Method for simply and rapidly producing (Au) nucleus and (Ag) shell nanoparticle

A nanoparticle and fast technology, applied in the field of nanoparticle preparation, can solve the problems of complicated method steps, increased difficulty of promotion, strict requirements on reaction conditions, etc., and achieves the effects of low cost, simple and fast preparation method, and easy-to-obtain reagents

Inactive Publication Date: 2008-06-11
GUANGXI NORMAL UNIV
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  • Application Information

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Problems solved by technology

Among these methods, some have complicated method steps, and some have strict reaction conditions, which increases the difficulty of popularization.

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  • Method for simply and rapidly producing (Au) nucleus and (Ag) shell nanoparticle
  • Method for simply and rapidly producing (Au) nucleus and (Ag) shell nanoparticle

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and embodiment the present invention will be further elaborated:

[0015] A simple and rapid preparation of (Au) 核 (Ag) 壳 The nanoparticle method comprises the steps of:

[0016] (1) Prepare gold nano solution by Frens method: accurately pipette 1ml 1% chloroauric acid solution in a 250ml Erlenmeyer flask, add twice distilled water to a volume of about 100ml, heat to boiling, add 6ml 1% citric acid tris Sodium solution, after boiling for 15min, cooled with tap water, transferred to constant volume in a 100ml volumetric flask, to obtain gold nanoparticles with a particle diameter of 9nm;

[0017] (2) Add 2×10 to the 10ml colorimetric tube -3 mol / LAgNO 3 Solution 0.1-2.0ml, 1% trisodium citrate solution 0.1-2.0ml and the above-mentioned gold nano sol 1-6ml, add distilled water once to make up to 10ml, react in 60-100°C water bath for 5min, take out and cool, and then the brown Red (Au) 核 (Ag) 壳 nanoparticles.

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Abstract

The invention discloses a process for rapidly and conveniently preparing (Au) nuclear (Ag) shell nanometer particles, which comprises adding gold nanometer sol into quantitative mixed solution of sodium citrate and silver nitrate, adding additionally distilled water and shakening up, reacting in constant temperature water bath for a certain time, taking out, and cooling, and thereby brown red (Au) nuclear (Ag) shell composite nanometer particles are prepared. The invention has the advantages that the process for preparation is simple and rapid, reaction conditions are temperate, agents are easy to be obtained, cost is low, and composite nanometer particles which are prepared has both good monodispersity of gold nanometers and high SERS effects of silver nanometer sol.

Description

Technical field: [0001] The present invention relates to the preparation method of nanoparticle, specifically a kind of simple and rapid preparation (Au) 核 (Ag) 壳 nanoparticle approach. Background technique: [0002] Composite nanomaterials with core-shell structures are an increasingly important research area at the frontiers of materials science in recent years. This kind of material has many unique properties, such as: monodispersity, core-shell operability, stability, controllability, self-assembly and ability to involve light, electricity, magnetism, catalysis, chemical and biological reactions, and has a broad range of applications. Application prospects. At present, there are many methods for preparing Au-Ag composite nanoparticles, mainly using colloidal particles as templates to prepare core-shell nanoparticles by chemical reduction. Among these methods, some have complicated method steps, and some have strict requirements on reaction conditions, which increases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 蒋治良李纪顺
Owner GUANGXI NORMAL UNIV
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