AuNPs-p-Ti3C2Tx composite material as well as preparation method and application thereof

A technology of aunps-p-ti3c2tx, composite materials, applied in nanotechnology for materials and surface science, material electrochemical variables, electrolytic coatings, etc., can solve the problem of low sensor conductivity, long analysis time, and complicated measurement problems, to achieve the effect of high specific surface area, accurate and rapid detection, and controllable nano-layer thickness

Active Publication Date: 2021-11-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently constructed biogenic amine sensors only detect a single target, and the determination of the sum of multiple biogenic amines is c...

Method used

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  • AuNPs-p-Ti3C2Tx composite material as well as preparation method and application thereof
  • AuNPs-p-Ti3C2Tx composite material as well as preparation method and application thereof
  • AuNPs-p-Ti3C2Tx composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: AuNPs-p-Ti 3 C 2 T X Preparation of composite materials

[0039] (1) p-Ti 3 C 2 T x Preparation of:

[0040] Add 2.0 g Ti to 30 mL of 40% HF solution 3 AlC 2 powder, stirred continuously at 25°C for 24 h; the precipitate obtained by centrifugation was repeatedly washed with pure water until the pH value of the washing liquid was 6.0; then the obtained precipitate was vacuum-dried at 30°C for 24 h to obtain Ti 3 C 2 T x powder.

[0041] Take 1.0 g Ti 3 C 2 T x The powder was dispersed in 250 mL of pure water, and after sonication for 1 h, the suspension was centrifuged at 10,000 rpm for 15 min and the supernatant was collected. Take 80 mL supernatant and 80 mL 0.2 mol / L CuSO 4 Mix well, and stir continuously at room temperature for 30 min; centrifuge to obtain a precipitate, wash with pure water repeatedly until the pH of the washing solution is 6.0, then add 40 mL of 5% HF and let it stand for 10 min. Finally, the precipitate was obtained by c...

Embodiment 2

[0050] Embodiment 2: Based on AuNPs-p-Ti 3 C 2 T x Fabrication of Bimolecular Imprinted Sensors from Composite Materials

[0051] Figure 6 For AuNPs-p-Ti based 3 C 2 Tx Schematic diagram of the bimolecularly imprinted sensor and the electrochemical detection of cadaverine and putrescine, which is based on AuNPs-p-Ti 3 C 2 T x The preparation method of the bimolecularly imprinted sensor such as Figure 6 Shown:

[0052] Take 20 μL of the composite material AuNPs-p-Ti obtained in Example 1 3 C 2 T x Drop-coated on the screen-printed electrode (SPCE), and dried by an infrared lamp for 3-5 minutes to obtain a highly conductive sensing interface AuNPs-p-Ti 3 C 2 T x / SPCE; then AuNPs-p-Ti 3 C 2 T x / SPCE immersed in 0.1 mol / L PBS solution (pH8.0) containing cadaverine template, putrescine template and functional monomer (MAA), the molar ratio of the three is 1:1:1~7; The safety method (CV) scans 5-30 cycles to build a MIP layer on the electrode surface, the poten...

Embodiment 3

[0056] In this example, in order to increase the response current, the molar ratio of cadaverine, putrescine and functional monomer MAA was optimized to prepare a MIP film.

[0057] Figure 8 is an optimized graph of the molar ratio between the dual-template molecules (cadaverine and putrescine) and the functional monomer, from Figure 8 It can be seen that when the molar ratio of the three is in the range of 1:1:1~1:1:5, the current response gradually increases, which helps to form more imprinted cavities, and the molar ratio exceeds 1:1: At 5 o'clock, the response current drops because the formed electron channel is covered by excess monomer. Therefore, in this embodiment, the molar ratio of cadaverine, putrescine template and MAA is 1:1:5 to establish the sensor.

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Abstract

The invention provides an AuNPs-p-Ti3C2Tx composite material as well as a preparation method and application thereof, and belongs to the technical field of composite material preparation, sensor preparation and meat product quality detection. According to the invention, the AuNPs-p-Ti3C2Tx composite material is firstly prepared, then the bimolecular imprinting sensor is prepared based on the composite material, the bimolecular imprinting sensor is easy and convenient to operate, rapid and sensitive, excellent in selectivity, high in stability and extremely low in detection limit, the sum of the content of cadaverine and the content of putrescine can be detected at the same time, and the bimolecular imprinting sensor has good application in evaluation of pork freshness.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, sensor preparation and meat product quality detection, and specifically relates to an AuNPs-p-Ti 3 C 2 T x Composite materials and their preparation methods and applications. Background technique [0002] During the production and processing of meat products, they are extremely susceptible to microbial contamination, which decomposes nutrients, leads to spoilage of meat products, and changes in sensory quality, physical and chemical properties. Eating spoiled meat products can be very harmful to human health and may cause illness or even death. High levels of biogenic amines (BAs) can be detected during the spoilage process of meat products, so they are often used as indicators for evaluating product freshness. Cadaverine and putrescine are characteristic markers of pork spoilage. The freshness of pork products can be evaluated by measuring the biogenic amine index (BAI...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30C25D13/06C25D13/12C25D13/22B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCG01N27/26G01N27/30C25D13/04C25D13/12C25D13/22B22F9/24B82Y30/00B82Y40/00
Inventor 孙宗保刘小裕张新爱邹小波牛增潘浩东李君奎高云龙
Owner JIANGSU UNIV
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