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Preparation method of gold-silver alloy nanoparticles

A nanoparticle and gold-silver alloy technology, applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of poor dispersion of gold-silver alloy nanoparticles, cumbersome preparation process, high preparation cost, etc. The effect of low cost and simple operation

Inactive Publication Date: 2017-05-10
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing gold-silver alloy using water-soluble starch in order to solve technical problems such as environmental pollution, high preparation cost, complicated preparation process and poor dispersion of prepared gold-silver alloy nanoparticles in the preparation process of the above-mentioned nanoparticles. Nano Green Synthesis Method

Method used

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  • Preparation method of gold-silver alloy nanoparticles
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  • Preparation method of gold-silver alloy nanoparticles

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Embodiment 1

[0038] A preparation method of gold-silver alloy nanoparticles, specifically comprising the steps of:

[0039] (1) In beaker 1, dissolve 5 g of water-soluble starch in 25 mL of deionized water to prepare a 0.58 mol / L aqueous solution of water-soluble starch;

[0040] Described water-soluble starch is amylose, and its molecular formula is C 12 h 22 o 11 , the molecular weight is 342.30;

[0041] (2) In beaker 2, dissolve 1 g of chloroauric acid crystals in 25 mL of deionized water to form a 0.1 mol / L chloroauric acid aqueous solution;

[0042] In the beaker 3, 0.085g silver nitrate crystals were dissolved in 50ml deionized water to form a 0.01mol / L silver nitrate aqueous solution;

[0043] First add 30 mL of deionized water to beaker 4, then add 20 μL of chloroauric acid aqueous solution and 5 mL of silver nitrate aqueous solution to the deionized water in beaker 4 in sequence, and control the ultrasonic frequency at 25KHz for 1 min. After mixing, obtain chlorine Gold acid...

Embodiment 2

[0052] A preparation method of gold-silver alloy nanoparticles, specifically comprising the steps of:

[0053] (1) In beaker 6, dissolve 5 g of water-soluble starch in 25 ml of deionized water to obtain a 0.58 mol / L aqueous solution of water-soluble starch;

[0054] Described water-soluble starch is amylose, and its molecular formula is C 12 h 22 o 11 , the molecular weight is 342.30;

[0055] (2) In beaker 7, dissolve 1 g of chloroauric acid crystals in 25 mL of deionized water to form a 0.1 mol / L aqueous solution of chloroauric acid;

[0056] In the beaker 8, 0.085g silver nitrate crystals were dissolved in 50ml deionized water to form a 0.01mol / L silver nitrate aqueous solution;

[0057] First add 30 mL of deionized water to the beaker 9, then add 16.66 μL of chloroauric acid aqueous solution and 5 mL of silver nitrate aqueous solution into the deionized water successively, control the vibration frequency to 25KHz ultrasonic conditions and ultrasonically oscillate for 1...

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Abstract

The invention discloses a preparation method of gold-silver alloy nanoparticles. The preparation method comprises the following steps: firstly preparing a water soluble starch aqueous solution, a chloroauric acid aqueous solution and a silver nitrate aqueous solution in steps, then adding the chloroauric acid aqueous solution and the silver nitrate aqueous solution into deionized water, and carrying out ultrasonic vibration and mixing to obtain mixed solution of chloroauric acid and silver nitrate; heating the water soluble starch aqueous solution until the boiling state is achieved, then adding the mixed solution of chloroauric acid and silver nitrate, controlling the pH value of a reaction system to be 3.6-4.9 by controlling the addition amount of the mixed solution of chloroauric acid and silver nitrate, then reacting for 10-60 minutes while keeping the boiling state, carrying out centrifugal separation on the obtained reaction liquid, and drying the obtained sediments, thus obtaining the gold-silver alloy nanoparticles. The preparation method disclosed by the invention has the advantages of low cost, simplicity in operation, environment-friendly preparation process and the like. The obtained gold-silver alloy nanoparticles also provide an experimental foundation for subsequent biomarker application research and can be applied to the field of biomedicines.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing gold-silver alloy nanoparticles by using water-soluble starch. Background technique [0002] Gold-silver alloy nanoparticles have become the focus of research in the field of nanomaterials in recent years because of their unique and excellent properties in the fields of optics, chemistry, and electricity because their structures are different from those of gold and silver single-metal nanoparticles. Gold-silver alloy nanoparticles have unique electrical properties and structures, and non-toxic gold-silver alloy nanoparticles can be used for biological imaging. At the same time, the high-purity and pollution-free gold-silver nanoparticles also have high catalytic activity for carbon monoxide (CO), which also has a profound impact on the removal of CO toxicity. It can be seen that how to prepare non-toxic and non-polluting gold-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/054
Inventor 孙丽吕鹏程尹跃超李浩男王法
Owner UNIV OF SHANGHAI FOR SCI & TECH
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