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A gold nanoparticle for detecting heavy metal ions and preparation method thereof

A technology of gold nanoparticles and heavy metal ions, which is applied in the field of nanomaterials and ion detection, can solve the problems of complex sample preparation, time-consuming and laborious, etc., and achieve the effect of cheap and easy-to-obtain raw materials, simple and convenient operation, and strong selectivity

Active Publication Date: 2021-12-21
WUXI ZODOLABS BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Kanokwan Chaichana of Kasetsart University in Thailand developed a partial detection method for heavy metals. This detection method has the characteristics of high sensitivity, but its sample preparation is complicated and time-consuming, etc.

Method used

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  • A gold nanoparticle for detecting heavy metal ions and preparation method thereof
  • A gold nanoparticle for detecting heavy metal ions and preparation method thereof
  • A gold nanoparticle for detecting heavy metal ions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 10mL of 6mM chloroauric acid aqueous solution into the round bottom flask, stir and heat to boiling, quickly add 20mL of 1% sodium citrate aqueous solution, react for 15 minutes, add 30mL of 0.1mM 4'-amino-benzo- The DMF solution of 18-crown ether-6 and the ethanol solution of 3-mercaptopropionic acid of 30mL0.15mM obtain the reaction mixture solution, the pH value of the reaction mixture solution is regulated to 10 with HCl, and the solution color changes from light yellow to red, static Cool to room temperature to obtain gold nanoparticles. The prepared gold nanoparticles were tested by TEM, and their appearance was as follows: figure 1 shown.

Embodiment 2

[0042] Add 20mL of 3mM chloroauric acid aqueous solution into the round bottom flask, stir and heat to boiling, quickly add 20mL of 1% sodium citrate aqueous solution, react for 5 minutes, add 20mL of 0.1mM 4'-amino-benzo-18 -The DMF solution of crown ether-6 and the ethanol solution of 30mL0.15mM3-mercaptopropionic acid were obtained reaction mixture solution, and its pH value was regulated by HCl to be 13, and the color of the solution changed from light yellow to red, and was left to cool to room temperature to prepare get gold nanoparticles.

Embodiment 3

[0044] Add 20mL of 5mM chloroauric acid aqueous solution into the round bottom flask, stir and heat to boiling, quickly add 30mL of 1% sodium citrate aqueous solution, react for 10 minutes, add 40mL of 0.1mM 4'-amino-benzo- The DMF solution of 18-crown-6 and the ethanol solution of 40mL0.15mM 3-mercaptopropionic acid, the pH value of the reaction mixture solution was adjusted to 12 with HCl, the color of the solution changed from light yellow to red, and it was left to cool to room temperature to obtain Gold Nanoparticles.

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Abstract

The invention discloses a gold nanoparticle for detecting heavy metal ions and a preparation method thereof. The technical method is based on the agglomeration mechanism, and the amino group and or carboxyl group on the organic compound can form a strong hydrogen bond or pass through the benzene on the organic compound. The ring forms a strong π-π stacking effect, which causes the aggregation of gold nanoparticles, changes the color of the solution, and causes the peak position and absorption intensity of the surface plasmon resonance absorption peak of gold nanoparticles to change. Directly use the naked eye and UV-visible absorption peak The change of peak position and intensity can quickly detect whether there is Cd in the sample 2+ 、Ba 2+ , Pb 2+ ions and their concentration to realize the Cd in the sample 2+ 、Ba 2+ , Pb 2+ Rapid detection of ions. The technology has the advantages of simple operation, low cost and wide application range.

Description

technical field [0001] The invention belongs to the field of nanomaterials and ion detection, in particular to a method for detecting Cd 2+ 、Ba 2+ , Pb 2+ Gold nanoparticles of heavy metal ions and methods for their preparation. Background technique [0002] With the rapid development of industry and society, the ecological environment such as soil, air and water is seriously threatened by the pollution of heavy metal ions, which has attracted the attention of many environmentalists. Heavy metal pollution is different from organic or biological pollution. It is difficult to eliminate its pollution, and it can accumulate in the body through the enrichment of natural organisms. After entering the human body, it can interact with proteins and enzymes to deactivate organs and lead to chronic poisoning. Or cause diseases in the human body and disorders of the nervous system and endocrine system. Therefore, heavy metal pollution poses serious potential hazards to the health of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/77G01N21/33G01N21/29
CPCG01N21/78G01N21/77G01N21/33G01N21/293G01N2021/775G01N2021/258
Inventor 李星邱教艳吴爱国张玉杰
Owner WUXI ZODOLABS BIOTECH