Preparation method of spherical gold nanoparticle

A gold nanoparticle and spherical technology, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problems of chemical reagent toxicity, ecological environmental hazards, carcinogenicity, etc., and achieve the effect of simple equipment, low price and convenient operation

Inactive Publication Date: 2017-12-22
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of the chemical method is that it can quickly synthesize spherical gold nanoparticles. However, in the reaction process, it is generally necessary to introduce chemical reagents as reducing agents and surfactants. Som

Method used

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  • Preparation method of spherical gold nanoparticle
  • Preparation method of spherical gold nanoparticle
  • Preparation method of spherical gold nanoparticle

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Experimental program
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Embodiment 1

[0024] Step 1, dissolving fructose in deionized water to obtain 0.5-1.5 mol / L fructose aqueous solution. In this embodiment, the concentration of the substance amount in the fructose aqueous solution is 1.11 mol / L.

[0025] Step 2, dissolving chloroauric acid crystals in deionized water to form a 0.05-0.12 mol / L chloroauric acid-forming solution. In this embodiment, the concentration of the substance amount in the chloroauric acid aqueous solution is 0.1 mol / L.

[0026] Step 3, washing the glass container used, and rinsing it with deionized water.

[0027] Step 4: inject 25 mL of fructose aqueous solution into the flask, heat to boiling, and keep boiling for 5-15 minutes. In this embodiment, the time to keep the fructose aqueous solution boiling is 15 minutes.

[0028] Step 5: In boiling state, add 80 μL of chloroauric acid solution, react for 5-10 minutes, and keep the pH value of the reaction system between 4.0 and 5.5. In this embodiment, the pH value of the reaction sy...

Embodiment 2

[0043]Step 1, dissolving fructose in deionized water to obtain 0.5-1.5 mol / L fructose aqueous solution. In this embodiment, the concentration of the substance amount in the fructose aqueous solution is 1.11 mol / L.

[0044] Step 2, dissolving chloroauric acid crystals in deionized water to form a 0.05-0.12 mol / L chloroauric acid-forming solution. In this embodiment, the concentration of the substance amount in the chloroauric acid aqueous solution is 0.1 mol / L.

[0045] Step 3, washing the glass container used, and rinsing it with deionized water.

[0046] Step 4: inject 25 mL of fructose aqueous solution into the flask, heat to boiling, and keep boiling for 5-15 minutes. In this embodiment, the time to keep the fructose aqueous solution boiling is 15 minutes.

[0047] Step 5, in boiling state, add 160 μL of chloroauric acid solution, react for 5-10 minutes, and keep the pH value of the reaction system between 4.0 and 5.5. In this embodiment, the pH value of the reaction sy...

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Abstract

The invention provides a preparation method of a spherical gold nanoparticle. The method is characterized by comprising the following steps: 1, dissolving fructose in deionized water to obtain a fructose water solution; 2, dissolving chloroauric acid crystal in the deionized water to form a chloroauric acid solution; 3, heating the fructose water solution to boiling, then adding the chloroauric acid solution, keeping reaction in the boiling state for 5-10min, and keeping the PH value of the reaction system between 4.0-5.5; 4, obtaining a reaction solution after the reaction is completed; 5, carrying out centrifugal separation on the reaction solution so as to obtain a precipitate; and 6, drying the precipitate so as to obtain the spherical gold nanoparticle. According to the preparation method of the spherical gold nanoparticle, the fructose is used as a reducing agent and a dispersing agent, is convenient and easy to obtain and is free of toxicity, the price of the fructose is low, and the fructose is used as the reducing agent to replace a conventional chemical reagent, no toxic chemical reagent residue is generated on the surface of the obtained spherical gold nanoparticle, and the spherical gold nanoparticle shows an obvious optical signal.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing spherical gold nanoparticles. Background technique [0002] Gold nanoparticles are widely used in industrial catalysis, chemical sensing, medical imaging, drug delivery, and biomarking due to their unique optical and electrochemical properties. In the field of biomedicine, nano-gold labels can be obtained after the surface of gold nanoparticles is modified. The label has a spectrum similar to that of gold nanoparticles, and this feature can be used to detect the labeled substance. Spherical gold nanoparticles have a better specific surface area and are more advantageous in the field of catalysis. At present, the rapid synthesis of non-toxic spherical gold nanoparticles with obvious plasmon resonance signals has become a research hotspot in the fields of biomedicine and catalysis. [0003] The traditional synthetic methods of s...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00B22F1/00
CPCB82Y40/00B22F9/24B22F1/065
Inventor 孙丽王法尹跃超吕鹏程李浩男
Owner UNIV OF SHANGHAI FOR SCI & TECH
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