Nano-palladium/carbon nanotube-MXene composite and application thereof to nitro-aromatic-type explosive detection

A carbon nanotube and composite material technology, applied in the field of explosives detection, can solve the problems of easy oxidation, easy stacking, easy agglomeration, etc., and achieves the effects of good stability, good selectivity and high detection efficiency

Active Publication Date: 2019-03-01

鑫瑞特检测技术(无锡)有限公司

2 Cites 15 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The new two-dimensional nanomaterial MXene has excellent physical and chemical properties similar to graphene, such as wide electrochemical activity window, high conductivity, excellent stability and mechanical properties, good dispersion performance, etc., making it suitable for lithium-ion batteries, It is widely used in supercapacitors, fuel cells, adsorption materials, electrochemical sensors and electronic devices, but it still has the disadvantages of being easily oxidized and stacked

As a one-dimensio...

Method used

The synthesized Pd NPs/CNT-MXene composite material of the present invention has shown good electrochemical sensing detection effect to nitro-explosives (as TNT, TNB, DNB, DNT, Cl-DNB), and its reason is that: (1) Few-layer MXene and CNT have excellent electrochemical active window, good conductivity and adsorption of nitroaromatic compounds; growing CNT on MXene can increase the dispersion of carbon nanotubes and avoid the dispersibility of ...

Abstract

The invention discloses a nano-palladium/carbon nanotube-MXene composite and application thereof to nitro-aromatic-type explosive detection. The Ti3C2Tx MXene surface is loaded with palladium nanoparticles, a carbon nanotube is grown on the MXene surface in a catalyzed mode through the palladium nanoparticles, and the diameter range of the carbon nanotube is 20-40 nm. According to the preparationsteps: a few layers of Ti3C2Tx MXene nano-sheets are provided; and the MXene nano-sheets are subjected to still standing in a solution containing a palladium precursor, and chemical vapor deposition (CVD) is conducted on the obtained Pd NPs/MXene composite. Application of the nano-palladium/carbon nanotube-MXene composite to nitro-aromatic-type explosive detection comprises the following steps: acomparison standard solution of a nitro-type explosive is subjected to gradient preparation; a glassy carbon electrode coated with nano-palladium/carbon nanotube-MXene is inserted into the prepared standard solution to be enriched; and taking a platinum wire as a counter electrode, an Ag/AgCl electrode as a reference electrode, and the glassy carbon electrode coated with the nano-palladium/carbonnanotube-MXene as a working electrode, a detection line and the linear range of the to-be-detected nitro-type explosive are obtained, and a detection method comprises cyclic voltammetry and a linear scanning voltammetry electrochemical method.

Application Domain

Material nanotechnologyMaterial analysis using wave/particle radiation +3

Technology Topic

Carbon nanotubeExplosive detection +12

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Examples

Experimental program(7)
Effect test(1)

Example Embodiment

[0036] Example 1

[0037] 1. Put 3.0 g Ti 3 AlC 2 Add 30 mL HF and stir at a constant speed for 120 h in a constant temperature water bath at 35 ºC. The product is washed with water to neutrality and dried in vacuum to obtain multilayer Ti 3 C 2 T x MXene nanosheet material;

[0038] 2. Add 2.0 g multi-layer MXene to 40 mL DMSO, stir at room temperature for 24 hours, centrifuge at 5000 rpm, and disperse the lower sediment in 500 mL ultrapure water, and sonicate it in an ultrasonic cleaner for 40 min in an ice bath. Low-speed centrifugation and freeze-drying of the upper layer are the few layers of MXene nanosheets;

[0039] 3. Disperse 10 mg of MXene in 30 mL of ultrapure water, sonicate for 30 min to disperse uniformly, and disperse 2 mg K 2 PdCl 4 Add to the solution, stir in an ice bath for 3 h, centrifuge and freeze-dry to obtain Pd NPs/MXene composite;

[0040] 4. Put the Pd NPs/MXene composite material in a tube furnace, in an atmosphere where the Ar2 flow rate is 100 sccm and the H2 flow rate is 15 sccm, the heating rate is 10 ºC/min to 600 ℃, and C2H2 is introduced. Pd NPs/CNT-MXene composite material is obtained by keeping the temperature at 7.5 sccm, keeping the temperature for 15 minutes, turning off C2H2 and H2 to cool down naturally.

Example Embodiment

[0041] Example 2

[0042] 1. Put 3.0 g Ti 3 AlC 2 Add 30 mL HF and stir at a constant speed for 120 h in a constant temperature water bath at 35 ºC. The product is washed with water to neutrality and dried in vacuum to obtain multilayer Ti 3 C 2 T x MXene nanosheet material;

[0043] 2. Add 2.0 g multi-layer MXene to 40 mL DMSO, stir at room temperature for 24 hours, centrifuge at 5000 rpm, and disperse the lower sediment in 500 mL ultrapure water, and sonicate it in an ultrasonic cleaner for 40 min in an ice bath. Low-speed centrifugation and freeze-drying of the upper layer are the few layers of MXene nanosheets;

[0044] 3. Disperse 10 mg of MXene in 30 mL of ultrapure water, sonicate for 30 min to disperse uniformly, and disperse 3 mg K 2 PdCl 4 Add to the solution, stir in an ice bath for 3 h, centrifuge and freeze-dry to obtain Pd NPs/MXene composite;

[0045] 4. Put the Pd NPs/MXene composite material in the tube furnace, in the Ar 2 Flow rate is 100 sccm, H 2 In an atmosphere with a flow rate of 15 sccm, the temperature rises to 600 ºC at a temperature rise rate of 10 ºC/min, and C is introduced 2 H 2 , The flow is 7.5 sccm, keep warm for 15 min, close C 2 H 2 And H 2 Naturally cool down to obtain Pd NPs/CNT-MXene composite material.

Example Embodiment

[0046] Example 3

[0047] 1. Put 3.0 g Ti 3 AlC 2 Add 30 mL HF and stir at a constant speed for 120 h in a constant temperature water bath at 35 ºC. The product is washed with water to neutrality and dried in vacuum to obtain multilayer Ti 3 C 2 T x MXene nanosheet material;

[0048] 2. Add 2.0 g multi-layer MXene to 40 mL DMSO, stir at room temperature for 24 hours, centrifuge at 5000 rpm, and disperse the lower sediment in 500 mL ultrapure water, and sonicate it in an ultrasonic cleaner for 40 min in an ice bath. Low-speed centrifugation and freeze-drying of the upper layer are the few layers of MXene nanosheets;

[0049] 3. Disperse 15 mg of MXene in 30 mL of ultrapure water, sonicate for 30 min to disperse uniformly, and disperse 2 mg K 2 PdCl 4 Add to the solution, stir in an ice bath for 3 h, centrifuge and freeze-dry to obtain Pd NPs/MXene composite;

[0050] 4. Put the Pd NPs/MXene composite material in the tube furnace, in the Ar 2 Flow rate is 100 sccm, H 2 In an atmosphere with a flow rate of 15 sccm, the temperature rises to 600 ºC at a temperature rise rate of 10 ºC/min, and C is introduced 2 H 2 , The flow is 7.5 sccm, keep warm for 15 min, close C 2 H 2 And H 2 Naturally cool down to obtain Pd NPs/CNT-MXene composite material.

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Classification and recommendation of technical efficacy words

good stability
Easy to prepare

Nano-palladium/carbon nanotube-MXene composite and application thereof to nitro-aromatic-type explosive detection

A carbon nanotube and composite material technology, applied in the field of explosives detection, can solve the problems of easy oxidation, easy stacking, easy agglomeration, etc., and achieves the effects of good stability, good selectivity and high detection efficiency

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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