3D composite having CNTs (carbon nanotubes) growing on Ti3C2 in situ and preparation method of 3D composite

A technology of in-situ growth and composite materials, which is applied in the field of titanium carbide in-situ growth of CNTs three-dimensional composite materials and its preparation, can solve the problem of high price, and achieve the effects of low equipment requirements, low cost and easy operation.

Active Publication Date: 2017-05-31
SHAANXI UNIV OF SCI & TECH
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  • Description
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  • Application Information

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Problems solved by technology

Yan et al. 3 C 2 Ti 3 C 2 Thin slices, the commercial CNTs were sonicated to obtain a stable suspension, and then the Ti 3 C 2 The flakes and CNTs were thoroughly mixed with different mass ratios by ultrasonic treatment, and then the mixture was filtered and dried to obtain Ti 3 C 2 / CNT composite materials; but the price of commercial CNTs is relatively high

Method used

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  • 3D composite having CNTs (carbon nanotubes) growing on Ti3C2 in situ and preparation method of 3D composite
  • 3D composite having CNTs (carbon nanotubes) growing on Ti3C2 in situ and preparation method of 3D composite
  • 3D composite having CNTs (carbon nanotubes) growing on Ti3C2 in situ and preparation method of 3D composite

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preparation example Construction

[0032] The preparation method of the present invention comprises the following steps:

[0033] (1) Ternary layered Ti 3 AlC 2 Preparation of ceramic powder;

[0034] Synthesize ternary layered Ti according to the method of patent ZL201310497696.9 3 AlC 2 The preparation steps of the ceramic powder specifically include: firstly, mixing the experimental raw materials TiC, Ti, and Al powder according to the molar ratio of TiC:Ti:Al=2.0:1.0:1.2; secondly, mixing the mixture, alumina balls Alumina and absolute ethanol are ball milled in a corundum ball milling tank according to the mass ratio of 1:3:1, in which absolute ethanol is used as a ball milling aid, alumina balls are used as a grinding medium, the speed of the ball mill is 300r / min, and the wet ball milling is 4h Finally, dry in a constant temperature drying oven at 40°C for 24 hours; then, put the dried mixture into a corundum crucible, and carry out vacuum pressureless sintering in a vacuum hot-pressed carbon tube fu...

Embodiment 1

[0042] First, 300mg of Ti 3 C 2 Add nano-powder into 200mL ultrapure water, ultrasonically disperse for 30min; then, add 0.29g Co(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 4 hours to complete the liquid phase reaction; secondly, add 6.0 g of urea, and continue to stir the above mixed solution at a constant temperature of 80°C to evaporate water to obtain a gray precursor; finally, grind the precursor powder with an agate mortar After thinning, it is transferred to an Ar atmosphere tube furnace for heat treatment, heated to 800 °C at a heating rate of 4 °C / min, pyrolyzed for 1 h, cooled to room temperature under the protection of Ar, and then taken out to obtain Ti 3 C 2 @CNTs 3D composites.

[0043] 50-200mg of Ti obtained in Step 3 3 C 2 @CNTs nanopowder is mixed with conductive carbon black and binder (PTFE) at a mass ratio of 80:15:5, and ground in an agate mortar for 10-15min to form a uniform mud. Secondly, roll the above mud into a thin film, cut it into ...

Embodiment 2

[0045] First, 300mg of Ti 3 C 2 Add nano-powder into 200mL ultrapure water, ultrasonically disperse for 30min; then, add 0.29g Co(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 4 hours; secondly, 6.0 g of urea was added, and the above mixed solution was continuously stirred at a constant temperature of 80 °C to evaporate water to obtain a gray precursor; finally, the precursor powder was ground with an agate mortar, and transferred to In an Ar atmosphere tube furnace, heat up to 900°C at a heating rate of 4°C / min, pyrolyze for 1 hour, cool to room temperature under the protection of Ar and take it out to obtain Ti 3 C 2 @CNTs 3D composites. figure 1 for the resulting Ti 3 C 2 @CNTs 6.0 SEM images and XRD images of the 3D composites. It can be seen that the dense CNTs are evenly distributed on the Ti 3 C 2 On both sides of the sheet, the specific surface area of ​​the layered material is significantly increased and the distance between the sheets is increased, mak...

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Abstract

The invention belongs to the technical field of preparation of nano functional materials and particularly relates to a 3D composite having CNTs (carbon nanotubes) growing on Ti3C2 in situ and a preparation method of the 3D composite. Firstly, Ti3C2 nano powder is added to ultrapure water to be dispersed uniformly, then Co(NO3)2.6H2O is added, and a liquid phase reaction is conducted; after the liquid phase reaction ends, urea is added to a reaction liquid, the mixture is continuously stirred at the constant temperature to evaporate moisture, and precursor powder is obtained, wherein the mass ratio of Ti3C2 nano powder to Co(NO3)2.6H2O to urea is (0.2-1.0): (0.1-0.4): (3.0-30.0); the precursor powder is ground fine and subjected to heat treatment, and the 3D composite having the CNTs growing on Ti3C2 in situ is obtained. Ti3C2 serves as a carrier, cobalt serves as a catalyst, urea serves as a carbon source, the 3D composite is prepared with a simple pyrolysis method, and the electrochemical performance of the Ti3C2 can be improved.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of preparation of nanometer functional materials, in particular to a three-dimensional composite material grown in situ on titanium carbide and a preparation method thereof. [0003] 【Background technique】 [0004] Recently, the discovery of a class of materials known as MXenes has expanded the family of 2D materials, namely transition metal carbides or carbonitrides, which are structurally similar to graphene. MXene materials can be obtained by removing the A-layer elements in the MAX phase by etching and keeping the original MX structure unchanged, such as Ti 3 C 2 、Ti 2 C et al. Due to its high conductivity, large specific surface area, multilayer structure, good chemical stability and environmental friendliness, MXene has great application potential in the fields of lithium-ion batteries, supercapacitors, photocatalysis and sensors. In the field of adsorption, Peng et al. showed that alkali m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/26H01G11/30H01G11/36H01M4/36H01M4/583C01B32/921C01B32/162B82Y30/00
CPCB82Y30/00C01P2002/72C01P2004/03C01P2004/61C01P2004/80H01G11/24H01G11/26H01G11/30H01G11/36H01G11/86H01M4/366H01M4/583Y02E60/10
Inventor 朱建锋李学林王雷秦毅武文玲吕文静卫丹王芬
Owner SHAANXI UNIV OF SCI & TECH
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