Method for reducing and preparing functionalized nano-silver based on polyphenol

A nano-silver and functionalization technology, which is applied in the field of preparation of functionalized nano-silver by polyphenol reduction, can solve the problems of nano-silver morphology and size distribution, single composition, etc., and achieve good monodispersity, high biocompatibility, The effect of scavenging free radicals

Inactive Publication Date: 2013-09-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main technical problem to be solved by the present invention is to provide a reducing agent with a single component and biological functions, which can solve the problem of poor morphology and size distribution of nano-silver synthesized by using some biologically active substances in plants as reducing agents

Method used

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  • Method for reducing and preparing functionalized nano-silver based on polyphenol
  • Method for reducing and preparing functionalized nano-silver based on polyphenol
  • Method for reducing and preparing functionalized nano-silver based on polyphenol

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Embodiment 1

[0024] At room temperature, prepare 6mmol / L silver nitrate solution, 1mmol / L gallic acid solution and 0.02mol / L sodium hydroxide solution. Take 200uL 1mmol / L gallic acid solution and add it to 10mL ultrapure water, mix well, then add 0.02mol / L sodium hydroxide solution to adjust the pH value of the solution to 9.5, then add 200uL 6mmol / L silver nitrate solution to the above alkali In the neutral solution, mix evenly, and react in the dark at 10°C for 30 minutes to obtain a yellow nano-silver solution. The TEM characterization of the samples was as figure 1 As shown, the average particle size is 13nm.

Embodiment 2

[0026] At room temperature, prepare 1mmol / L silver acetate solution, 6mmol / L protocatechuic acid solution and 0.5mol / L sodium hydroxide solution. Take 200uL 6mmol / L protocatechuic acid solution and add it to 10mL ultrapure water, mix well, then add 0.5mol / L sodium hydroxide solution to adjust the pH value of the solution to 10.5, then add 300uL 1mmol / L silver acetate solution In the above alkaline solution, mix evenly, and react in the dark at 50°C for 10 minutes to obtain a yellow nano-silver solution. The TEM characterization of the samples was as figure 2 As shown, the average particle size is 8.8nm.

Embodiment 3

[0028] At room temperature, prepare 12mmol / L silver nitrate solution, 8mmol / L caffeic acid solution and 0.2mol / L potassium hydroxide solution. Take 200uL 8mmol / L caffeic acid solution and add it to 10mL ultrapure water, mix well, then add 0.2mol / L potassium hydroxide solution, adjust the pH value of the solution to 11.5, then add 200uL 12mmol / L silver nitrate solution to the above alkaline solution, mix evenly, and react in the dark at 20°C for 30 minutes to obtain a yellow nano-silver solution. The TEM characterization of the samples was as image 3 As shown, the average particle size is 6.8nm.

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Abstract

The invention discloses a novel method for reducing and preparing functionalized nano-silver based on polyphenol. The preparation process is as follows: 1), stock solutions of all reaction liquids are prepared, and the stock solutions comprise a silver-bearing predecessor stock solution, a polyphenol compound stock solution and an alkaline stock solution; 2), a polyphenol compound solution is prepared: a certain amount of the polyphenol compound stock solution is taken and added into ultrapure water, and the stock solution and the ultrapure water are mixed uniformly; 3), the pH value and the temperature of the polyphenol compound solution are adjusted: a proper amount of the alkaline stock solution is taken and added into the polyphenol compound solution prepared in the step 2), the pH value of the mixed solution is adjusted, the mixed solution is placed and kept out of the sun, and the temperature of the mixed solution is adjusted; and 4), a nano-silver solution is generated: a certain amount of the silver-bearing predecessor stock solution is added into the mixed solution with adjusted pH value and temperature in the step 3) and is kept out of the sun, and reaction is performed for a certain time. The operation method is simple, the synthesis speed is high, the cost is low, the biocompatibility is high, the method is pollution-free, the sizes of the synthesized nano-silver particles are small, the monodispersity is good, and the nano-silver also has the performance of a polyphenol compound.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing functionalized nano silver by reducing polyphenols. Background technique [0002] Nano silver has a good broad-spectrum antibacterial effect and is widely used in electronic products, household appliances, cosmetics, textiles and medical products, and is currently one of the most commercialized nanomaterials. In addition, nano-silver also has potential application value in photoacoustic imaging, anti-virus, anti-fungal, anti-biofilm, anti-thrombosis, anti-tumor, and promotion of wound healing. Therefore, the preparation of nano-silver has also received great attention from researchers. [0003] At present, the preparation methods of nano silver include physical method, chemical method and biological method. Physical methods include laser etching, electrochemical methods, spark discharge methods, etc., which generally require the use of sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 顾宁郭大伟周雪锋黄志海朱玲英
Owner SOUTHEAST UNIV
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