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Composite gold nano material for pesticide residue detection and preparation method thereof

A technology for pesticide residue detection and nanomaterials, applied in the field of nanomaterials, can solve problems such as solution instability and short storage time, achieve good Raman enhancement performance, simple preparation method, and wide source of raw materials

Inactive Publication Date: 2019-03-29
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are several inherent defects in these methods, such as the instability of the solution and the short storage time.

Method used

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  • Composite gold nano material for pesticide residue detection and preparation method thereof
  • Composite gold nano material for pesticide residue detection and preparation method thereof
  • Composite gold nano material for pesticide residue detection and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A composite gold nanomaterial used for the detection of pesticide residues is prepared by using eggshell membrane as a carrier; and then reducing a chloroauric acid solution in situ to gold nanoparticles with a reducing agent.

[0036] A method for preparing a composite gold nanomaterial for pesticide residue detection, comprising the following steps:

[0037] (1) Eggshell membrane pretreatment: collect discarded eggshells; wash the collected eggshells repeatedly with water, then soak in water at room temperature for 1 hour; use tweezers to tear off the egg membranes from the soaked eggshells Let dry naturally and cut into squares with a side length of 1cm.

[0038] (2) Preparation of eggshell membrane carrier: take 5 pieces of eggshell membranes cut in step (1), immerse them in 10 mL of 10% by volume hydrochloric acid solution, add 0.1 g of hexadecyltrimethyl bromide ammonium chloride powder, and ultrasonically oscillate for 1 h to obtain the eggshell membrane carrier...

Embodiment 2

[0048] A composite gold nanomaterial used for the detection of pesticide residues is prepared by using eggshell membrane as a carrier; and then reducing a chloroauric acid solution in situ to gold nanoparticles with a reducing agent.

[0049] A method for preparing a composite gold nanomaterial for pesticide residue detection, comprising the following steps:

[0050] (1) Eggshell membrane pretreatment: collect discarded eggshells; wash the collected eggshells repeatedly with water, then soak them in water at room temperature for 2 hours; use tweezers to tear off the egg membranes from the soaked eggshells Let dry naturally and cut into squares with a side length of 1 cm.

[0051] (2) Preparation of eggshell membrane carrier: take 7 pieces of eggshell membranes cut in step (1), immerse them in 15mL of 10% by volume hydrochloric acid solution, add 0.15 g of hexadecyltrimethyl bromide ammonium powder, ultrasonically oscillated for 2 h to obtain the eggshell membrane carrier;

...

Embodiment 3

[0061] A composite gold nanomaterial used for the detection of pesticide residues is prepared by using eggshell membrane as a carrier; and then reducing a chloroauric acid solution in situ to gold nanoparticles with a reducing agent.

[0062] A method for preparing a composite gold nanomaterial for pesticide residue detection, comprising the following steps:

[0063] (1) Eggshell membrane pretreatment: collect discarded eggshells; wash the collected eggshells repeatedly with water, then soak them in water at room temperature for 3 hours; use tweezers to tear off the egg membranes from the soaked eggshells Let dry naturally and cut into squares with a side length of 1cm.

[0064] (2) Preparation of eggshell membrane carrier: take 10 pieces of eggshell membranes cut in step (1), immerse them in 30 mL of hydrochloric acid solution, add 0.3 g of surfactant powder, and ultrasonically shake at room temperature for 2 h. Eggshell membrane carrier;

[0065] (3) Adsorption of gold ion...

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Abstract

The invention discloses a composite gold nano material for pesticide residue detection and a preparation method thereof, and belongs to the technical field of nano materials. The composite gold nano material for pesticide residue detection is prepared by using discarded egg membranes as a template, and then reducing the chloroauric acid to gold nano particles by using a hydrazine hydrate solutionas a reducing agent. The preparation method of the composite gold nano material for pesticide residue detection comprises the following steps of: eggshell membrane pretreatment; preparation of an eggshell membrane carrier; gold ion adsorption; in situ reduction of gold nano particles; and preparation of the composite gold nano material carried by the eggshell membrane. The composite gold nano material has high sensitivity to pesticides and can be used for rapid detection of pesticide residue, and has broad application prospects. The preparation method is simple, the source of raw materials isrich, the cost is low and the price is low.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a composite gold nanomaterial used for pesticide residue detection and a preparation method thereof. Background technique [0002] The widespread use and inappropriate use of pesticides have caused serious pesticide residues in fruits and vegetables to exceed the standard, posing a serious threat to human health. Acute poisoning accidents of humans and animals. Although long-term consumption of agricultural by-products with excessive pesticide residues will not cause acute poisoning, it may cause chronic poisoning in humans and animals, leading to disease, and even affect the next generation; (2) At least 100 different pesticides are known to cause It will have a harmful effect on the nervous system of adults, and will damage the developing brains of children and adolescents, and have a certain impact on the normal development of children's intelligence; (3) Acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00G01N21/658
Inventor 杨大鹏丁棋刘明焕
Owner QUANZHOU NORMAL UNIV
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