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A preparation method of chitosan-graphene/gold nanoparticles@carbon nanotube ion imprinted sensor

A technology of gold nanoparticles and carbon nanotubes, which is applied in the direction of instruments, scientific instruments, and electrochemical variables of materials, etc., to achieve excellent anti-interference ability, simple production, and fast response

Active Publication Date: 2020-02-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, simply modifying the matrix does not fundamentally solve this problem, so the study of a new type of electrochemical sensor with high sensitivity, fast quantitative analysis, low cost and strong anti-interference ability has broad application prospects.

Method used

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  • A preparation method of chitosan-graphene/gold nanoparticles@carbon nanotube ion imprinted sensor
  • A preparation method of chitosan-graphene/gold nanoparticles@carbon nanotube ion imprinted sensor
  • A preparation method of chitosan-graphene/gold nanoparticles@carbon nanotube ion imprinted sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Soak the three-neck flask with aqua regia, rinse the flask with a large amount of deionized water, rinse it with ultrapure water for 3 times, and dry it upside down. Place 100mL chloroauric acid solution (0.02wt.%) in a 250mL three-necked flask, stir magnetically, heat and boil for 10min until the solution is yellowish brown, then add 5mL 2wt.% sodium citrate solution to the boiling solution, and the solution Become dark blue, continue to boil 10min, solution color becomes lighter gradually, stop heating then, obtain wine red nano-gold solution after room temperature cooling, the gold nano-particle that makes is spherical, diameter 10-20nm ( figure 2 a);

[0034] (2) Use Al 2 o 3 The powder was mechanically polished to a smooth mirror surface, and then ultrasonically cleaned with double distilled water for 3 min each time, repeated three times. The cleaned electrodes were ultrasonically cleaned with absolute ethanol and twice distilled water for 5 min, and dried...

Embodiment 2

[0038] (1) Soak the three-neck flask with aqua regia, rinse the flask with a large amount of deionized water, rinse it with ultrapure water for 3 times, and dry it upside down. Place 100mL chloroauric acid solution (0.02wt.%) in a 250mL three-necked flask, stir magnetically, heat and boil for 10min until the solution is yellowish brown, then add 5mL 2wt.% sodium citrate solution to the boiling solution, and the solution Turn into dark blue, continue to boil for 10min, the color of the solution gradually becomes lighter, then stop heating, and obtain a wine-red nano-gold solution after cooling at room temperature. The prepared gold nanoparticles are spherical, with a diameter of 10-20nm ( figure 2 a).

[0039] (2) Use Al 2 o 3 The powder was mechanically polished to a smooth mirror surface, and then ultrasonically cleaned with double distilled water for 3 min each time, repeated three times. The cleaned electrodes were ultrasonically cleaned with absolute ethanol and twice...

Embodiment 3

[0043] (1) Soak the three-neck flask with aqua regia, rinse the flask with a large amount of deionized water, rinse it with ultrapure water for 3 times, and dry it upside down. Place 100mL chloroauric acid solution (0.02wt.%) in a 250mL three-necked flask, stir magnetically, heat and boil for 10min until the solution is yellowish brown, then add 5mL 2wt.% sodium citrate solution to the boiling solution, and the solution Turn into dark blue, continue to boil for 10min, the color of the solution gradually becomes lighter, then stop heating, and obtain a wine-red nano-gold solution after cooling at room temperature. The prepared gold nanoparticles are spherical, with a diameter of 10-20nm ( figure 2 a).

[0044] (2) Use Al 2 o 3 The powder was mechanically polished to a smooth mirror surface, and then ultrasonically cleaned with double distilled water for 3 min each time, repeated three times. The cleaned electrodes were ultrasonically cleaned with absolute ethanol and twice...

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Abstract

The invention relates to a preparation method of a chitosan-graphene / gold nano particle@carbon nano-tube ionic imprinting sensor, and belongs to the technical field of nano functional materials and electrochemical sensors. The preparation method specifically comprises the following steps that chitosan is adopted as a functional monomer, lead ions serve as template ions, sodium tripolyphosphate serves as a cross-linking agent, gold nano particles, graphene and carbon nano-tubes serve as electric conduction enhancers, and the chitosan-based nano composite material imprinting lead ion electrochemical sensor is prepared through electrolytic deposition and dispensing methods. The electrochemical response and sensitivity of the sensor are improved through synergic and coupling effects of nano particles. The sensor has the advantages of being simple in preparation technology, rapid to respond, green and environmentally friendly, high in sensitivity and high in anti-disturbance capability, andcan achieve high-efficiency rapid detection of trace amount of lead ions in a water environment.

Description

technical field [0001] The invention relates to a preparation method of a chitosan-based nanocomposite material imprinted lead ion electrochemical sensor, belonging to the technical field of nano functional materials and electrochemical sensors. Background technique [0002] Lead, group VIA, the sixth period element, is one of the most serious pollutants in nature, and the harm of lead to human health, especially human children, has aroused widespread concern. Lead widely exists in the earth's crust, commonly found in soil, plants and water sources, rarely in the form of simple substances, mainly in the form of inorganic oxides in ores, and coexists with copper, silver, zinc, etc. Lead is mainly used in construction, lead-acid batteries, military, alloy and other industries. Lead pollution mainly comes from mining, smelting, waste incineration, industrial sewage and so on. Since the 1970s, the addition of lead additives in gasoline has made gasoline the most important sour...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26G01N27/30G01N27/48
CPCG01N27/26G01N27/308G01N27/48
Inventor 吴述平代祥子朱脉勇张侃申小娟李松军
Owner JIANGSU UNIV
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