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NiO/MXene composite material as well as preparation method and application thereof

A composite material, mass ratio technology, applied in chemical instruments and methods, offensive equipment, explosives processing equipment, etc., can solve the problems affecting excellent characteristics, easy agglomeration particle size of nanomaterials, enlargement, etc., to improve catalytic activity and cost. The effect of low cost and simple preparation process

Active Publication Date: 2018-03-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanomaterials are easy to agglomerate to make the particle size larger, which affects its excellent properties.

Method used

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  • NiO/MXene composite material as well as preparation method and application thereof
  • NiO/MXene composite material as well as preparation method and application thereof
  • NiO/MXene composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: prepare MXene

[0029] Weigh 2gMAX (Ti 3 AlC 2 ) into a polytetrafluoroethylene beaker, slowly add 40ml of HF acid with a concentration of 40wt% into the beaker, then place the beaker in a water bath at 60°C, stir continuously for 18 hours, wash, centrifuge, and vacuum freeze-dry after the stirring 24h, get black powder MXene (Ti 3 C 2 )sample.

[0030] With the material prepared by MAX and embodiment 1, after scanning by X-ray diffractometer, see figure 1 , for Ti 3 AlC 2 and MXene;

[0031] With the material prepared by MAX and embodiment 1, after scanning electron microscope observation, see figure 2 , you can see the typical block structure of MAX, and the typical accordion-like structure of MXene;

Embodiment 2

[0032] Embodiment 2: prepare NiO / MXene composite material

[0033] (1) According to the method of Example 1, MXene (Ti 3 C 2 );

[0034] (2) 38mgNiSO 4 ·6H 2 O was placed in 30ml deionized water, then 0.2g of MXene prepared in step (1) was added, and mixed and stirred for 30min;

[0035] (3) Prepare 30ml of a solution containing 12mg of NaOH, and add it dropwise to the mixed solution in step (2), and keep stirring for 2h, then wash, centrifuge, and vacuum freeze-dry for 24h;

[0036] (4) Place the sample obtained in step (3) in a tube furnace, raise the temperature to 350°C at a rate of 5°C / min, and keep it warm for 2 hours to obtain a NiO / MXene composite material. The preparation process is as follows Figure 5 .

[0037] With the material prepared in embodiment 2, after X-ray diffractometer scanning, see figure 1 , is NiO / MXene composite material;

[0038] By the material prepared in embodiment 2, after scanning electron microscope observation, see figure 2 , it ca...

Embodiment 3

[0040] Embodiment 3: prepare NiO / MXene composite material

[0041] (1) According to the method of Example 1, MXene (Ti 3 C 2 );

[0042] (2) 78mgNiSO 4 ·6H 2 O was placed in 30ml deionized water, then 0.2g of MXene prepared in step (1) was added, and mixed and stirred for 30min;

[0043] (3) Prepare 30ml of a solution containing 24mg of NaOH, and add it dropwise to the mixed solution in step (2), and keep stirring for 2h, then wash, centrifuge, and vacuum freeze-dry for 24h;

[0044] (4) The sample obtained in step (3) was placed in a tube furnace, and the temperature was raised to 350 °C at a rate of 5 °C / min, and kept for 2 h to obtain a NiO / MXene composite material.

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Abstract

The invention discloses a NiO / MXene composite material as well as a preparation method and application thereof. The composite material takes MXene as a supporting carrier, and NiO particles are uniformly dispersed on the surface of MXene, wherein the mass ratio of NiO to MXene is (2.98-50):50. The preparation method comprises the following =steps: (1) etching a certain amount of MAX material intoa HF acid solution with certain concentration, so as to obtain an MXene material; (2) mixing and stirring a certain amount of nickel salt and the MXene obtained in the step (1) into a beaker while dropwise adding a NaOH solution with certain concentration, stirring for a period of time, then washing, centrifuging, and carrying out vacuum freeze drying; and (3) putting a mixture prepared in the step (2) into a tubular furnace, and calcining in nitrogen atmosphere, so that the target product is obtained. The NiO / MXene composite material is applied to thermal decomposition of ammonium perchlorate(AP) and shows better catalytic effect; meanwhile, preparation technology is simple, and the NiO / MXene composite material has a good application prospect.

Description

technical field [0001] The invention relates to a preparation method of a NiO / MXene composite material and its use for catalytic decomposition of ammonium perchlorate, which belongs to the field of material preparation and energetic materials. Background technique [0002] Ammonium perchlorate (AP) is the most common oxidizer component in composite solid propellants, accounting for about 60% of the total propellant. Therefore, the thermal decomposition behavior of ammonium perchlorate has a great influence on the performance of solid propellants, and the thermal decomposition behavior of ammonium perchlorate is measured by parameters such as thermal decomposition activation energy, thermal decomposition rate and pyrolysis temperature. Therefore, reducing the pyrolysis temperature of ammonium perchlorate is an important means to improve its thermal decomposition behavior, and adding catalyst is a very important strategy. Studies have shown that transition metal oxides and co...

Claims

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Application Information

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IPC IPC(8): C06B21/00C06B23/00C06B29/22C06D5/06B01J27/22
CPCC06B21/0091C06B23/002C06B29/22C06D5/06B01J27/22B01J35/396B01J35/50
Inventor 谈玲华吕静万夏舜赵海峰何朝铭
Owner NANJING UNIV OF SCI & TECH
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