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Synthesis method of superfine monodisperse nano Ag

A synthetic method, a monodisperse technology, applied in nanotechnology, resistance to vector-borne diseases, etc., can solve the problems of uneven size and high temperature, and achieve the effects of good crystallization, low cost and good dispersion.

Pending Publication Date: 2022-06-03
北京市科学技术研究院分析测试研究所(北京市理化分析测试中心)
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires extremely high temperature. Through the TEM pictures in this patent, it is found that the distance between the quasi-spherical 5-7nm Ag nanocrystals is 2.4-3nm, and there are fine Ag nanocrystals distributed in the middle, and the size is not uniform.

Method used

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  • Synthesis method of superfine monodisperse nano Ag
  • Synthesis method of superfine monodisperse nano Ag
  • Synthesis method of superfine monodisperse nano Ag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Get 10ml oleylamine, 2ml sodium oleate and 9ml octadecene are heated to 160 DEG C, drop the silver nitrate of 0.68g into wherein, react 30 minutes, pour out mixed solvents such as oleylamine, sodium oleate and wash the gained with ethanol Precipitate and dry at 40°C for 30 minutes to obtain ultra-fine monodisperse nano-Ag. The obtained products were all characterized by XRD and transmission electron microscopy. Its powder X-ray diffraction spectrum is attached figure 1 shown. Its transmission electron microscope photo is attached figure 2 As shown, most of the synthesized samples are ultra-fine monodisperse nano-Ag powders.

Embodiment 2

[0039] Get 10ml oleylamine, 1ml oleic acid, 1ml sodium oleate and 10ml octadecene and heat to 200°C, put silver nitrate with a mass of 1.36g into it, react for 20 minutes, pour out oleylamine etc. and wash the resulting precipitate with ethanol, After drying at 40°C for 20 minutes, ultra-fine monodisperse nano-Ag can be obtained. The obtained products were all characterized by XRD and transmission electron microscopy. image 3 As shown, most of the synthesized samples are ultra-fine monodisperse nano-Ag powders.

Embodiment 3

[0041] Get 10ml of octadecylamine and 5ml of sodium oleate and 10ml of octadecene and heat to 180°C, drop into it the silver nitrate with mass of 2.72g, react for 50 minutes, pour out the mixed solvent of octadecylamine and sodium oleate and wash with ethanol The obtained precipitate was dried at 40° C. for 40 minutes to obtain ultra-fine monodisperse nano-Ag. The obtained products were all characterized by XRD and transmission electron microscopy. as attached Figure 4As shown, most of the synthesized samples are ultra-fine monodisperse nano-Ag powders.

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Abstract

The invention discloses a synthesis method of superfine monodisperse nano Ag, and belongs to the technical field of inorganic material preparation processes. According to the preparation method, metal inorganic salt is taken as a raw material and reacts in a long-chain amine solvent at 160-200 DEG C for 20-60 minutes, and the superfine monodisperse nano Ag which is good in crystallization and controllable in composition, structure, morphology and size and has the particle size smaller than 5 nm is formed by controlling experimental parameters such as the molar ratio of reactants, the concentration of the reactants and the reaction temperature. The method has the advantages of cheap and easily available raw materials, less reaction time consumption, simple operation, good process repeatability, stable product quality and safe and reliable operation, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a method for synthesizing ultra-fine monodisperse nano-Ag, belonging to the technical field of inorganic material preparation technology. Background technique [0002] Due to its large specific surface area and strong chemical reactivity, nano-Ag materials show potential application prospects in the fields of catalysis, antibacterial, and sensing. Because of its special physical and chemical properties such as high electrical conductivity and high thermal conductivity, it is widely used in the fields of microelectronics, optoelectronics, electronic appliances, superconducting materials, anti-electron radiation and flexible display screens. At present, although Ag nanocrystals with different sizes and morphologies have been synthesized by various methods, there are few reports of Ag nanocrystals with a particle size of less than 10 nm and good dispersion, and nano-Ag with a particle size of less than 5 nm has not been reported s...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00Y02A50/30
Inventor 刘向文江静静魏晓晓闫志勇张梅高峡
Owner 北京市科学技术研究院分析测试研究所(北京市理化分析测试中心)
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