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Composite hollow nanosphere of MXene and carbon nanotube as well as autocatalytic preparation method and application thereof

A hollow nano, carbon nanotube technology, applied in chemical instruments and methods, carbide, titanium carbide, etc., can solve the problems of easy agglomeration and difficult dispersion.

Active Publication Date: 2020-11-06
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to their ultra-high mechanical properties, thermal stability, specific surface area, and electrochemical properties, these properties make carbon nanotubes have broad prospects for applications in catalysis, supercapacitors, gas sensors, and chemical separation and detection. Easy to reunite, difficult to disperse

Method used

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  • Composite hollow nanosphere of MXene and carbon nanotube as well as autocatalytic preparation method and application thereof
  • Composite hollow nanosphere of MXene and carbon nanotube as well as autocatalytic preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The method for preparing MXene-CNT hollow nanospheres by self-catalysis comprises the following steps:

[0029] (1) Add 2g of melamine and 2mL of formaldehyde into 100mL of water, heat up to 80°C, after the solution is clarified, add 0.54g of PVA, and then add 0.21g of citric acid after the PVA is completely dissolved, react for 10min, and perform 3 times of washing-centrifugation After the process (3000rpm, 5min each time), collect the lower precipitate and dry to obtain MF microsphere powder;

[0030] (2) Add 20 mL of HCl with a concentration of 9 mol / L and 1 g of LiF into the beaker, and turn on the stirring device. Then slowly add 2g Ti while stirring 3 AlC 2 , After the addition was complete, it was stirred at room temperature for 108 h to obtain the MXene phase. Ultrasonic stripping, followed by repeated washing-centrifugation process, until the pH value of the solution is equal to 6, then centrifuged at 4500rpm, the supernatant is collected, filtered, and drie...

Embodiment 2

[0035] The method for preparing MXene-CNT hollow nanospheres by self-catalysis comprises the following steps:

[0036] (1) Add 2g of melamine and 2mL of formaldehyde into 100mL of water, heat up to 80°C, after the solution is clarified, add 0.54g of PVA, and then add 0.21g of citric acid after the PVA is completely dissolved, react for 10min, and perform 3 times of washing-centrifugation After the process (3000rpm, 5min each time), collect the lower precipitate and dry to obtain MF microsphere powder;

[0037] (2) Add 20 mL of HCl with a concentration of 9 mol / L and 2 g of LiF into the beaker, and turn on the stirring device. Then slowly add 1g Ti while stirring 3 AlC 2 , After the addition was complete, it was stirred at room temperature for 108 h to obtain the MXene phase. Ultrasonic stripping, followed by repeated washing-centrifugation process, until the pH value of the solution is equal to 6, then centrifuged at 4500rpm, the supernatant is collected, filtered, and drie...

Embodiment 3

[0042] The method for preparing MXene-CNT hollow nanospheres by self-catalysis comprises the following steps:

[0043] (1) Add 2g of melamine and 2mL of formaldehyde into 100mL of water, heat up to 80°C, after the solution is clarified, add 0.54g of PVA, and then add 0.21g of citric acid after the PVA is completely dissolved, react for 10min, and perform 3 times of washing-centrifugation After the process (3000rpm, 5min each time), collect the lower precipitate and dry to obtain MF microsphere powder;

[0044] (2) Add 20 mL of HCl with a concentration of 9 mol / L and 1 g of LiF into the beaker, and turn on the stirring device. Then slowly add 2g Ti while stirring 3 AlC 2 , After the addition was complete, it was stirred at room temperature for 108 h to obtain the MXene phase. Ultrasonic stripping, followed by repeated washing-centrifugation process, until the pH value of the solution is equal to 6, then centrifuged at 4500rpm, the supernatant is collected, filtered, and drie...

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Abstract

The invention relates to the field of nano composite materials, in particular to an MXene and carbon nanotube composite hollow nanosphere as well as an autocatalytic preparation method and applicationthereof. The method comprises the following steps: taking positively charged melamine formaldehyde resin (MF) microspheres as a template; coating the MF microspheres with negatively charged MXene nanosheets through electrostatic interaction; preparing melamino-formaldehyde resin and MXene composite nano microspheres, loading cobalt ions onto the melamino-formaldehyde resin and MXene composite nano microspheres by using an impregnation method, and finally calcining at high temperature to remove the melamino-formaldehyde resin, thereby obtaining the MXene and carbon nanotube composite hollow nano spheres. In the high-temperature calcination process, cobalt nanoparticles are used as a catalyst for an MF decomposition product, and carbon nanotubes are generated through a chemical vapor deposition method, so that the MXene-CNT hollow nanospheres are obtained.

Description

technical field [0001] The invention relates to the field of nanocomposite materials, in particular to a composite hollow nanosphere of MXene and carbon nanotubes and its self-catalyzed preparation method and application. Background technique [0002] MXene is a new type of two-dimensional nanomaterial, which is obtained by selectively etching the three-dimensional layered compound MAX (where M represents an early transition metal element, A represents the main group elements III and IV, and X represents carbon or nitrogen). A atomic layer is obtained. MXene has a huge specific surface area and other excellent properties, so it has great potential in electrochemical applications, but its electrochemical performance has not been fully developed, the main reason is that MXene has a huge surface energy, Therefore, the stacking phenomenon is very easy to occur between the sheets, which reduces its specific surface area and severely limits its electrochemical performance. [00...

Claims

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Application Information

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IPC IPC(8): C01B32/162C01B32/921B82Y40/00B82Y30/00B01J27/22B01J23/75B01J21/18B01J35/08
CPCC01B32/162C01B32/921B82Y40/00B82Y30/00B01J27/22B01J23/75B01J21/185C01P2004/80C01P2004/34B01J35/23B01J35/33B01J35/51
Inventor 孙义民李厚燊
Owner WUHAN INSTITUTE OF TECHNOLOGY
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