Method for green synthesis of nano-gold by using water extract of eucommia ulmoides

A water extract, green synthesis technology, applied in nanotechnology and other directions, can solve problems such as environmental and human harm

Active Publication Date: 2014-08-13
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for green synthesis of nano-gold using eucommia water extract, which solves the problem that various chemical reagents need to be added to the production of gold nano-materials in the existing chemical method, so the problem of harm to the environment and human body during the preparation process

Method used

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Embodiment 1

[0023] Embodiment 1: A kind of method of utilizing Eucommia ulmoides water extract green synthesis nano-gold of the present embodiment, its specific steps are as follows:

[0024] Step 1: Wash Eucommia ulmoides, dry at 60°C, and pulverize into powder;

[0025] Step 2: Weigh 20mg of Eucommia powder into a beaker, add 100mg of water, place in a water bath at a constant temperature of 80°C for 30 minutes, and filter;

[0026] Step 3: centrifuging the obtained solution at a high speed of 12000r / min to obtain the Eucommia water extract;

[0027] Step 4: mix the chloroauric acid solution with the Eucommia ulmoides water extract, the concentration of chloroauric acid in the mixed solution is 10 -3 mol / L, after mixing evenly, place in a constant temperature water bath, the temperature is controlled at 40°C, the reaction time is controlled at 20min, and the particle size of the prepared nano gold is 10-40nm.

[0028] Such as figure 1 Shown is the nano-gold prepared in Example 1 and ...

Embodiment 2

[0031] Embodiment 2: A kind of method of utilizing Eucommia ulmoides water extract green synthesis nano-gold of the present embodiment, its specific steps are as follows:

[0032] Step 1: Wash Eucommia ulmoides, dry at 60°C, and pulverize into powder;

[0033] Step 2: Weigh 20mg of Eucommia powder into a beaker, add 100mg of water, place in a water bath at a constant temperature of 80°C for 30 minutes, and filter;

[0034] Step 3: centrifuging the obtained solution at a high speed of 12000r / min to obtain the Eucommia water extract;

[0035] Step 4: mix the chloroauric acid solution with the Eucommia ulmoides water extract, the concentration of chloroauric acid in the mixed solution is 10 -4 mol / L, after mixing evenly, place in a constant temperature water bath, the temperature is controlled at 20°C, the reaction time is controlled at 30min, and the particle size of the prepared nano gold is 5-20nm.

Embodiment 3

[0036] Embodiment 3: A kind of method of utilizing Eucommia ulmoides water extract green synthesis nano-gold of the present embodiment, its specific steps are as follows:

[0037] Step 1: Wash Eucommia ulmoides, dry at 60°C, and pulverize into powder;

[0038] Step 2: Weigh 20mg of Eucommia powder into a beaker, add 100mg of water, place in a water bath at a constant temperature of 80°C for 30 minutes, and filter;

[0039] Step 3: centrifuging the obtained solution at a high speed of 12000r / min to obtain the Eucommia water extract;

[0040] Step 4: mix the chloroauric acid solution with the Eucommia ulmoides water extract, the concentration of chloroauric acid in the mixed solution is 10 -2 mol / L, after mixing evenly, place in a constant temperature water bath, the temperature is controlled at 60°C, the reaction time is controlled at 5min, and the particle size of the prepared nano gold is 30-60nm.

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Abstract

The invention discloses a method for green synthesis of nano-gold by using a water extract of eucommia ulmoides. The method comprises the following steps: cleaning the eucommia ulmoides, drying at 60 DEG C, and crushing the dried eucommia ulmoides into powder; weighing 20mg of eucommia ulmoides powder and putting into a flask, adding 100mg of water, putting into a water bath pot at the constant temperature of 80 DEG C, treating for 30 minutes, and filtering; carrying out centrifugal separation on the obtained solution at a high speed to obtain a water extract of eucommia ulmoides; uniformly mixing a gold chloride solution and the water extract of eucommia ulmoides, putting the mixture in the water bath pot at constant temperature to react, and thus obtaining nano-gold particles. The method disclosed by the invention has the beneficial effects that the method for preparing nano-gold by using a plant water extract as a reducing agent and protecting agent in a liquid phase under mild conditions is provided and has no damage to the environment and the human body.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation and relates to a method for green synthesis of nanometer gold by using Eucommia ulmoides water extract. Background technique [0002] The existing chemical method to produce gold nanomaterials needs to add a variety of chemical reagents, so the preparation process is harmful to the environment and human body, and the cost is too high. [0003] Due to their surface effect, quantum size effect, optical effect and other properties, gold nanoparticles and their composites have extensive potential in many aspects such as industrial catalysis, biomedicine, bioanalytical chemistry, food safety rapid detection, optical probes, sensors, etc. Application prospects. At present, the preparation methods of nano gold mainly include physical vapor phase evaporation condensation method, sputtering method, laser high temperature combustion method, mechanical grinding method, electrochemical...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 李伟杨锋刘慧宏
Owner WUHAN TEXTILE UNIV
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