CN1513631A - Preparation method of nano-gold particle - Google Patents
Preparation method of nano-gold particle Download PDFInfo
- Publication number
- CN1513631A CN1513631A CNA031283284A CN03128328A CN1513631A CN 1513631 A CN1513631 A CN 1513631A CN A031283284 A CNA031283284 A CN A031283284A CN 03128328 A CN03128328 A CN 03128328A CN 1513631 A CN1513631 A CN 1513631A
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- aqueous solution
- preparation
- nitromethane
- gold
- chlorauride
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
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Abstract
A process for preparing the gold nanoparticles features that the chlorauric acid or gold chloride is added to the alkaline aqueous solution of nitromethane to obtain the aqueous sol of gold nanoparticles. Its advantages are adjustable granularity, high speed and low cost.
Description
Technical field
The present invention relates to a kind of preparation method of golden nanometer particle.
Background technology
Golden nanometer particle has important use in a plurality of fields such as catalysis, electronics and optics, biotechnologys.With the catalytic field is example, and gold did not have very high activity originally as catalyst, and the size that can work as gold particle is during less than 10nm, and its catalytic activity but has surprising raising, and a lot of oxidations and reduction reaction are shown high catalytic performance.For example, α-Fe
2O
3Or TiO
2The nano catalyst that supports is oxidized to CO to CO
2This important reaction has high catalytic activity, just can make the CO complete oxidation under-70 ℃ of conditions.
Preparation method about golden nanometer particle; though existing many reports; but these methods generally need use a large amount of polymer or special chemical reagent (as long-chain mercaptan or long-chain amine) to make protective agent; the reducing agent (as sodium borohydride) that the employing that has is more expensive, and preparation process mostly needs more step.
Summary of the invention
The present invention is directed to the problems referred to above, propose a kind of preparation method of golden nanometer particle, this method is not only simple, and uses cheap chemical reagent (except the essential chlorauride), thereby preparation cost is lower.
Technical scheme provided by the invention is: a kind of preparation method of golden nanometer particle, the aqueous solution that in the alkaline aqueous solution of nitromethane, adds chlorauride or gold chloride, perhaps, can obtain the gold particle of nano-scale with the mixed aqueous solution furnishing alkalescence of nitromethane and chlorauride or gold chloride.
Above-mentioned alkalescence is that the pH value is greater than 7.The method of above-mentioned furnishing alkalescence is the aqueous solution that adds NaOH or potassium hydroxide or sodium carbonate or potash in solution.The aqueous solution of the aqueous solution of the used nitromethane of the present invention and chlorauride or gold chloride can be in that arbitrarily concentration and ratio hybrid reaction obtain the gold particle of nano-scale.But the concentration of the aqueous solution of used nitromethane is preferably 10
-6Mol/l to 10mol/l; The concentration of the aqueous solution of chlorauride or gold chloride is preferably 10
-6Mol/l to 1mol/l.
The size of the prepared gold particle of the present invention is relevant with the pH value of the ratio of golden salt/nitromethane and solution, and the ratio of golden salt/nitromethane or pH value are high more, and the size of gold particle is big more.
Advantage of the present invention is: preparation process is very simple, and reaction is quick, and the reaction condition gentleness is only used a small amount of cheap chemical reagent (except that essential golden salt), and its preparation cost is lower.And gained gold particle size can be by regulating golden salt/nitromethane ratio or the pH value of solution regulate and control.
Description of drawings
Fig. 1 is preparation flow figure of the present invention;
Fig. 2, Fig. 3 throw electromicroscopic photograph for the high-resolution of the different size gold particle that the present invention makes.
The specific embodiment
Referring to Fig. 1, with HAuCl
4Add alkaline CH
3NO
2The aqueous solution is example, with 0.6 μ l CH
3NO
2Be dissolved in 5ml distilled water and make the nitromethane aqueous solution, stir the 1mol/l NaOH or the KOH aqueous solution that add 20 μ l, the pH value of solution is 11.06, stirs the HAuCl that adds 25 μ L24mmol/l after 2 minutes
4The aqueous solution promptly has obvious color to change in the several seconds, the hydrosol of the golden nanometer particle of the light brown that obtained in 30 minutes is stirred in continuation.
Adopt said method, the pH value that changes solution can obtain the hydrosol of different colours.When the volume that for example adds the 1mol/l NaOH aqueous solution is respectively 20 μ l, 40 μ l, 60 μ l and 80 μ l, the pH value of solution is respectively 11.06,11.82,12.26,12.43, and that the color of the hydrosol of the golden nanometer particle that makes thus is followed successively by is orange, red, purple and blueness.
The color of the colloidal sol of metal nanoparticle and the size and dimension of metallic are closely related.The pH value is micro-(HRTEM) image of high-resolution projection electron such as Fig. 2, shown in Figure 3 of the gold particle for preparing under above-mentioned 11.06 and 11.82 conditions, and Fig. 2, Fig. 3 correspond respectively to the golden nanometer particle hydrosol that obtains behind the adding gold chloride in pH=11.06,11.82 the nitromethane aqueous solution; Its size is respectively 1～2nm and 6～7nm.
Above-mentioned HAuCl
4The aqueous solution replaces obtaining similar result with the chlorauride aqueous solution.
Claims (5)
1. the preparation method of a golden nanometer particle, it is characterized in that: the aqueous solution that in the alkaline aqueous solution of nitromethane, adds chlorauride or gold chloride, perhaps, can obtain the gold particle of nano-scale with the mixed water solution furnishing alkalescence of nitromethane and chlorauride or gold chloride.
2. preparation method according to claim 1 is characterized in that: above-mentioned alkalescence is that the pH value is greater than 7.
3. preparation method according to claim 1 and 2 is characterized in that: the method for above-mentioned furnishing alkalescence is for adding the aqueous solution of NaOH or potassium hydroxide or sodium carbonate or potash in solution.
4. preparation method according to claim 1 and 2 is characterized in that: the concentration range of the aqueous solution of above-mentioned nitromethane is 10
-6Mol/l to 10mol/l.
5. preparation method according to claim 1 and 2 is characterized in that: the concentration range of the aqueous solution of above-mentioned chlorauride or gold chloride is 10
-6Mol/l to 1mol/l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03128328 CN1260025C (en) | 2003-07-15 | 2003-07-15 | Preparation method of nano-gold particle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03128328 CN1260025C (en) | 2003-07-15 | 2003-07-15 | Preparation method of nano-gold particle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1513631A true CN1513631A (en) | 2004-07-21 |
| CN1260025C CN1260025C (en) | 2006-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03128328 Expired - Fee Related CN1260025C (en) | 2003-07-15 | 2003-07-15 | Preparation method of nano-gold particle |
Country Status (1)
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| CN (1) | CN1260025C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302882C (en) * | 2004-12-02 | 2007-03-07 | 黄德欢 | Method for preparing nano gold solution |
| CN1302849C (en) * | 2004-12-02 | 2007-03-07 | 黄德欢 | Method for preparing supported nano gold powder |
| CN101775647A (en) * | 2010-02-10 | 2010-07-14 | 中国科学院长春应用化学研究所 | Gold nano-crystal and preparation method thereof |
| CN101725034B (en) * | 2009-12-10 | 2011-08-31 | 东华大学 | Method for in situ preparing Au modified and TiO2 compound air purified functional textile at low temperature |
| CN102189269A (en) * | 2011-04-29 | 2011-09-21 | 上海交通大学 | Method for preparing Au nanoparticles with chloroplast as template in water phase mode |
| CN102266946A (en) * | 2011-07-27 | 2011-12-07 | 厦门大学 | Method for preparing nano-golden particle |
| CN102847951A (en) * | 2012-07-24 | 2013-01-02 | 浙江理工大学 | Process for preparing gold nano particles through reduction of chloroauric acid by catalase |
| CN104907579A (en) * | 2015-06-16 | 2015-09-16 | 江苏大学 | Controllable preparation method for gold nanoparticles induced by polysaccharide derivative |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107283B (en) * | 2010-11-24 | 2013-04-24 | 沈阳工业大学 | Chemical preparation method for gold nanoparticle hydrosols |
-
2003
- 2003-07-15 CN CN 03128328 patent/CN1260025C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302882C (en) * | 2004-12-02 | 2007-03-07 | 黄德欢 | Method for preparing nano gold solution |
| CN1302849C (en) * | 2004-12-02 | 2007-03-07 | 黄德欢 | Method for preparing supported nano gold powder |
| CN101725034B (en) * | 2009-12-10 | 2011-08-31 | 东华大学 | Method for in situ preparing Au modified and TiO2 compound air purified functional textile at low temperature |
| CN101775647A (en) * | 2010-02-10 | 2010-07-14 | 中国科学院长春应用化学研究所 | Gold nano-crystal and preparation method thereof |
| CN101775647B (en) * | 2010-02-10 | 2012-06-20 | 中国科学院长春应用化学研究所 | Gold nano-crystal and preparation method thereof |
| CN102189269A (en) * | 2011-04-29 | 2011-09-21 | 上海交通大学 | Method for preparing Au nanoparticles with chloroplast as template in water phase mode |
| CN102266946A (en) * | 2011-07-27 | 2011-12-07 | 厦门大学 | Method for preparing nano-golden particle |
| CN102847951A (en) * | 2012-07-24 | 2013-01-02 | 浙江理工大学 | Process for preparing gold nano particles through reduction of chloroauric acid by catalase |
| CN102847951B (en) * | 2012-07-24 | 2015-01-28 | 浙江理工大学 | Process for preparing gold nano particles through reduction of chloroauric acid by catalase |
| CN104907579A (en) * | 2015-06-16 | 2015-09-16 | 江苏大学 | Controllable preparation method for gold nanoparticles induced by polysaccharide derivative |
| CN104907579B (en) * | 2015-06-16 | 2017-06-27 | 江苏大学 | A kind of controllable method for preparing of the golden nanometer particle of polysaccharide derivates induction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1260025C (en) | 2006-06-21 |
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