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Method of biosynthesis of nano-silver by utilizing extract of Guangxi vittex cannabi folia leaves

A technology of biosynthesis and extraction, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of toxic chemical reagents, environmental pollution, non-conformity with green chemistry, etc., and achieve synthesis speed Fast, easy-to-use effects

Active Publication Date: 2017-06-20
HUAZHONG AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation methods of nano-silver are mainly physical methods and chemical synthesis methods. Physical methods generally involve high temperature, high pressure, and high energy consumption, while chemical methods generally involve toxic chemical reagents, which cause environmental pollution and do not conform to the principles of green chemistry.

Method used

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  • Method of biosynthesis of nano-silver by utilizing extract of Guangxi vittex cannabi folia leaves
  • Method of biosynthesis of nano-silver by utilizing extract of Guangxi vittex cannabi folia leaves
  • Method of biosynthesis of nano-silver by utilizing extract of Guangxi vittex cannabi folia leaves

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Effect test

Embodiment 1

[0021] Example 1: Synthesis of nano-silver particles through the leaf extract of Dujinga Guangxi

[0022] A method for biosynthesizing nano-silver using the leaf extract of Dujinga Guangxi, the steps of which are:

[0023] a. Preparation of extract:

[0024] Dry and grind the leaves of Dujinga Guangxi into powder (20 mesh), take 1g of Dujinga Guangxi leaf powder, add 100ml of distilled water, and extract at 200rpm for 10min to obtain a kind of extract, which is centrifuged at 10000rpm for 20min, and filtered The obtained supernatant is the leaf extract of Dujinga Guangxi, which is used as a matrix for nano-silver synthesis.

[0025] b. Nano silver synthesis:

[0026] Mix the leaf extract of Dujing Guangxi and the silver nitrate solution to prepare the reaction mixture. The concentration of the leaf extract of Dujing Guangxi is 1.2, 1.8, 2.4, 3.0mg / mL, and the concentration of silver nitrate is 1mM. The reaction was carried out for 60 minutes under the condition to obtain si...

Embodiment 2

[0029] Embodiment 2: Synthesis of nano-silver particles through the extract of Dujing leaves in Guangxi

[0030] A method for biosynthesizing nano-silver using the leaf extract of Dujinga Guangxi, the steps of which are:

[0031] a. Preparation of extract:

[0032] Dry and grind the leaves of Dujinga Guangxi into powder (40 mesh), take 1g of Dujinga Guangxi leaf powder, add 100ml of distilled water, and extract at 200rpm for 10min to obtain a kind of extract, which is centrifuged at 10000rpm for 20min, filtered The obtained supernatant is the leaf extract of Dujinga Guangxi, which is used as a matrix for nano-silver synthesis.

[0033] b. Nano silver synthesis:

[0034] Mixing the leaf extract of Dujinga Guangxi with AgNO 3 The solution prepared the reaction mixture, the extract concentration of Dujinga Guangxi leaves was 1.8mg / mL, the silver nitrate concentration was 1mM, 1.2mM, 1.4mM, 1.6mM, 1.8mM, and reacted for 60min under white light irradiation (100000lx) conditions,...

Embodiment 3

[0037] Embodiment 3: Synthesis of nano-silver particles through the leaf extract of Dujinga Guangxi

[0038] A method for biosynthesizing nano-silver using the leaf extract of Dujinga Guangxi, the steps of which are:

[0039] a. Preparation of extract:

[0040] Dry and grind the leaves of Dujinga Guangxi into powder (20 mesh), take 1g of Dujinga Guangxi leaf powder, add 100ml of distilled water, and extract at 200rpm for 10min to obtain a kind of extract, which is centrifuged at 10000rpm for 20min, and filtered The obtained supernatant is the leaf extract of Dujinga Guangxi, which is used as a matrix for nano-silver synthesis.

[0041] b. Nano silver synthesis:

[0042] Mixing the leaf extract of Dujinga Guangxi with AgNO 3 Solution preparation reaction mixture, the extract concentration of Dujinga Guangxi leaves was 1.8mg / mL, the concentration of silver nitrate was 1.6mM, reacted under the condition of white light irradiation (100000lx) for 60min, and obtained nano-silver ...

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Abstract

The invention discloses a method of biosynthesis of nano-silver by utilizing extract of Guangxi vittex cannabi folia leaves. The method comprises the following steps: first, drying and crushing Guangxi vittex cannabi folia leaves into powder, adding water for digestion, and carrying out centrifugal filtration on leach liquor to obtain the Guangxi vittex cannabi folia leaf extract; and then, mixing the Guangxi vittex cannabi folia leaf extract with silver nitrate solution, and reacting for 60-80 minutes under the condition of white light irradiation (100000 1x) to obtain nano-silver particles, wherein in the mixed solution, concentration of the Guangxi vittex cannabi folia leaf extract is 0.6-3.0 mg / mL, and concentration of the silver nitrate solution is 1.0-1.8 mM. According to the invention, the nano-silver synthesis speed is high, the method is feasible and convenient to operate, and the nano-silver solution can keep high stability.

Description

technical field [0001] The invention relates to the field of biotechnology, and more specifically relates to a method for biosynthesizing nano-silver using the leaf extract of Dujinga Guangxi, Background technique [0002] Nano-silver is metallic silver with a particle size between 1 and 100nm. It has a strong inhibitory and killing effect on dozens of pathogenic microorganisms such as Escherichia coli, Neisseria gonorrhoeae, and Chlamydia trachomatis, and will not produce drug resistance. It has important value in the application of antibacterial materials (see reference 1 for details: Naik R R, Stringer S J, Agarwal G, Jones S E, Stone M O. Nat. Mater., 2002, 1:169-172). [0003] At present, the preparation methods of nano-silver are mainly physical methods and chemical synthesis methods. Physical methods generally involve high temperature, high pressure, and high energy consumption, while chemical methods generally involve toxic chemical reagents, causing environmental po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F2009/245B22F1/054
Inventor 魏雪团范瑞梁邹俊张璟司果果
Owner HUAZHONG AGRI UNIV
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