CN101406832B - Method for preparing monodisperse flower-shaped gold/platinum hybrid nano particles having different particle diameters - Google Patents
Method for preparing monodisperse flower-shaped gold/platinum hybrid nano particles having different particle diameters Download PDFInfo
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- CN101406832B CN101406832B CN2008100514584A CN200810051458A CN101406832B CN 101406832 B CN101406832 B CN 101406832B CN 2008100514584 A CN2008100514584 A CN 2008100514584A CN 200810051458 A CN200810051458 A CN 200810051458A CN 101406832 B CN101406832 B CN 101406832B
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Abstract
The invention provides a method for preparing monodisperse flower-like gold/platinum hybrid nano-particles with different particle sizes. The method adopts a green chemical method to prepare the monodisperse flower-like gold/platinum hybrid nano-particles with the assistance of sodium citrate. The method is characterized in that gold nano-particles protected by the sodium citrate are taken as seeds, and flower-like platinum shells are further grown on the surfaces of the gold nano-particles so as to prepare the monodisperse flower-like gold/platinum hybrid nano-particles. The method has the advantages of simplicity and convenience, and provides an achievable way for synthesizing the monodisperse flower-like gold/platinum hybrid nano-particles with high quality and different particle sizes. The obtained monodisperse flower-like gold/platinum hybrid nano-particles with different particle sizes of between 6 and 35 nanometers can achieve important application in the fields of fuel cells, nanometer electrochemistry and the like.
Description
Technical field
The present invention relates to the monodispersed flower-shaped gold of different-grain diameter/platinum hybrid nanometer particle process method.
Background technology
The platinum nano material is because its unique physics and chemical attribute and the extensive use in fields such as chemical sensor, biology sensor and fuel cells have been subjected to people studies widely.Many experimental evidences have proved that the catalytic efficiency of platinum nano material and selectivity height depend on its shape, composition and size.Therefore synthetic platinum nano structural material with specific morphology is significant.At present, adopt several method to synthesize and had the platinum nano material of specific morphology and catalytic performance.For example, Sun etc. have reported that a kind of simple high temperature organic facies route has synthesized monodispersed platinum cubic block (J.Am.Chem.Soc.2007,129,6974).Wang etc. have reported that electrochemical method preparation has the platinum tetrahexahedron nanosphere (Science 2007,316,732) of high-index surface.Although select the platinum nano catalyst of high-index surface to have catalytic performance efficiently, will improve the availability of platinum greatly to for example three-dimensional flower-like nanostructure of more complicated pattern by changing platinum catalyst.El-Sayed etc. have described the platinum nanometer star (J.Am.Chem.Soc.2008,130,4590) with efficient catalytic performance that a simple method prepares multi-arm.Yet, seek simple, a green chemical process and prepare gold/platinum hybrid nano particle and remain great challenge.
Summary of the invention
The objective of the invention is to propose single flower-shaped gold/platinum hybrid nano particle preparation method of dispersion of different-grain diameter.This method adopts green reducing agent, prepares single flower-shaped gold/platinum hybrid nano particle that disperses of different-grain diameter apace by simple heating.
The single step and condition of flower-shaped gold/platinum hybrid nano particle preparation method of disperseing of different-grain diameter is among the present invention:
A, at first, according to the method (list of references: Frens, G.Nature Phys.Sci.1973,241,20) of Frens, the golden nanometer particle of preparation 3-25 nanometer different-grain diameter in cone-shaped reactor;
B, the golden nanometer particle with the different-grain diameter that obtains above is a seed respectively, is green reducing agent with the ascorbic acid of 0.1M/L, with the H of 19.3mM/L
2PtCl
6Mol ratio as platinum source, platinum and gold is 2:1,0.1M/L ascorbic acid and 19.3mM/L H
2PtCl
6Volume ratio be 0.8-2:1,100 ℃ of down heating 10-20 minute, obtain single flower-shaped gold/platinum hybrid nano particle that disperses of the different-grain diameter of 6-35 nanometer.
Beneficial effect: characteristics of the present invention are to adopt green reducing agent, prepare single flower-shaped gold/platinum hybrid nano particle that disperses of the different-grain diameter of 6-35 nanometer apace by the strategy of simple heating.
Description of drawings
Fig. 1 is the transmission electron microscope figure of 35 nm of gold/platinum hybrid nano particle.
Fig. 2 is the transmission electron microscope figure of 20 nm of gold/platinum hybrid nano particle.
Fig. 3 is the transmission electron microscope figure of 6 nm of gold/platinum hybrid nano particle.
The specific embodiment
Embodiment 1:
The golden nanometer particle of a, preparation 25 nanometers
The 24.3mM/LHAuCl of 0.5-2 milliliter
4The aqueous solution joins in the 50-200 ml distilled water and is heated to boiling, adds 0.75-3 milliliter 34.3mM/L sodium citrate aqueous solution then apace, obtains the golden nanometer particle of 25 nanometers after 10 minutes in heating;
B, being seed with the golden nanometer particle that obtains above, is green reducing agent with the ascorbic acid of 0.1M/L, with the H of 19.3mM/L
2PtCl
6Mol ratio as platinum source, platinum and gold is 2:1,0.1M/L ascorbic acid and 19.3mM/L H
2PtCl
6Volume ratio be 0.8-2,100 ℃ of down heating 15 minutes, obtaining particle diameter is single flower-shaped gold/platinum hybrid nano particle that disperses of 35 nanometers.
Embodiment 2:
The golden nanometer particle of a, preparation 13 nanometers
24.3mM/LHAuCl at 2.12 milliliters
4The aqueous solution joins in 50 milliliters the distilled water and is heated to boiling, adds 5.7 milliliters of 34.3mM/L sodium citrate aqueous solutions then apace.After heating 10 minutes, obtain the golden nanometer particle of 13 nanometers;
B, being seed with the golden nanometer particle that obtains above, is green reducing agent with the ascorbic acid of 0.1M/L, with the H of 19.3mM/L
2PtCl
6Mol ratio as platinum source, platinum and gold is 2:1,0.1M/L ascorbic acid and 19.3mM/L H
2PtCl
6Volume ratio be 0.8-2,100 ℃ of down heating 15 minutes, obtain single flower-shaped gold/platinum hybrid nano particle that disperses that particle diameter is about 20 nanometers.
Embodiment 3:
The golden nanometer particle of a, preparation 3 nanometers
At 0.5-2 milliliter 24.3mM/L HAuCl
4The aqueous solution joins in the 50-200 ml distilled water, adds 0.75-3 milliliter 34.3mM/L sodium citrate aqueous solution then, adds 0.5-3 milliliter 0.1M/L sodium borohydride aqueous solution under stirring condition, and stirring spends the night obtains the golden nanometer particle of about 3 nanometers;
B, being seed with the golden nanometer particle that obtains above, is green reducing agent with the ascorbic acid of 0.1M/L, with the H of 19.3mM/L
2PtCl
6Mol ratio as platinum source, platinum and gold is 2:1,0.1M/L ascorbic acid and 19.3mM/L H
2PtCl
6Volume ratio be 0.8-2,100 ℃ of down heating 15 minutes, obtain single flower-shaped gold/platinum hybrid nano particle that disperses that particle diameter is about 6 nanometers.
Claims (1)
1. the monodispersed flower-shaped gold of different-grain diameter/platinum hybrid nanometer particle process method is characterized in that step and condition are as follows:
A, at first, according to the method for Frens, the golden nanometer particle of preparation 3-25 nanometer different-grain diameter in cone-shaped reactor;
B, the golden nanometer particle with the different-grain diameter that obtains above is a seed respectively, is green reducing agent with the ascorbic acid of 0.1M/L, with the H of 19.3mM/L
2PtCl
6Mol ratio as platinum source, platinum and gold is 2:1,0.1M/L ascorbic acid and 19.3mM/L H
2PtCl
6Volume ratio be 0.8-2:1,100 ℃ of down heating 10-20 minute, obtain single flower-shaped gold/platinum hybrid nano particle that disperses of the different-grain diameter of 6-35 nanometer.
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| CN2008100514584A CN101406832B (en) | 2008-11-24 | 2008-11-24 | Method for preparing monodisperse flower-shaped gold/platinum hybrid nano particles having different particle diameters |
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| CN101406832A CN101406832A (en) | 2009-04-15 |
| CN101406832B true CN101406832B (en) | 2011-01-19 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019179B (en) * | 2009-09-17 | 2012-12-26 | 国家纳米科学中心 | Gold-core/platinum-shell nano bar analogue enzyme solution and preparation method thereof |
| CN101875131B (en) * | 2009-12-15 | 2012-07-04 | 武汉大学 | Preparation method of platinum nanoparticles |
| CN103143718A (en) * | 2011-12-07 | 2013-06-12 | 中国科学院大连化学物理研究所 | Platinum nanometer material and preparation method thereof |
| CN106541148B (en) * | 2016-11-25 | 2018-05-25 | 安徽师范大学 | A kind of plation nanometer bipyramid frame, preparation method and applications |
| CN107755689B (en) * | 2017-09-22 | 2019-09-03 | 安康德美（中山）纳米科技有限公司 | Bimetal nano particles containing Pt-Au and preparation method thereof |
| CN111569871B (en) * | 2020-05-27 | 2023-03-31 | 山西大同大学 | Preparation method of flower-shaped structure platinum nano material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005233744A (en) * | 2004-02-19 | 2005-09-02 | Nippon Sheet Glass Co Ltd | Metal colloidal particles and manufacturing method thereof |
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| JP2005233744A (en) * | 2004-02-19 | 2005-09-02 | Nippon Sheet Glass Co Ltd | Metal colloidal particles and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| Gang Chang.In Situ Chemical Reductive Growth of Platinum Nanoparticles on Indium Tin Oxide.《J. Phys. Chem. B 》.2006, * |
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