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Biological synthesis method for spherical silver nanoparticle

A nano-silver particle, spherical nano-silver technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high energy consumption and high reaction temperature, and achieve low temperature and narrow distribution range. , the effect of good dispersion performance

Active Publication Date: 2015-09-09
科美尔(广州)生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method has a high reaction temperature and a high pH, ​​and the energy consumption is relatively high in a large amount of industrial production.

Method used

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  • Biological synthesis method for spherical silver nanoparticle
  • Biological synthesis method for spherical silver nanoparticle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A biosynthesis method of nano silver, the steps are as follows:

[0026] To prepare the mango peel extract:

[0027] Weigh the fresh mango skin, add water twice the weight of the mango skin, squeeze it into juice, filter, and store at 4°C for later use;

[0028] Preparation of desmodium extract:

[0029] Take the dry medicinal material Desmodium, add 8 times the weight of Desmodium, extract in a water bath at 85°C for 4 hours to obtain Desmodium extract, filter, and set aside;

[0030] Take 1 times the weight of mango peel extract, 0.15 times the weight of desmodium extract, mix with 10 times the weight of 0.5mM silver nitrate solution, adjust the pH of the silver nitrate solution to 8.0, and react at 50°C for 12 minutes.

Embodiment 2

[0032] A biosynthesis method of nano silver, the steps are as follows:

[0033] To prepare the mango peel extract:

[0034] Weigh the fresh mango skin, add water twice the weight of the mango skin, squeeze it into juice, filter, and store at 4°C for later use;

[0035] Preparation of desmodium extract:

[0036] Take the dry medicinal material Desmodium, add 8 times the weight of Desmodium, extract in a water bath at 90°C for 3 hours to obtain Desmodium extract, filter, and set aside;

[0037] Take 1 times the weight of mango peel extract, 0.2 times the weight of desmodium extract, mix with 9 times the weight of 0.5mM silver nitrate solution, adjust the pH of the silver nitrate solution to 8.0, and react at 55°C for 15 minutes.

Embodiment 3

[0039] A biosynthesis method of nano silver, the steps are as follows:

[0040] To prepare the mango peel extract:

[0041] Weigh the fresh mango skin, add water twice the weight of the mango skin, squeeze it into juice, filter, and store at 4°C for later use;

[0042] Preparation of desmodium extract:

[0043] Take the dry medicinal material Desmodium, add 8 times the weight of Desmodium, extract in a water bath at 87 °C for 4 hours to obtain the extract of Desmodium, filter, and set aside;

[0044] Take 1 times the weight of mango peel extract, 0.18 times the weight of desmodium extract, mix with 10 times the weight of 0.5mM silver nitrate solution, adjust the pH of the silver nitrate solution to 8.0, and react at 53°C for 14 minutes.

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Abstract

The invention discloses a biological synthesis method for a spherical silver nanoparticle. The biological synthesis method includes the steps: preparing mango peel extracting solution; preparing desmodium extracting solution; performing mixture reaction: mixing the mango peel extracting solution, the desmodium extracting solution and 0.5mM silver nitrate solution accounting for 9-10 times of the weight of the mango peel extracting solution and the desmodium extracting solution, adjusting a pH (potential of hydrogen) value of the silver nitrate solution to be 8.0, and reacting the solution for 12-15min at the temperature of 50-55 DEG C. According to the synthesis method, low temperature is needed, the pH is neutral, and the prepared silver nanoparticle is fine in dispersing performance, minimal in particle size, extremely narrow in distribution range, excellent in antibacterial effect and spherical or approximately spherical.

Description

technical field [0001] The invention relates to a nano-silver biosynthesis method, in particular to synthesizing nano-silver with mango peel extract and desmodium extract. Background technique [0002] Nano-silver particles have unique physical and chemical properties and are widely used in catalysis, optoelectronics, optics, biological science and pharmaceuticals. Therefore, it is of great significance to study the preparation method of nano-silver. At present, nano-silver particles can be prepared by physical (steam-condensation method, ball milling method, sputtering method, discharge explosion method), chemical (liquid phase reaction method, gas phase reaction method, template synthesis method), photocatalysis and biological methods. Compared with physical and chemical methods, biological methods have attracted the attention of many researchers because of their advantages such as high efficiency, rapidity, stability, simplicity, environmental friendliness, non-toxicity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
Inventor 史昕怡潘林武
Owner 科美尔(广州)生物科技有限公司
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