CN1686649A - Preparation method of nuclear shell structured nano-gold copper powder - Google Patents
Preparation method of nuclear shell structured nano-gold copper powder Download PDFInfo
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- CN1686649A CN1686649A CN 200510049662 CN200510049662A CN1686649A CN 1686649 A CN1686649 A CN 1686649A CN 200510049662 CN200510049662 CN 200510049662 CN 200510049662 A CN200510049662 A CN 200510049662A CN 1686649 A CN1686649 A CN 1686649A
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Abstract
A process for preparing the Au-Cu nanoparticles with kernel-shell structure includes preparing the aqueous solution of chlorauric acid from distilled water, adding polyvinyl pyrrolidone and sodium laurysulfate, adding the aqueous solution of hydrazine hydrate until pH=6.5-7.5 to obtain solution A, preparing the aqueous solution of copper salt from distilled water, adding ammonia water until the solution becomes clear, adding polyvinyl pyrrolidone and sodium laurylsulfate to obtain solution B, heating A and B, adding B to A while stirring, regulating pH=8.5-9.5, centrifugal separation in N2 or argon atmosphere, washing and vacuum drying.
Description
Technical field
The present invention relates to the preparation method of nuclear shell structured nano-gold copper powder.
Background technology
A large amount of simple substance nanometer materials have not only been prepared in the development of nanometer material science, have also prepared a lot of nano composite materials, comprising using the conventional method difficult to obtain material.Simultaneously, the application of nano material also is subjected to the attention of height, has developed the new application of nano material.Nano material with nucleocapsid structure also is one of emphasis of studying of people.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of nuclear shell structured nano-gold copper powder.
The preparation method of nuclear shell structured nano-gold copper powder of the present invention may further comprise the steps:
1) in distilled water, adds gold chloride, be mixed with the aqueous solution of chloraurate that concentration is 0.001～0.01mol/L, treat that gold chloride dissolving back adds polyvinylpyrrolidone and lauryl sodium sulfate, the mass ratio of gold chloride, polyvinylpyrrolidone, lauryl sodium sulfate is 0.01～5.0: 0.02～10.0: 0.0001～5.0;
2) solution that step 1) is obtained is heated to 30～70 ℃, and adding concentration is 0.01～5.0% hydrazine hydrate aqueous solution in stirring, when the pH value reaches 6.5～7.5, stops to add hydrazine hydrate aqueous solution, continues to stir 20～30 minutes, obtains nano-Au solution;
3) in distilled water, add mantoquita, be mixed with the copper salt solution that concentration is 0.001～0.01mol/L, treat that the slow adding in mantoquita dissolving back mass concentration is 0.5～5.0% ammoniacal liquor, solution becomes muddiness when beginning to add ammoniacal liquor, adding with ammoniacal liquor clears up gradually, and stops to add ammoniacal liquor when solution becomes fully after limpid;
4) in the solution that step 3) obtains, add polyvinylpyrrolidone and lauryl sodium sulfate, the mass ratio of mantoquita, polyvinylpyrrolidone, lauryl sodium sulfate is 0.01～5.0: 0.02～10.0: 0.001～5.0, mixed solution is heated to 50～80 ℃;
5) with step 2) nano-Au solution be heated to 50～80 ℃, the solution that in stirring step 4) is obtained is added in the nano-Au solution, the mol ratio of gold, copper is 1: 1～1: 10 in the gained mixed liquor, regulate pH value to 8.5～9.5 with hydrazine hydrate, continue to stir 20～60 minutes, obtain having nuclear shell structured nano-gold copper suspension;
6) suspension that step 5) is obtained carries out centrifugation under nitrogen or argon gas atmosphere, cleans with distilled water and ethanol;
7) the nm of gold copper powder after will cleaning gets final product in 40～80 ℃ of following vacuum drying.
Above-mentioned mantoquita can be copper sulphate or copper nitrate.
Because golden salt reduction back forms nano particle, gold particle is little, preferentially becomes the nucleation site of copper reduction, thereby forms nuclear shell structured nano-gold copper powder.Preparation technology of the present invention is simple, and the granularity of nm of gold nuclear is little, is 5 to 15nm, and the thickness of copper shell is adjustable; Separate under protective atmosphere, clean and drying, nanometer copper is difficult for taking place oxidation.
Description of drawings
Fig. 1 is the EDS spectrum of the nm of gold copper powder of embodiment 1 preparation;
Fig. 2 is the X-ray diffractogram of the nm of gold copper powder of embodiment 2 preparations;
Fig. 3 is the EDS spectrum of the nm of gold copper powder of embodiment 2 preparations;
Fig. 4 is the X-ray diffractogram of the nm of gold copper powder of embodiment 3 preparations.
The specific embodiment
Embodiment 1
1) in distilled water, adds gold chloride (HAuCl
44H
2O), being mixed with concentration is the aqueous solution of chloraurate 50ml of 0.00125mol/L, treats that gold chloride dissolving back adds polyvinylpyrrolidone 2g, lauryl sodium sulfate 0.14g;
2) solution with step 1) is heated to 70 ℃, and adding concentration is 2.5% hydrazine hydrate aqueous solution in stirring, when the pH value reaches 7, stops to add hydrazine hydrate aqueous solution, continues to stir 20～30 minutes, obtains nano-Au solution;
3) add copper nitrate in distilled water, compound concentration is the copper nitrate aqueous solution 50ml of 0.00125mol/L, treats that it is 2.5% ammoniacal liquor that copper nitrate dissolving back slowly adds mass concentration, stops to add ammoniacal liquor when solution becomes fully after limpid;
4) in the solution that step 3) obtains, add 1g polyvinylpyrrolidone, 0.01g lauryl sodium sulfate, mixed solution is heated to 50 ℃;
5) with step 2) nano-Au solution be heated to 50 ℃, the solution that in stirring step 4) is obtained joins step 2) in the nano-Au solution that obtains, the mol ratio of gold, copper is 1: 10 in the gained mixed liquor, regulate the pH value with hydrazine hydrate, make the pH value remain on 9, add and finish back continuation stirring 30 minutes, obtain having nuclear shell structured nano-gold copper suspension;
6) suspension that step 5) is obtained carries out centrifugation under argon gas atmosphere, cleans 3 times with ethanol with distilled water, back earlier;
7) the nm of gold copper powder after the cleaning is put into vacuum drying chamber, and is dry under 70 ℃, obtains nuclear shell structured nano-gold copper powder.
Fig. 1 is the EDS spectrum of the nm of gold copper powder of this embodiment preparation, and the atomic percent of copper, gold is 55.4: 45.6, considers the nucleocapsid structure of golden copper, and the actual ratio of copper, gold showed not Restore All of copper less than 1: 1 of raw material.
Embodiment 2
1) in distilled water, adds gold chloride (HAuCl
44H
2O), compound concentration is the aqueous solution of chloraurate 50ml of 0.00125mol/L, treats that gold chloride dissolving back adds polyvinylpyrrolidone 2g, lauryl sodium sulfate 0.14g;
2) solution with step 1) is heated to 70 ℃, and adding concentration is 2.5% hydrazine hydrate aqueous solution in stirring, when the pH value reaches 7, stops to add hydrazine hydrate aqueous solution, continues to stir 30 minutes, obtains nano-Au solution;
3) add copper nitrate in distilled water, compound concentration is the copper nitrate aqueous solution 50ml of 0.00125mol/L, treats that it is 2.5% ammoniacal liquor that copper nitrate dissolving back slowly adds mass concentration, stops to add ammoniacal liquor when solution becomes fully after limpid;
4) in the solution that step 3) obtains, add 1g polyvinylpyrrolidone, 0.01g lauryl sodium sulfate, mixed solution is heated to 55 ℃;
5) with step 2) nano-Au solution be heated to 55 ℃, the solution that in stirring step 4) is obtained joins step 2) in the solution that obtains, the mol ratio of gold, copper is 1: 10 in the gained mixed liquor, regulate the pH value with hydrazine hydrate, make the pH value remain on 9, add and finish back continuation stirring 60 minutes, obtain having nuclear shell structured nano-gold copper suspension;
6) suspension that step 5) is obtained carries out centrifugation under argon gas atmosphere, cleans 3 times with ethanol with distilled water, back earlier;
7) the nm of gold copper powder after the cleaning is put into vacuum drying chamber, and is dry under 70 ℃, obtains nuclear shell structured nano-gold copper powder;
Fig. 2 is the X-ray diffractogram of the nm of gold copper powder of this embodiment preparation, and the diffraction maximum of gold, copper marks in the drawings, and the granularity of gold is 12nm, and the granularity of copper is 55nm;
Fig. 3 is the EDS spectrum of the nm of gold copper powder of this embodiment preparation, and the atomic percent of copper, gold is 65.1: 34.9, considers the nucleocapsid structure of golden copper, and the actual ratio of copper, gold is suitable with 1: 1 proportioning of raw material.
Embodiment 3
1) in distilled water, adds gold chloride (HAuCl
44H
2O), being mixed with concentration is the aqueous solution of chloraurate 50ml of 0.0025mol/L, treats that gold chloride dissolving back adds polyvinylpyrrolidone 1g, lauryl sodium sulfate 0.14g;
2) solution with step 1) is heated to 70 ℃, and adding concentration is 0.5% hydrazine hydrate aqueous solution in stirring, when the pH value reaches 7, stops to add hydrazine hydrate aqueous solution, continues to stir 20～30 minutes, obtains nano-Au solution;
3) add copper sulphate in distilled water, being mixed with concentration is the copper sulfate solution 50ml of 0.005mol/L, treats that it is 2.5% ammoniacal liquor that copper sulphate dissolving back slowly adds mass concentration, stops to add ammoniacal liquor when solution becomes fully after limpid;
4) in the solution that step 3) obtains, add 1g polyvinylpyrrolidone, 0.5g lauryl sodium sulfate;
5) simultaneously with step 2), 4) solution that obtains is heated to 70 ℃, the solution that step 4) is obtained joins step 2 in stirring) in the solution that obtains, the mol ratio of gold, copper is 1: 2 in the mixed liquor, regulate the pH value with hydrazine hydrate, make the pH value remain on 9, add and finish back continuation stirring 60 minutes, obtain having nuclear shell structured nano-gold copper suspension;
6) suspension that step 5) is obtained carries out centrifugation under nitrogen atmosphere, cleans 3 times with ethanol with distilled water, back earlier;
7) the nm of gold copper powder after will cleaning is put into vacuum drying chamber, 70 ℃ dry down, obtaining gold/copper atom percentage is 1: 2 nuclear shell structured nano-gold copper powder.
Fig. 4 is the X-ray diffractogram of the nm of gold copper powder of this embodiment preparation, and the diffraction maximum of gold, copper marks in the drawings, and the granularity of gold is 14nm, and the granularity of copper is 35nm.
Embodiment 4
1) in distilled water, adds gold chloride (HAuCl
44H
2O), being mixed with concentration is the aqueous solution of chloraurate 50ml of 0.0025mol/L, treats that gold chloride dissolving back adds polyvinylpyrrolidone 1g, lauryl sodium sulfate 0.14g;
2) solution with step 1) is heated to 70 ℃, and adding concentration is 0.5% hydrazine hydrate aqueous solution in stirring, when the pH value reaches 7, stops to add hydrazine hydrate aqueous solution, continues to stir 30 minutes, obtains nano-Au solution;
3) add copper nitrate in distilled water, being mixed with concentration is the copper nitrate aqueous solution 50ml of 0.0075mol/L, treats that it is 2.5% ammoniacal liquor that copper nitrate dissolving back slowly adds mass concentration, stops to add ammoniacal liquor when solution becomes fully after limpid;
4) add 1g polyvinylpyrrolidone, 0.5g lauryl sodium sulfate in the solution that step 3) is obtained;
5) simultaneously with step 2), 4) solution that obtains is heated to 70 ℃, the solution that step 4) is obtained joins step 2 in stirring) in the solution that obtains, the mol ratio of gold, copper is 1: 3 in the mixed liquor, regulate the pH value with hydrazine hydrate, make the pH value remain on 9, add and finish back continuation stirring 60 minutes, obtain having nuclear shell structured nano-gold copper suspension;
6) suspension that step 5) is obtained carries out centrifugation under nitrogen atmosphere, cleans 3 times with ethanol with distilled water, back earlier;
7) the nm of gold copper powder after will cleaning is put into vacuum drying chamber, 70 ℃ dry down, obtaining gold/copper atom percentage is 1: 3 nuclear shell structured nano-gold copper powder.
Claims (2)
1. the preparation method of nuclear shell structured nano-gold copper powder is characterized in that may further comprise the steps:
1) in distilled water, adds gold chloride, be mixed with the aqueous solution of chloraurate that concentration is 0.001～0.01mol/L, treat that gold chloride dissolving back adds polyvinylpyrrolidone and lauryl sodium sulfate, the mass ratio of gold chloride, polyvinylpyrrolidone, lauryl sodium sulfate is 0.01～5.0: 0.02～10.0: 0.0001～5.0;
2) solution that step 1) is obtained is heated to 30～70 ℃, and adding concentration is 0.01～5.0% hydrazine hydrate aqueous solution in stirring, when the pH value reaches 6.5～7.5, stops to add hydrazine hydrate aqueous solution, continues to stir 20～30 minutes, obtains nano-Au solution;
3) in distilled water, add mantoquita, be mixed with the copper salt solution that concentration is 0.001～0.01mol/L, treat that the slow adding in mantoquita dissolving back mass concentration is 0.5～5.0% ammoniacal liquor, solution becomes muddiness when beginning to add ammoniacal liquor, adding with ammoniacal liquor clears up gradually, and stops to add ammoniacal liquor when solution becomes fully after limpid;
4) in the solution that step 3) obtains, add polyvinylpyrrolidone and lauryl sodium sulfate, the mass ratio of mantoquita, polyvinylpyrrolidone, lauryl sodium sulfate is 0.01～5.0: 0.02～10.0: 0.001～5.0, mixed solution is heated to 50～80 ℃;
5) with step 2) nano-Au solution be heated to 50～80 ℃, the solution that in stirring step 4) is obtained is added in the nano-Au solution, the mol ratio of gold, copper is 1: 1～1: 10 in the gained mixed liquor, regulate pH value to 8.5～9.5 with hydrazine hydrate, continue to stir 20～60 minutes, obtain having nuclear shell structured nano-gold copper suspension;
6) suspension that step 5) is obtained carries out centrifugation under nitrogen or argon gas atmosphere, cleans with distilled water and ethanol;
7) the nm of gold copper powder after will cleaning gets final product in 40～80 ℃ of following vacuum drying.
2. the preparation method of nuclear shell structured nano-gold copper powder according to claim 1 is characterized in that mantoquita is copper sulphate or copper nitrate.
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| CN101522345A (en) * | 2006-08-30 | 2009-09-02 | 尤米科尔股份公司及两合公司 | Core/shell-type catalyst particles comprising metal or ceramic core materials and methods for their preparation |
| CN102059346A (en) * | 2010-12-08 | 2011-05-18 | 厦门大学 | Method for preparing aurum-manganese dioxide nuclear shell structure nano particle |
| CN102398043A (en) * | 2011-11-23 | 2012-04-04 | 中国科学院合肥物质科学研究院 | Method for preparing metal nanomaterial with simulated cell structure |
| CN102407340A (en) * | 2011-04-18 | 2012-04-11 | 中国人民解放军总后勤部军需装备研究所 | Preparation method of micro powder with silver/carbon nuclear shell structure |
| CN102554252A (en) * | 2010-12-17 | 2012-07-11 | 中国科学技术大学 | Synthesizing method of porous bimetal nanostructure |
| CN102728847A (en) * | 2011-04-02 | 2012-10-17 | 中国科学院大连化学物理研究所 | Preparation method for gold-copper bimetal nanospheres |
| CN103769598A (en) * | 2013-10-08 | 2014-05-07 | 东江环保股份有限公司 | Method for stably preparing nano-copper powder |
| CN113751039A (en) * | 2021-09-17 | 2021-12-07 | 山西大学 | Alkynylation catalyst for synthesizing propiolic alcohol, preparation method and application |
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| JP2728726B2 (en) * | 1989-05-10 | 1998-03-18 | 正同化学工業株式会社 | Method for producing fine copper powder |
| US5179056A (en) * | 1991-05-06 | 1993-01-12 | Union Carbide Chemicals & Plastics Technology Corporation | Production of alkenyl alkanoate catalysts |
| CN1219439C (en) * | 2003-11-03 | 2005-09-21 | 上海维来新材料科技有限公司 | Nano hud-type bimetal powder of copper and stannum, preparing method and application |
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| CN101522345A (en) * | 2006-08-30 | 2009-09-02 | 尤米科尔股份公司及两合公司 | Core/shell-type catalyst particles comprising metal or ceramic core materials and methods for their preparation |
| CN102059346B (en) * | 2010-12-08 | 2012-10-03 | 厦门大学 | Method for preparing aurum-manganese dioxide nuclear shell structure nano particle |
| CN102059346A (en) * | 2010-12-08 | 2011-05-18 | 厦门大学 | Method for preparing aurum-manganese dioxide nuclear shell structure nano particle |
| CN102554252A (en) * | 2010-12-17 | 2012-07-11 | 中国科学技术大学 | Synthesizing method of porous bimetal nanostructure |
| CN102728847A (en) * | 2011-04-02 | 2012-10-17 | 中国科学院大连化学物理研究所 | Preparation method for gold-copper bimetal nanospheres |
| CN102407340A (en) * | 2011-04-18 | 2012-04-11 | 中国人民解放军总后勤部军需装备研究所 | Preparation method of micro powder with silver/carbon nuclear shell structure |
| CN102398043A (en) * | 2011-11-23 | 2012-04-04 | 中国科学院合肥物质科学研究院 | Method for preparing metal nanomaterial with simulated cell structure |
| CN102398043B (en) * | 2011-11-23 | 2014-04-30 | 中国科学院合肥物质科学研究院 | Method for preparing metal nanomaterial with simulated cell structure |
| CN103769598A (en) * | 2013-10-08 | 2014-05-07 | 东江环保股份有限公司 | Method for stably preparing nano-copper powder |
| CN113751039A (en) * | 2021-09-17 | 2021-12-07 | 山西大学 | Alkynylation catalyst for synthesizing propiolic alcohol, preparation method and application |
| CN113813973A (en) * | 2021-09-17 | 2021-12-21 | 山西大学 | Nano gold confinement copper-based core-shell structure catalyst and preparation method and application thereof |
| CN113751039B (en) * | 2021-09-17 | 2022-07-19 | 山西大学 | Alkynylation catalyst for synthesizing propiolic alcohol, preparation method and application |
| CN113813973B (en) * | 2021-09-17 | 2023-03-10 | 山西大学 | Nano gold confinement copper-based core-shell structure catalyst and preparation method and application thereof |
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