Preparation method of titanium carbide hollow spheres

A technology of titanium carbide and hollow spheres is applied in the direction of titanium carbide and carbide, which can solve the problems of complex preparation process and achieve the effect of simple synthesis.

Active Publication Date: 2020-09-18
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The literature "MengqiangZhao, Yury Gogotsi; Advanced Materials, 2017, 29, 1702410" has reported using PMMA as a template to transform flake-like MXenes into hollow spheres and apply them to ano

Method used

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  • Preparation method of titanium carbide hollow spheres
  • Preparation method of titanium carbide hollow spheres
  • Preparation method of titanium carbide hollow spheres

Examples

Experimental program
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Example Embodiment

[0031] Example 1

[0032] Pour 40 mL of 9 M hydrochloric acid solution into a polytetrafluoroethylene beaker and start stirring, then add 2 g of lithium fluoride and continue stirring at room temperature for 30 minutes; add 2 g of Ti 3 AlC 2 The powder was slowly added to the above solution, and then continuously stirred and reacted at 35°C for 24 hours. The corrosion products are then centrifuged, and the supernatant is discarded. Then wash with deionized water by centrifugation for 6 times until the pH of the supernatant is 6; use anhydrous ethanol for 2 hours to intercalate the precipitate after centrifugation, and then centrifuge to pour out the ethanol. Then add deionized water to the sediment after the first centrifugation. After ultrasonic stripping, take the suspension again after centrifugation. Then add deionized water for ultrasonic stripping and then centrifuge to get the suspension. Take 5 times to get a small layer of titanium carbide nano Tablet dispersion. Dilut...

Example Embodiment

[0034] Example 2

[0035] Take 20 mL of 9 M hydrochloric acid solution into a polytetrafluoroethylene beaker and start stirring, then add 2 g of lithium fluoride and continue stirring at room temperature for 30 minutes; add 2 g of Ti 3 AlC 2 The powder was slowly added to the above solution, and then continuously stirred and reacted at 35°C for 24 hours. The corrosion products are then centrifuged, and the supernatant is discarded. Then centrifuge with deionized water to wash 5 times until the pH of the supernatant is 6; sonicate the precipitate after the centrifugation with absolute ethanol for 1 hour to intercalate, and then centrifuge to discard the ethanol. Then add deionized water to the sediment after the first centrifugation. After ultrasonic stripping, take the suspension again after centrifugation. Then add deionized water for ultrasonic stripping and then centrifuge to get the suspension. Take 5 times to get a small layer of titanium carbide nano Tablet dispersion. Di...

Example Embodiment

[0037] Example 3

[0038] Take 60 mL of 12 M hydrochloric acid solution into a polytetrafluoroethylene beaker and start stirring, then add 1 g of lithium fluoride and continue stirring at room temperature for 60 minutes; add 0.5 g of Ti 3 AlC 2 The powder was slowly added to the above solution, and then continuously stirred at 35°C for 24 hours. The corrosion products are then centrifuged, and the supernatant is discarded. Then centrifuged with deionized water to wash 5 times until the pH of the supernatant was 6; ultrasonicated with absolute ethanol for 1.5 hours to intercalate the precipitate after centrifugation, and then centrifuged to discard the ethanol. Then add deionized water to the sediment after the first centrifugation. After ultrasonic stripping, take the suspension again after centrifugation, add deionized water for ultrasonic stripping and then centrifuge to get the suspension. Take 8 times to get the few layers of titanium carbide nano Tablet dispersion. Dilute ...

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Abstract

The invention belongs to the technical field of preparation of nano functional materials, and particularly relates to a preparation method of titanium carbide hollow spheres, wherein the preparation method comprises the steps: immersing Ti3AlC2 powder in a lithium fluoride/hydrochloric acid solution, heating, stirring for a certain time, and centrifugally cleaning a precipitate with deionized water; carrying out ultrasonic treatment on the precipitate for intercalation by using absolute ethyl alcohol, and centrifuging by using deionized water to obtain a few-layer titanium carbide nanosheet dispersion liquid; and directly freezing the few-layer titanium carbide nanosheet dispersion liquid by using liquid nitrogen, and then carrying out freeze drying to obtain the titanium carbide hollow spheres. According to the method, Ti3AlC2 powder serves as a precursor to prepare the few-layer titanium carbide nanosheet dispersion liquid, then titanium carbide of different concentrations is rapidlyfrozen in liquid nitrogen, the titanium carbide hollow spheres are prepared through a freeze drying method, and the preparation method is a method used for preparing the titanium carbide hollow spheres through freeze drying.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano functional materials, in particular to a preparation method of titanium carbide hollow spheres. Background technique [0002] Transition metal carbides or carbon / nitride MXenes are a new class of 2D materials with a similar structure to graphene. MXenes are prepared by etching the A atomic layer in the MAX crystal by liquid-phase chemical method. In this way, the A-layer elements in the MAX phase can be removed, and the structure of MX can be kept unchanged, which has excellent catalytic and electrochemical properties. Compared with traditional two-dimensional materials, MXenes has metal-like conductivity, and the surface has abundant -F, -OH and other functional groups, which endows it with excellent chemical reactivity and has great prospects as a substrate material. [0003] For the new two-dimensional MXene nanomaterials, in the process of etching A atomic layer from the MAX cryst...

Claims

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Application Information

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IPC IPC(8): C01B32/921
CPCC01B32/921C01P2004/34C01P2006/40
Inventor 原长洲谭可刘洋侯林瑞
Owner UNIV OF JINAN
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