where Ti 3 C 2 As a kind of...

Claims

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Application Information

Patent Timeline
24 Dec 2019
Publication
CN110606487A
IPC
C01B32/90; C01B21/06
CPC
C01B21/06; C01P2004/61; C01P2006/12; C01P2006/14; C01P2006/16; C01B32/90
Inventors
王治宇; 修陆洋