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Preparation method of delaminated two-dimensional transition metal carbide or carbonitride-trititanium dicarbide with improved antibacterial property

An antibacterial and solution technology, applied in the field of preparation of MXene-Ti3C2, can solve the problems of unsatisfactory layering effect, low antibacterial properties, and restricting the development of antibacterial materials, and achieve good layering effect, improve antibacterial properties, and antibacterial properties. strong effect

Active Publication Date: 2018-09-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the layered MXene-Ti prepared by these two methods 3 C 2 The delamination effect is not ideal, and the antibacterial property is not high, which limits its further development as an antibacterial material

Method used

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  • Preparation method of delaminated two-dimensional transition metal carbide or carbonitride-trititanium dicarbide with improved antibacterial property
  • Preparation method of delaminated two-dimensional transition metal carbide or carbonitride-trititanium dicarbide with improved antibacterial property
  • Preparation method of delaminated two-dimensional transition metal carbide or carbonitride-trititanium dicarbide with improved antibacterial property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) 5g Ti 3 AlC 2 -MAX phase ceramic powder was slowly added to 100mL of HF solution with a mass concentration of 49% to obtain an intermediate solution;

[0054] (2) reacting the intermediate solution obtained in step (1) in a magnetic stirrer at 50° C. in an oil bath for 36 hours;

[0055] (3) After the reaction, the obtained solution was evenly divided into 6 parts and poured into 6 centrifuge bottles of 350mL, and distilled water was added to 2 / 3 of the place, shaken and centrifuged at 3500rpm for 5min, and the supernatant was tested. Pour out the supernatant after the pH value, and wash the precipitate with deionized water, shake it well and then centrifuge under the same conditions, repeat 6 times; measure the pH of the final supernatant = 5.6, and then wash the precipitate with absolute ethanol , centrifuge after shaking, keep the same rotation speed and centrifugation time and repeat twice;

[0056] (4) Completely disperse and suspend the obtained precipitate...

Embodiment 2

[0066] MXene-Ti 3 C 2 The powder preparation method is the same as in Example 1.

[0067] (1) 1g MXene-Ti 3 C 2 The powder is uniformly dispersed in 100ml of isopropylamine (IPA) aqueous solution with a volume concentration of 25%, and stirred and reacted for 18h at 25°C in a magnetic stirrer;

[0068] (2) After the reaction, centrifuge the obtained solution at a speed of 3500rpm for 15min, discard the supernatant, wash the precipitate with deionized water, oscillate and shake well, and then centrifuge under the same conditions, repeating 2 times;

[0069](3) uniformly disperse the obtained precipitate in 500ml deionized water, and perform ultrasonic treatment (100% power and 45k Hz frequency) under argon gas for 6h;

[0070] (4) Pour the ultrasonically treated solution evenly into a watch glass, and dry it in a vacuum oven for 24 hours at room temperature to obtain a layered MXene-Ti with improved antibacterial properties. 3 C 2 Material

[0071] The prepared layered M...

Embodiment 3

[0076] Hierarchical MXene-Ti provided as embodiment 1 3 C 2 , the difference is that 80 mL of HF solution with a mass concentration of 49% is added in the step (1), the temperature of the stirring reaction in the step (1) is 40° C., and the time of the stirring reaction is 36 h, and the step (2) The rotating speed of the washing centrifuge is 2500rpm, the temperature of the stirring reaction in the step (3) is 20°C, the time of the stirring reaction is 18h, the frequency of the ultrasonic treatment in the step (4) is 40kHz, and the power of the ultrasonic treatment is 100 %, MXene-Ti will be used in step (5) 3 C 2 The powder is evenly dispersed in 80ml of hydrazine hydrate.

[0077] The prepared layered MXene-Ti 3 C 2 The layer spacing and lattice constant of the material are shown in Table 2; the layered MXene-Ti 3 C 2 The antibacterial activity of MXene-Ti was significantly higher than that of unlayered MXene-Ti 3 C 2 , and showed time and concentration dependence, ...

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Abstract

The invention discloses a preparation method of delaminated MXene-Ti3C2 with improved antibacterial property. The preparation method comprises the following steps of (1) mixing a Ti3AlC2-MAX-phase ceramic powder and an HF (hydrogen fluoride) solution, stirring the obtained mixed solution to react under the oil bath condition, and finishing the reaction, so as to obtain an intermediate solution; (2) washing and centrifuging the intermediate solution by deionized water until the pH (potential of hydrogen) value of a supernatant is 5 to 6; continuing to wash by ethyl alcohol, and centrifuging, soas to obtain a precipitate; drying, so as to obtain the MXene-Ti3C2 powder; (3) uniformly mixing and stirring the obtained MXene-Ti3C2 powder in step (2), and hydrazine hydrate or isopropylamine solution, and stirring to react, so as to obtain an intermediate solution; (4) treating the obtained intermediate solution in step (3) by ultrasonic waves, filtering the solution after ultrasonic treatment by a filter membrane, and drying, so as to obtain the delaminated MXene-Ti3C2 with improved antibacterial property. The preparation method of the delaminated MXene-Ti3C2 with improved antibacterialproperty has the advantages that the preparation and delaminating of the MXene-Ti3C2 can be realized, and the prepared delaminated MXene-Ti3C2 has an improved antibacterial property.

Description

technical field [0001] The present invention relates to MXene-Ti 3 C 2 field of preparation, specifically a layered MXene-Ti with improved antimicrobial properties 3 C 2 method of preparation. Background technique [0002] With the rapid development of nanomaterials, more and more nanomaterials have been discovered and applied in various fields, including medical equipment, water treatment, food packaging and textile industry and other public health applications, antibacterial nanomaterials Materials have been extensively studied. After graphene was successfully synthesized in 2004, due to its good physical and chemical properties, it has made great progress in various fields, and its application requirements are getting higher and higher. Existing studies have shown that graphene has certain antibacterial properties, so there has been an upsurge of research on two-dimensional nano-antibacterial materials. [0003] MXene-Ti 3 C 2 As a new type of two-dimensional tran...

Claims

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Application Information

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IPC IPC(8): C01B32/921
CPCC01B32/921C01P2004/20C01P2004/64
Inventor 林道辉克里斯哈拉莫斯·拉贾威尔沈书怡
Owner ZHEJIANG UNIV
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