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A kind of preparation method of nano-silver solution based on tea powder

A nano-silver, solution technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problems of high cost, complex composition of nano-silver dispersion, complicated process, etc., and achieve a mild preparation process. , good antibacterial properties and biomimetic catalytic performance, the effect of simple preparation process

Active Publication Date: 2019-05-21
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process of synthesizing nano-silver is complicated, and materials such as dispersants, stabilizers, and protective agents need to be added to prevent the agglomeration of nano-silver particles. For example, a Chinese patent with publication number CN 103212720A discloses a nano-silver dispersion and its preparation method, and a preparation method of nano-silver bacteriostatic coating, it is necessary to add materials such as thickener and dispersant, and the finally obtained nano-silver dispersion has complex components and high cost

Method used

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  • A kind of preparation method of nano-silver solution based on tea powder
  • A kind of preparation method of nano-silver solution based on tea powder
  • A kind of preparation method of nano-silver solution based on tea powder

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Effect test

Embodiment 1

[0031] A kind of preparation method based on the nano-silver solution of tea powder, comprises the following steps:

[0032] Step 1: Take 0.3 g of white tea powder and dissolve it in 1000 mL of water at room temperature to obtain a tea powder solution with a concentration of 0.3 mg / mL;

[0033] Step 2: Take 8.4935g of silver nitrate and dissolve it in 50mL of water at room temperature to obtain a silver salt solution. The concentration of the silver salt solution is 1moL / L;

[0034] Step 3: Add 80 μL of the silver salt solution described in step 2 to 30 mL of the tea powder solution described in step 1 to obtain a mixed solution, the concentration of silver nitrate in the mixed solution is 0.4 mmol / L, mix and stir at room temperature to obtain nano silver Mixed solution; the stirring speed is 80 rpm, and the stirring time is 80 minutes;

[0035] Step 4: Centrifuge and filter the nano-silver mixed liquid described in step 3, then use ethanol to wash and filter multiple times, ...

Embodiment 2

[0038] A kind of preparation method based on the nano-silver solution of tea powder, comprises the following steps:

[0039] Step 1: Take 0.15 g of black tea powder and dissolve it in 100 mL of water at room temperature to obtain a tea powder solution with a concentration of 1.5 mg / mL;

[0040] Step 2: Take 8.4935g of silver nitrate and dissolve it in 50mL of water at room temperature to obtain a silver salt solution. The concentration of the silver salt solution is 1moL / L;

[0041] Step 3: Add 100 μL of the silver salt solution described in step 2 to 20 mL of the tea powder solution described in step 1 to obtain a mixed solution, the concentration of silver nitrate in the mixed solution is 0.5 mmol / L, mix and stir at room temperature to obtain nano silver Mixed solution; the stirring speed is 80 rpm, and the stirring time is 10 minutes;

[0042] Step 4: Centrifuge and filter the nano-silver mixed liquid described in step 3, then use ethanol to wash and filter multiple times,...

Embodiment 3

[0046] A kind of preparation method based on the nano-silver solution of tea powder, comprises the following steps:

[0047] Step 1: Take 0.1 g of green tea powder and dissolve it in 1000 mL of water at room temperature to obtain a tea powder solution. The concentration of the tea powder solution is 0.1 mg / mL;

[0048] Step 2: Take 8.4935g of silver nitrate and dissolve it in 50mL of water at room temperature to obtain a silver salt solution. The concentration of the silver salt solution is 1moL / L;

[0049] Step 3: Add 50 μL of the silver salt solution described in step 2 to 20 mL of the tea powder solution described in step 1 to obtain a mixed solution, the concentration of silver nitrate in the mixed solution is 0.25 mmol / L, mix and stir at room temperature to obtain nano silver Mixed solution; the stirring speed is 60 rpm, and the stirring time is 60 minutes;

[0050] Step 4: Centrifuge and filter the nano-silver mixed solution described in step 3, then use ethanol to wash...

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Abstract

The invention provides a preparation method of nano-silver solution based on tea powder, comprising the following steps: step 1: take tea powder, dissolve it in water at room temperature to obtain a tea powder solution; step 2: take silver salt, and dissolve it in water at room temperature Dissolve in water to obtain a silver salt solution; step 3: add the silver salt solution described in step 2 to the tea powder solution described in step 1 to obtain a mixed solution, mix and stir at room temperature to obtain a nano-silver mixed solution; step 4 : the nano-silver mixed solution described in step 3 is centrifuged, filtered, washed with ethanol and filtered, and dispersed in water to obtain a nano-silver solution. The present invention uses tea powder as a reducing agent, and at the same time, the tea powder is also used as a stabilizer. The preparation process does not need to add other substances such as stabilizers. The preparation process is simple, mild, green, safe and non-toxic, and ensures the safety of operators.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a method for preparing a nano-silver solution based on tea powder. Background technique [0002] Nano-silver is a new type of functional material, which has various properties such as nano-size effect and noble metal surface effect, and is widely used in the fields of sensors, biological antibacterial, and biomimetic catalysts. Nano-silver has good antibacterial properties and also has biomimetic enzyme properties. At present, the process of synthesizing nano-silver is complicated, and materials such as dispersants, stabilizers, and protective agents need to be added to prevent the agglomeration of nano-silver particles. For example, a Chinese patent with publication number CN 103212720A discloses a nano-silver dispersion and its preparation method, and a method for preparing a nano-silver antibacterial coating, it is necessary to add thickeners, dispersants and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/0545B22F1/054
Inventor 许威聂磊李莹莹刘欢张珊李娟
Owner XINYANG NORMAL UNIVERSITY
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