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Gold nanoparticle and preparing method thereof

A technology of gold nanoparticles and chloroauric acid, applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of cumbersome operation, complex structure of modifier, high price, etc., and achieve simple and convenient operation, low cost and high sensitivity high effect

Active Publication Date: 2018-12-07
宁波市大学科技园发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This modifier has complex structure, cumbersome operation and expensive price (Chem. Commun., 2017, 53, 5602-5605)

Method used

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  • Gold nanoparticle and preparing method thereof
  • Gold nanoparticle and preparing method thereof
  • Gold nanoparticle and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Add 50mL 0.3mM chloroauric acid aqueous solution into the round bottom flask, stir and heat to boiling, then quickly add 10mL 0.5mM 4'-amino-dibenzo-18-crown-6 ethanol solution and 10mL 0.8mM citric acid Sodium aqueous solution, the pH value of the reaction mixture solution was adjusted to 6.5 with HCl, after 15 minutes of reaction, the color of the solution changed from light yellow to red, and the solution was cooled to room temperature to obtain gold nanoparticles. The prepared gold nanoparticles were tested by TEM ( figure 1 ). 4-Aminobenzo-18-crown-6 is used as a ligand, stabilizer and modifier, and its structure is simple and its price is relatively low.

Embodiment 2

[0024] Add 20mL of 1.5mM chloroauric acid aqueous solution to the round bottom flask, stir and heat to boiling, then quickly add 20mL of 0.5mM 4'-amino-dibenzo-18-crown-6 ethanol solution and 20mL of 0.8mM citric acid Sodium aqueous solution, the pH value of the reaction mixture solution was adjusted to 2.5 with HCl, after 8 minutes of reaction, the color of the solution changed from light yellow to red, and the solution was cooled to room temperature to obtain gold nanoparticles.

Embodiment 3

[0026] Add 30mL of 1.0mM chloroauric acid aqueous solution into the round bottom flask, stir and heat to boiling, then quickly add 15mL of 0.5mM 4'-amino-dibenzo-18-crown-6 ethanol solution and 15mL of 0.8mM citric acid Sodium aqueous solution, the pH value of the reaction mixture solution was adjusted to 4 with HCl, after 10 minutes of reaction, the color of the solution changed from light yellow to red, and the solution was cooled to room temperature to obtain gold nanoparticles.

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Abstract

The invention discloses a gold nanoparticle and a preparing method thereof. The gold nanoparticle is used for rapidly detecting potassium ions in lake water, tap water, alkaline mineral water, human body blood or urine samples. The method is based on the agglomerate mechanism, amidogen on an organic compound ligand is used for forming strong hydrogen-bond interaction, or through a benzene ring onthe organic compound ligand, a strong pi-pi stacking effect is formed, gold nanoparticle reunion is formed, the solution color is changed, the peak position capable of enabling gold nanoparticle surface plasmas to resonate so as to absorb peaks and absorbing strength are changed, naked eyes and ultraviolet visible spectrophotometry can be directly used for judging, whether K+ ions exist in the samples can be rapidly detected, and rapid detection of K+ ions in the samples can be achieved. The method has the beneficial effects of being easy to operate, low in cost, high in sensitivity, wide in application range and the like.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a gold nanoparticle and a preparation method thereof. Background technique [0002] Potassium ion is a positive 1-valent ion obtained by losing an electron in the outermost shell of a potassium atom, written as K + . Potassium ions have 8 electrons outside the nucleus to achieve a stable structure. Potassium ions are the main cations in intracellular fluid, and 98% of potassium in the body exists in cells. Under normal circumstances, the potassium content in the daily diet is sufficient to meet the needs of the body, and there will be no potassium deficiency. After potassium is absorbed by the intestines, about 30% is excreted by the kidneys. The kidneys have no restriction on the excretion of potassium. Even if the body is in a state of potassium deficiency, the kidneys continue to excrete potassium. Potassium ions are beneficial to human health, but when the c...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00G01N21/78G01N21/33B82Y30/00B82Y40/00
CPCG01N21/33G01N21/78B82Y30/00B82Y40/00B22F9/24B22F1/054
Inventor 李星
Owner 宁波市大学科技园发展有限公司
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