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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
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  • Abstract
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  • Claims
  • Application Information

AI 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-dimensional nanomaterial, carbon nanotube (CNT) is light in weight, perfectly connected in hexagonal structure, and has many excellent mechanical, electrical and chemical properties, such as huge specific surface area, good mechanical properties, excellent electrical conductivity and Good adsorption performance, etc., but it has the disadvantages of easy agglomeration and difficult dispersion; palladium nanoparticles (Pdnanoparticles, Pd NPs) can efficiently catalyze the conversion of nitro groups into amino groups

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Add 3.0 g Ti 3 AlC 2 Added to 30 mL HF, stirred at a constant speed for 120 h under a constant temperature water bath at 35 ºC, washed the product with water until neutral and dried in vacuum to obtain multilayer Ti 3 C 2 T x MXene nanosheet material;

[0038] 2. Add 2.0 g of multi-layer MXene into 40 mL of DMSO, stir at a constant speed for 24 h at room temperature, centrifuge at 5000 rpm at high speed and disperse the lower sediment in 500 mL of ultrapure water, and ultrasonicate for 40 min in an ice bath in an ultrasonic cleaner. Low-speed centrifugation to take the upper layer and freeze-dry to obtain few-layer MXene nanosheets;

[0039] 3. Disperse 10 mg MXene in 30 mL ultrapure water, disperse evenly by ultrasonication for 30 min, and dissolve 2 mg K 2 PdCl 4 Added into the solution, stirred in ice bath for 3 h, centrifuged and freeze-dried to obtain Pd NPs / MXene composite material;

[0040] 4. Put the Pd NPs / MXene composite in a tube furnace, in an atm...

Embodiment 2

[0042] 1. Add 3.0 g Ti 3 AlC 2 Added to 30 mL HF, stirred at a constant speed for 120 h under a constant temperature water bath at 35 ºC, washed the product with water until neutral and dried in vacuum to obtain multilayer Ti 3 C 2 T x MXene nanosheet material;

[0043] 2. Add 2.0 g of multi-layer MXene into 40 mL of DMSO, stir at a constant speed for 24 h at room temperature, centrifuge at 5000 rpm at high speed and disperse the lower sediment in 500 mL of ultrapure water, and ultrasonicate for 40 min in an ice bath in an ultrasonic cleaner. Low-speed centrifugation to take the upper layer and freeze-dry to obtain few-layer MXene nanosheets;

[0044] 3. Disperse 10 mg MXene in 30 mL ultrapure water, disperse evenly by ultrasonication for 30 min, and dissolve 3 mg K 2 PdCl 4 Added into the solution, stirred in ice bath for 3 h, centrifuged and freeze-dried to obtain Pd NPs / MXene composite material;

[0045] 4. Put the Pd NPs / MXene composite in a tube furnace under Ar ...

Embodiment 3

[0047] 1. Add 3.0 g Ti 3 AlC 2 Added to 30 mL HF, stirred at a constant speed for 120 h under a constant temperature water bath at 35 ºC, washed the product with water until neutral and dried in vacuum to obtain multilayer Ti 3 C 2 T x MXene nanosheet material;

[0048] 2. Add 2.0 g of multi-layer MXene into 40 mL of DMSO, stir at a constant speed for 24 h at room temperature, centrifuge at 5000 rpm at high speed and disperse the lower sediment in 500 mL of ultrapure water, and ultrasonicate for 40 min in an ice bath in an ultrasonic cleaner. Low-speed centrifugation to take the upper layer and freeze-dry to obtain few-layer MXene nanosheets;

[0049] 3. Disperse 15 mg MXene in 30 mL ultrapure water, disperse evenly by ultrasonication for 30 min, and dissolve 2 mg K 2 PdCl 4 Added into the solution, stirred in ice bath for 3 h, centrifuged and freeze-dried to obtain Pd NPs / MXene composite material;

[0050] 4. Put the Pd NPs / MXene composite in a tube furnace under Ar ...

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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.

Description

technical field [0001] The invention relates to the field of explosive detection, in particular to a nano-palladium / carbon nanotube-MXene composite material and its application in the detection of nitroaromatic explosives. Background technique [0002] With the development of society, people pay more and more attention to homeland security, human health and green environment. The detection of explosive residues and explosive analogs has become a hot spot of widespread concern at home and abroad, and has become an important means to deal with terrorist threats, soil and groundwater pollution, etc. Therefore, the rapid, sensitive and selective detection of explosives and their analogs Analysis is one of the areas of greatest concern to the analytical chemistry community and society. According to the classification of chemical properties, explosives can be divided into nitroaromatics, nitrates, diazonium salt compounds and peroxides. Among them, nitro explosives, such as 2,4,...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/30G01N23/2251B82Y30/00B82Y15/00C06B23/00
CPCB82Y15/00B82Y30/00C06B23/00G01N23/2251G01N27/308G01N27/48
Inventor 孙义民曾伟孙贺雷
Owner 鑫瑞特检测技术(无锡)有限公司
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