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A gold-embedded carbon nanotube grafted ferrocene polymer nanocomposite electrochemical sensing material and its preparation method and application

A technology of nanocomposite materials and carbon nanotubes, which is applied in the field of nanocomposite materials and functional materials, can solve problems such as difficult food safety detection, and achieve the effects of effective and reliable food safety detection, fast electron transmission characteristics, and strong absorption performance

Active Publication Date: 2019-10-25
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, there are still some difficulties in food safety testing

Method used

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  • A gold-embedded carbon nanotube grafted ferrocene polymer nanocomposite electrochemical sensing material and its preparation method and application
  • A gold-embedded carbon nanotube grafted ferrocene polymer nanocomposite electrochemical sensing material and its preparation method and application
  • A gold-embedded carbon nanotube grafted ferrocene polymer nanocomposite electrochemical sensing material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Preparation of MWCNTs@Au nanocomposites

[0041] Add 0.2g MWCNTs into 40mL of acetone, sonicate for 30 minutes at room temperature, filter with suction, dry in vacuum at 80°C for 24 hours, then add 1.0mol / L NaOH aqueous solution, sonicate for 30 minutes, soak for 5 hours, filter with suction, and use deionized water Rinse until neutral, vacuum dry at 80°C for 24 hours, then ultrasonicate with 50mL HF aqueous solution with a mass concentration of 5% for 30 minutes, then continuously stir for 8 hours, filter with suction, rinse with deionized water until neutral, then vacuum at 80°C After drying for 24 hours, modified MWCNTs were obtained. 0.05 g of modified MWCNTs was ultrasonically dispersed in 92 mL of deionized water for 1 hour, and 40 mL of 1% HAuCl was added 4 ·3H 2 O aqueous solution and 20mL0.05mol / L trisodium citrate dihydrate aqueous solution, while stirring, quickly add 12mL0.1mol / L NaBH 4 Aqueous solution, it can be seen that the solution turns wine red ...

Embodiment 2

[0050] 1. Preparation of MWCNTs@Au nanocomposites

[0051] MWCNTs were modified according to the method described in Example 1. 0.05 g of modified MWCNTs was ultrasonically dispersed in 92 mL of deionized water for 1 hour, and 10 mL of 1% HAuCl was added 4 ·3H 2 O aqueous solution and 5mL 0.05mol / L trisodium citrate dihydrate aqueous solution, while stirring, quickly add 3mL 0.1mol / L NaBH 4 Aqueous solution, it can be seen that the solution quickly turns into wine red. After the dropwise addition, the stirring is continued at room temperature for 24 hours, the lower sediment is collected by centrifugation, and dried at 80°C to obtain MWCNTs@Au nanocomposites with a yield of 75%. The particle size of the Au nanoparticles in the composite material is 7-15nm, and the mass content of Au is 41.9%.

[0052] 2. Preparation of atom transfer radical polymerization initiator

[0053] Add 0.05g MWCNTs@Au nanocomposite material into 50mL deionized water, ultrasonically disperse for 30...

Embodiment 3

[0058] 1. Preparation of MWCNTs@Au nanocomposites

[0059] MWCNTs were modified according to the method described in Example 1. 0.05 g of modified MWCNTs was ultrasonically dispersed in 92 mL of deionized water for 1 hour, and 20 mL of 1% HAuCl was added 4 ·3H 2 O aqueous solution and 10mL 0.05mol / L trisodium citrate dihydrate aqueous solution, while stirring, quickly add 6mL 0.1mol / L NaBH 4 Aqueous solution, it can be seen that the solution turns wine red rapidly. After the dropwise addition, the stirring is continued at room temperature for 24 hours, the lower sediment is collected by centrifugation, and dried at 80°C to obtain MWCNTs@Au nanocomposites with a yield of 73%. The particle size of the Au nanoparticles in the composite material is 7-15nm, and the mass content of Au is about 58.4%.

[0060] 2. Preparation of atom transfer radical polymerization initiator

[0061] Add 0.05g MWCNTs@Au nanocomposite to 50mL deionized water, ultrasonically disperse for 30 minutes,...

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Abstract

The invention discloses a carbon nanotube grafted ferrocene polymer nano composite electrochemical sensing material inlaid with gold and a preparation method and an application thereof. The sensing material is composed of a carbon nanotube with excellent electrochemical property, gold nanoparticles and polyferrocene ethyl formyl methacrylate with redox response. The preparation process relates tomodification, complexing and esterification of the gold nanoparticles on the surface of the carbon nanotube and grafting of a ferrocenyl polymer to the surface of the carbon nanotube inlaid with goldthrough atom transfer radical polymerization. The sensing material can be used as an electrode modification material; an electrochemical sensing film which is excellent in electrochemical property, good in electrochemical sensitivity, reversibility, repeatability, wide linear range and low detection limit can be obtained by regulating the system composition and the grafting rate. The electrode modification material can be used for simple, quick, accurate, effective and reliable food safety detection.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials and functional materials, and in particular relates to a gold-embedded carbon nanotube grafted ferrocene polymer sensing material and a preparation method and application thereof. Background technique [0002] Food is the material basis for human survival and development. It provides energy and nutrition for human to maintain life, grow and develop, and engage in various activities. However, with the development of modern industry and agriculture, the living environment of human beings has been polluted and destroyed, and the pollution of toxic and harmful substances has gradually intensified, endangering human health and life safety. Food additives and organophosphorus pesticides (OPPs) are two typical toxic and harmful substances, among which trichlorfon and melamine are the most common OPPs and food additives. Their accumulation in the environment and food can cause direct or p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 罗延龄魏雪鹏张瑞乾徐峰陈亚芍
Owner SHAANXI NORMAL UNIV
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