CN103978223A - Method for green synthesis of nano-gold by using water extract of eucommia ulmoides - Google Patents
Method for green synthesis of nano-gold by using water extract of eucommia ulmoides Download PDFInfo
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- CN103978223A CN103978223A CN201410198358.XA CN201410198358A CN103978223A CN 103978223 A CN103978223 A CN 103978223A CN 201410198358 A CN201410198358 A CN 201410198358A CN 103978223 A CN103978223 A CN 103978223A
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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
The invention belongs to nano material preparing technical field, relate to a kind of method of utilizing the green synthesis of nano gold of bark of eucommia water extract.
Background technology
Existing chemical method is produced gold nano-material need to add number of chemical reagent, so in preparation process, environment and human body is produced to harm, and high cost.
Nm of gold and compound thereof have the performances such as skin effect, quantum size effect, optical effect because of it makes it in Industrial Catalysis, biological medicine, bioanalysis chemistry, food security fast detecting, optical probe, sensor, have extensively potential application prospect aspect numerous.The preparation method of nm of gold mainly contains physical vapor evaporation agglutination, sputtering method, laser high-temperature combustion method, mechanical milling method, electrochemical process, liquid phase chemical reduction method and photo-induction inducing defecation by enema and suppository etc. at present.Wherein, liquid phase chemical reduction method, because its equipment is simple, easy to operate, the feature such as pattern and size are controlled becomes the main method of low-cost preparation nm of gold.But most chemical methods need to be introduced more chemical reagent, exist production cost higher, and may bring certain problems such as environmental pollution.
The present invention utilizes hydro-thermal reaction system, only utilize the reproducible bark of eucommia water extract of occurring in nature under mild reaction conditions, to reduce gold ion, do not adopt other any reducing agents, prepared the controlled nm of gold of pattern and size, the method energy-saving and environment friendly, does not also have the relevant report about this respect at present.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing the green synthesis of nano gold of bark of eucommia water extract, solved existing chemical method production gold nano-material and need to add number of chemical reagent, so in preparation process, environment and human body have been produced to the problem of harm.
The technical solution adopted in the present invention is to carry out according to following steps:
Step 1: the bark of eucommia is cleaned, and 60 ℃ dry, pulverize powdered;
Step 2: take 20mg Eucommia Bark in beaker, add 100mg water, be placed in 80 ℃ of water-baths of constant temperature 30 minutes, filter;
Step 3: gained solution high speed centrifugation is separated, obtain bark of eucommia water extract;
Step 4: chlorauric acid solution is mixed with bark of eucommia water extract, be placed in thermostat water bath and react, obtain nano Au particle.
Further, the centrifugal 12000r/min of step 3 high speed; Gold chloride concentration in described step 4 in mixed liquor is 10
-2-10
-4mol/L.
Further, in step 4, the temperature of isothermal reaction is 20～60 ℃, and the reaction time is 5-30min.
Further, in step 1, the bark of eucommia refers to Bark of Eucommia Ulmoides and folium cortex eucommiae.
The invention has the beneficial effects as follows to provide and under a kind of temperate condition, in liquid phase, utilize vegetation water extract to prepare the method for gold nano for reducing agent and protective agent, can not produce harm to environment and human body.
Accompanying drawing explanation
Fig. 1 is nm of gold and the uv-visible absorption spectroscopy figure thereof that embodiment 1 makes;
Fig. 2 is the nano Au particle transmission electron microscope picture that embodiment 1 makes;
Fig. 3 is the particle diameter distribution map of the nano Au particle that makes of embodiment 1.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Comprise the following steps: the preparation of (1) bark of eucommia water extract: the bark of eucommia is cleaned, and 60 ℃ dry, pulverize powdered.Take 20mg Eucommia Bark in beaker, add 100mg water, be placed in 80 ℃ of water-baths of constant temperature 30 minutes, filter, available filter paper, by gained solution high speed centrifugation (12000r/min) separation, obtains bark of eucommia water extract; (2) chlorauric acid solution is mixed with bark of eucommia water extract, the gold chloride concentration in mixed liquor is 10
-2-10
-4mol/L, after mixing, be placed in thermostat water bath, temperature is controlled at 20 ℃-60 ℃, and the reaction time is controlled at 5-30min, controlled preparation, control different temperature and reaction time, change the concentration of gold chloride, can obtain the nano Au particle of different-grain diameter, the particle diameter of the nm of gold that can make is 5-60nm.
The technical problem that the present invention solves is to provide utilizes vegetation water extract to prepare the method for gold nano for reducing agent and protective agent in liquid phase under a kind of temperate condition; the method is simple; mild condition, has environmental friendliness, the feature such as the large and structure of output is distinct.
In bark of eucommia water extract, polyphenol is as reducing agent; do not need to add other chemical reagent, environment and biology are not had to toxic action, made up the deficiency that existing chemical method is produced gold nano-material; gutta-percha, as protective agent, can effectively be controlled the pattern of gold nano product.This reaction system is simple, and preparation is convenient, mild condition, as for the production of, can be greatly cost-saving.
The present invention will be described to enumerate specific embodiment below:
Embodiment 1: a kind of method of utilizing the green synthesis of nano gold of bark of eucommia water extract of the present embodiment, and its concrete steps are as follows:
Step 1: the bark of eucommia is cleaned, and 60 ℃ dry, pulverize powdered;
Step 2: take 20mg Eucommia Bark in beaker, add 100mg water, be placed in 80 ℃ of water-baths of constant temperature 30 minutes, filter;
Step 3: gained solution high speed centrifugation 12000r/min is separated, obtain bark of eucommia water extract;
Step 4: chlorauric acid solution is mixed with bark of eucommia water extract, and the gold chloride concentration in mixed liquor is 10
-3mol/L, after mixing, is placed in thermostat water bath, and temperature is controlled at 40 ℃, and the reaction time is controlled at 20min, and the particle diameter of the nm of gold of preparation is 10-40nm.
Being illustrated in figure 1 nm of gold and uv-visible absorption spectroscopy figure thereof that embodiment 1 makes. its maximum absorption band is 521nm.
Be illustrated in figure 2 the nano Au particle transmission electron microscope picture that embodiment 1 makes.In Fig. 2, scale is 20nm.
The particle diameter distribution map of the nano Au particle that makes of embodiment 1 as shown in Figure 3.
Embodiment 2: a kind of method of utilizing the green synthesis of nano gold of bark of eucommia water extract of the present embodiment, and its concrete steps are as follows:
Step 1: the bark of eucommia is cleaned, and 60 ℃ dry, pulverize powdered;
Step 2: take 20mg Eucommia Bark in beaker, add 100mg water, be placed in 80 ℃ of water-baths of constant temperature 30 minutes, filter;
Step 3: gained solution high speed centrifugation 12000r/min is separated, obtain bark of eucommia water extract;
Step 4: chlorauric acid solution is mixed with bark of eucommia water extract, and the gold chloride concentration in mixed liquor is 10
-4mol/L, after mixing, is placed in thermostat water bath, and temperature is controlled at 20 ℃, and the reaction time is controlled at 30min, and the particle diameter of the nm of gold of preparation is 5-20nm.
Embodiment 3: a kind of method of utilizing the green synthesis of nano gold of bark of eucommia water extract of the present embodiment, and its concrete steps are as follows:
Step 1: the bark of eucommia is cleaned, and 60 ℃ dry, pulverize powdered;
Step 2: take 20mg Eucommia Bark in beaker, add 100mg water, be placed in 80 ℃ of water-baths of constant temperature 30 minutes, filter;
Step 3: gained solution high speed centrifugation 12000r/min is separated, obtain bark of eucommia water extract;
Step 4: chlorauric acid solution is mixed with bark of eucommia water extract, and the gold chloride concentration in mixed liquor is 10
-2mol/L, after mixing, is placed in thermostat water bath, and temperature is controlled at 60 ℃, and the reaction time is controlled at 5min, and the particle diameter of the nm of gold of preparation is 30-60nm.
Claims (4)
1. a method of utilizing the green synthesis of nano gold of bark of eucommia water extract, is characterized in that carrying out according to following steps:
Step 1: the bark of eucommia is cleaned, and 60 ℃ dry, pulverize powdered;
Step 2: take 20mg Eucommia Bark in beaker, add 100mg water, be placed in 80 ℃ of water-baths of constant temperature 30 minutes, filter;
Step 3: gained solution high speed centrifugation is separated, obtain bark of eucommia water extract;
Step 4: chlorauric acid solution is mixed with bark of eucommia water extract, be placed in thermostat water bath and react, obtain nano Au particle.
2. according to a kind of method of utilizing the green synthesis of nano gold of bark of eucommia water extract described in claim 1, it is characterized in that: in described step 1, the bark of eucommia refers to Bark of Eucommia Ulmoides and folium cortex eucommiae.
3. according to a kind of method of utilizing the green synthesis of nano gold of bark of eucommia water extract described in claim 1, it is characterized in that: the centrifugal 12000r/min of described step 3 high speed; Gold chloride concentration in described step 4 in mixed liquor is 10
-2-10
-4mol/L.
4. a kind of method of utilizing the green synthesis of nano gold of bark of eucommia water extract according to claim 1, is characterized in that: in described step 4, the temperature of isothermal reaction is 20～60 ℃, and the reaction time is 5-30min.
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|---|---|---|---|
| CN201410198358.XA CN103978223B (en) | 2014-05-12 | 2014-05-12 | A kind of method utilizing Cortex Eucommiae water extract green syt nanometer gold |
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|---|---|---|---|
| CN201410198358.XA CN103978223B (en) | 2014-05-12 | 2014-05-12 | A kind of method utilizing Cortex Eucommiae water extract green syt nanometer gold |
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| CN103978223A true CN103978223A (en) | 2014-08-13 |
| CN103978223B CN103978223B (en) | 2016-07-06 |
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Cited By (5)
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| CN105965031A (en) * | 2016-07-21 | 2016-09-28 | 上海理工大学 | Method for preparing gold nanoparticles through fructus lycii extract liquid |
| CN107876798A (en) * | 2017-12-12 | 2018-04-06 | 上海理工大学 | A kind of method that gold nano grain is prepared using Sargent gloryvine extract solution |
| CN113020616A (en) * | 2021-03-22 | 2021-06-25 | 扬州大学 | Method for green synthesis of nanogold by using quercetin |
| CN114029501A (en) * | 2021-11-12 | 2022-02-11 | 中国科学院合肥物质科学研究院 | Green synthesis method of nano platinum and application of nano platinum in cosmetics |
| CN114406281A (en) * | 2022-01-28 | 2022-04-29 | 国科温州研究院(温州生物材料与工程研究所) | Method for preparing gold nanoparticles by reduction of plant polyphenol and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105965031A (en) * | 2016-07-21 | 2016-09-28 | 上海理工大学 | Method for preparing gold nanoparticles through fructus lycii extract liquid |
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| CN107876798A (en) * | 2017-12-12 | 2018-04-06 | 上海理工大学 | A kind of method that gold nano grain is prepared using Sargent gloryvine extract solution |
| CN113020616A (en) * | 2021-03-22 | 2021-06-25 | 扬州大学 | Method for green synthesis of nanogold by using quercetin |
| CN114029501A (en) * | 2021-11-12 | 2022-02-11 | 中国科学院合肥物质科学研究院 | Green synthesis method of nano platinum and application of nano platinum in cosmetics |
| CN114406281A (en) * | 2022-01-28 | 2022-04-29 | 国科温州研究院(温州生物材料与工程研究所) | Method for preparing gold nanoparticles by reduction of plant polyphenol and application |
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| CN103978223B (en) | 2016-07-06 |
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