CN105252019A - Preparation method of highly-dispersed spherical nano-silver - Google Patents
Preparation method of highly-dispersed spherical nano-silver Download PDFInfo
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- CN105252019A CN105252019A CN201510805813.2A CN201510805813A CN105252019A CN 105252019 A CN105252019 A CN 105252019A CN 201510805813 A CN201510805813 A CN 201510805813A CN 105252019 A CN105252019 A CN 105252019A
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Abstract
The invention discloses a preparation method of highly-dispersed spherical nano-silver. The preparation method specifically comprises the steps of (1), preparing respective solutions of needed raw materials composed of soluble silver salt silver nitrate; reducing agents, namely sodium citrate and ascorbic acid; auxiliary agents, namely sodium chloride; and surface active agents, namely polyvinyl pyrrolidone (PVP) through double-deionized water; (2), weighing the silver nitrate solution, the sodium citrate solution, the sodium chloride solution, the ascorbic acid solution and the PVP solution according to the molar ratio of (2-15) to (8-16) to (4-16) to (5-20) to 160; (3), adding the ascorbic acid solution and the PVP solution into the double-deionized water in water bath, carrying out mixed water bath for 1-3 minutes, mixing the silver nitrate solution, the sodium citrate solution and the sodium chloride solution according to a certain ratio, stirring the mixture for 4-8 minutes and fast adding the mixture into the double-deionized water containing the ascorbic acid solution and the PVP solution in water bath; (4), keeping the water bath temperature unchanged, heating and stirring the latest mixture for 1 hour, then fast cooling the latest mixture to indoor temperature and carrying out high-speed centrifugal washing for three times to obtain the highly-dispersed spherical nano-silver. The preparation method has the advantages that the simplicity is high, the operation is easy, obtained spherical nano-silver particles are uniformly dispersed and are good in stability, and the sphere yield is high.
Description
Technical field
The present invention relates to a kind of preparation method of high dispersive spherical nano-silver, utilizing when adding surfactant the dual reducting agents of adjuvant to reduce silver nitrate to prepare the method for high dispersive spherical nano-silver specifically.
Background technology
Nano Silver is a kind of emerging functional material, and have higher specific area, conductance is high, and surface-active is better, and optical property is excellent, is widely used as catalyst material, antistatic material, SERS and biology sensor material etc.In addition, Nano Silver also has excellent performance in medicinal antibiosis, deodorizing, data storing, magnetic device etc.Because the above-mentioned performance of silver nano-grain and the size/pattern of particle are closely related, therefore how obtaining size/stable appearance, uniformly nano-Ag particles is simply, efficiently the key of its extensive use.At present, the methods such as polyol process, microwave assisting method, template, electrochemical process are used to prepare the nano silver particles of different-shape, as rod, line, sheet, polyhedron dendroid, ball etc.From practical application, spherical silver nano-grain is the most stable.In the method for countless synthesizing spherical Nano Silver, great majority adopt organic solvent could prepare high dispersive spherical nano-silver, but organic solvent is unfavorable for their application in fields such as biologies.Natrium citricum is a kind of biocompatibility part, and is easily replaced by other biological molecule, antibody etc. to realize multi-functional finishing, is therefore had broad application prospects by the spherical nano-silver of natrium citricum ligands stabilize.
At present, the method that use reduction of sodium citrate soluble silver salt prepares nano-Ag particles is more, but most methods is used to prepare sheet, rod etc., and the successful case of preparation high dispersive spherical silver nano particle is less.Although in some documents, in aqueous phase, prepare ball shaped nano Argent grain, due to the characteristic of silver nano-grain, make its activity in water higher, as easy as rolling off a logly cause the reunion of silver nano-grain thus reduce its use value.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method synthesizing high dispersive ball shaped nano Argent grain in aqueous phase, this preparation method can prepare and has polymolecularity, good stability, monodispersed spherical silver nano particle, and the method is simple to operate, cost is lower.
A preparation method for dispersing ball Nano Silver, this preparation method comprises the following steps:
(1) use secondary deionized water that needed raw material soluble silver salt silver nitrate, natrium citricum, sodium chloride, ascorbic acid, PVP are mixed with molar concentration respectively for (2-6) mM liquor argenti nitratis ophthalmicus, (2-7) mM sodium citrate solution, (10-30) mM sodium chloride solution, (0.025-0.2) M ascorbic acid solution, 0.2MPVP solution;
(2) in molar ratio (2-15): (8-16): (4-16): (5-20): the ratio of 160 takes liquor argenti nitratis ophthalmicus, sodium citrate solution, sodium chloride solution, ascorbic acid solution, PVP solution respectively;
(3) ascorbic acid solution and PVP solution joined just in the secondary deionized water of water-bath, mix water-bath 1-3min, by join rapidly after silver salt solution, sodium citrate solution, sodium chloride solution by a certain percentage mix and blend 3-8min just in water-bath containing in the secondary deionized water of ascorbic acid and PVP solution;
(4) keep bath temperature constant, coldly rapidly after adding thermal agitation (60-90) min go to room temperature, wash three times through high speed centrifugation, high dispersive spherical nano-silver can be obtained.
Accompanying drawing explanation
Fig. 1 is the transmission electron microscope photo of the high dispersive spherical nano-silver of case study on implementation 1 gained.
Fig. 2 is the uv-visible absorption spectroscopy figure that Fig. 1 prepares gained spherical nano-silver.
Fig. 3 is the transmission electron microscope photo of the high dispersive spherical nano-silver of case study on implementation 5 gained.
Fig. 4 is the uv-visible absorption spectroscopy figure that Fig. 3 prepares gained spherical nano-silver.
Detailed description of the invention
Case study on implementation 1
First by glassware (250ml, 50ml beaker) used ultrasonic cleaning instrument cleaning, then dry up rear for subsequent use with deionized water and absolute ethyl alcohol flushing.Use secondary deionized water by needed raw material silver nitrate, natrium citricum, sodium chloride, Vitamin C, PVP(polyvinylpyrrolidone) be mixed with solution respectively, wherein the concentration of liquor argenti nitratis ophthalmicus is 3mM, the concentration of sodium citrate solution is 2mM, the concentration of sodium chloride is 40mM, ascorbic acid concentrations is 0.05M, PVP(polyvinylpyrrolidone) concentration is 0.2M.97ml secondary deionized water to be joined in 250ml beaker and put it in water-bath and control bath temperature 90 DEG C of heating a period of times.Join just in the secondary deionized water of heating water bath, heat 1min by 0.1ml ascorbic acid solution (50mM) with 2.5mlPVP(0.2M).Then 0.5ml liquor argenti nitratis ophthalmicus (3mM) is joined in the 50ml beaker containing 2.3ml deionized water and stir, then add 2ml sodium citrate solution (2mM), 0.2ml sodium chloride solution (40mM), pour into rapidly after being uniformly mixed 4min in the secondary deionized water just containing ascorbic acid and PVP at heating water bath.Finally keep bath temperature at 90 DEG C of heating 60min, be cooled to room temperature then rapidly, wash three times through high speed centrifugation, the spherical nano-silver of high dispersive can be obtained, as shown in Figure 1, uv-visible absorption spectroscopy figure as indicated with 2 for the transmission electron microscope photo of spherical nano-silver.
Case study on implementation 2
The difference of the implementation case and case study on implementation is that the concentration of silver nitrate is 2mM, and all the other conditions are all identical with case study on implementation 1, can obtain the spherical nano-silver of high dispersive equally.
Case study on implementation 3
The difference of the implementation case and case study on implementation is that the concentration of silver nitrate is 4mM, and all the other conditions are all identical with case study on implementation 1, can obtain the spherical nano-silver of high dispersive equally.
Case study on implementation 4
The difference of the implementation case and case study on implementation is that the concentration of silver nitrate is 6mM, and all the other conditions are all identical with case study on implementation 1, can obtain the spherical nano-silver of high dispersive equally.
Case study on implementation 5
First by glassware (250ml, 50ml beaker) used ultrasonic cleaning instrument cleaning, then dry up rear for subsequent use with deionized water and absolute ethyl alcohol flushing.Use secondary deionized water by needed raw material silver nitrate, natrium citricum, sodium chloride, ascorbic acid, PVP(polyvinylpyrrolidone) be mixed with solution respectively, wherein the concentration of liquor argenti nitratis ophthalmicus is 6mM, the concentration of sodium citrate solution is 4mM, the concentration of sodium chloride is 40mM, ascorbic acid concentrations is 0.05M, PVP(polyvinylpyrrolidone) concentration is 0.2M.97ml secondary deionized water to be joined in 250ml beaker and put it in water-bath and control bath temperature 100 DEG C of heating a period of times.Join just in the secondary deionized water of heating water bath, heat 2min by 0.15ml ascorbic acid solution (50mM) with 2.0mlPVP(0.2M).Then 0.5ml liquor argenti nitratis ophthalmicus (6mM) is joined in the 50ml beaker containing 2.3ml deionized water and stir, then add 2ml sodium citrate solution (4mM), 0.2ml sodium chloride solution (40mM), pour into rapidly after being uniformly mixed 6min in the secondary deionized water just containing ascorbic acid and PVP at heating water bath.Finally keep bath temperature at 100 DEG C of heating 60min, be cooled to room temperature then rapidly, wash three times through high speed centrifugation, the spherical nano-silver of high dispersive can be obtained, as shown in Figure 3, uv-visible absorption spectroscopy figure as indicated at 4 for the transmission electron microscope photo of spherical nano-silver.
Case study on implementation 6
The difference of case study on implementation and case study on implementation is the concentration of natrium citricum is 5mM, and all the other conditions are all identical with case study on implementation 5, can obtain the spherical nano-silver of high dispersive equally.
Case study on implementation 7
First by glassware (250ml, 50ml beaker) used ultrasonic cleaning instrument cleaning, then dry up rear for subsequent use with deionized water and absolute ethyl alcohol flushing.Use secondary deionized water by needed raw material silver nitrate, natrium citricum, sodium chloride, ascorbic acid, PVP(polyvinylpyrrolidone) be mixed with solution respectively, wherein the concentration of liquor argenti nitratis ophthalmicus is 6mM, the concentration of sodium citrate solution is 4mM, the concentration of sodium chloride is 10mM, ascorbic acid concentrations is 0.05M, PVP(polyvinylpyrrolidone) concentration is 0.2M.100ml secondary deionized water to be joined in 250ml beaker and put it in water-bath and control bath temperature 100 DEG C of heating a period of times.0.1ml ascorbic acid solution (50mM) joined and just in the secondary deionized water of heating water bath, heats 2min.Then 0.5ml liquor argenti nitratis ophthalmicus (6mM) is joined in the 50ml beaker containing 5ml deionized water and stir, then add 2ml sodium citrate solution (4mM), 0.2ml sodium chloride solution (40mM) and 2mlPVP solution (0.2M), pour into rapidly after being uniformly mixed 8min and just contain in the secondary deionized water of ascorbic acid at heating water bath.Finally keep bath temperature at 100 DEG C of heating 90min, be cooled to room temperature then rapidly, wash three times through high speed centrifugation, the spherical nano-silver of high dispersive can be obtained.
Case study on implementation 8
The difference of case study on implementation and case study on implementation is the concentration of sodium chloride is 30mM, and all the other conditions are all identical with case study on implementation 7, can obtain the spherical nano-silver of high dispersive equally.
Case study on implementation 9
First by glassware (250ml, 50ml beaker) used ultrasonic cleaning instrument cleaning, then dry up rear for subsequent use with deionized water and alcohol rinse.Use secondary deionized water by needed raw material silver nitrate, natrium citricum, sodium chloride, ascorbic acid, PVP(polyvinylpyrrolidone) be mixed with solution respectively, wherein the concentration of liquor argenti nitratis ophthalmicus is 6mM, the concentration of sodium citrate solution is 4mM, the concentration of sodium chloride is 40mM, ascorbic acid concentrations is 0.025M, PVP(polyvinylpyrrolidone) concentration is 0.2M.90ml secondary deionized water to be joined in 250ml beaker and put it in water-bath and control bath temperature 100 DEG C of heating a period of times.0.1ml ascorbic acid solution (0.025mM) and 0.5mlPVP solution (0.2M) joined and just in the secondary deionized water of heating water bath, heats 30 seconds.Then 0.5ml liquor argenti nitratis ophthalmicus (6mM) is joined in the 50ml beaker containing 5ml deionized water and stir, then add 2ml sodium citrate solution (4mM), 0.3ml sodium chloride solution (40mM), pour into rapidly after being uniformly mixed 5min in the secondary deionized water just containing ascorbic acid and PVP at heating water bath.Finally keep bath temperature at 100 DEG C of heating 70min, be cooled to room temperature then rapidly, wash three times through high speed centrifugation, the spherical nano-silver of high dispersive can be obtained.
Claims (1)
1. a preparation method for high dispersive spherical nano-silver, is characterized in that comprising the following steps:
(1) secondary deionized water is used by required raw material soluble silver salt silver nitrate, reducing agent natrium citricum and ascorbic acid, adjuvant sodium chloride, surfactant PVP(polyvinylpyrrolidone) be mixed with molar concentration respectively for (2-6) mM liquor argenti nitratis ophthalmicus, (2-7) mM sodium citrate solution, (10-30) mM sodium chloride solution, (0.025-0.2) M ascorbic acid solution, 0.2MPVP(polyvinylpyrrolidone) solution;
(2) in molar ratio (2-15): (8-16): (4-16): (5-20): the ratio of 160 takes silver salt solution, sodium citrate solution, sodium chloride solution, ascorbic acid solution, PVP solution respectively;
(3) by ascorbic acid solution and PVP(polyvinylpyrrolidone) solution joins and just in the secondary deionized water of water-bath, mixes water-bath 1-3min, by join rapidly after liquor argenti nitratis ophthalmicus, sodium citrate solution, sodium chloride solution by a certain percentage mix and blend 3-8min just in water-bath containing in the secondary deionized water of ascorbic acid solution;
(4) keep bath temperature constant, coldly rapidly after adding thermal agitation (60-90) min go to room temperature, wash three times through high speed centrifugation, high dispersive spherical nano-silver can be obtained.
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Cited By (12)
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| CN106493385A (en) * | 2016-10-25 | 2017-03-15 | 中国科学院合肥物质科学研究院 | The preparation method of silver-colored triangular nano piece |
| CN107377990A (en) * | 2017-06-30 | 2017-11-24 | 北京师范大学 | A kind of preparation method of trough of belt Nano silver piece package assembly |
| CN108580919A (en) * | 2018-03-08 | 2018-09-28 | 温州大学 | Preparation method, surface-enhanced Raman detection probe and its application of the mesoporous gold nano structural material of galactic nucleus |
| CN108593607A (en) * | 2018-01-12 | 2018-09-28 | 中国计量大学 | A kind of preparation method of nickel foam/GO/ nano silver SERS substrates |
| CN109696428A (en) * | 2019-01-14 | 2019-04-30 | 华南理工大学 | A kind of method of silver nano-grain aggregation enhancing Rhodamine B isothiocyanate fluorescence intensity |
| CN110385446A (en) * | 2019-09-06 | 2019-10-29 | 青岛大学 | Continuous process preparation method of nano-silver particles |
| CN110539003A (en) * | 2019-08-09 | 2019-12-06 | 无锡英特派金属制品有限公司 | Production method of palladium powder for removing palladium mirror |
| CN111257303A (en) * | 2020-04-22 | 2020-06-09 | 张维 | Detection method for detecting dioxin and polychlorinated biphenyl |
| CN111922358A (en) * | 2020-09-24 | 2020-11-13 | 东北大学 | Method for synthesizing nano silver with controllable morphology by reduction at normal temperature |
| CN114160785A (en) * | 2021-11-17 | 2022-03-11 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Preparation method of nano-silver solution with controllable mild conditions |
| CN115252884A (en) * | 2022-07-11 | 2022-11-01 | 湖北工业大学 | Powder composition and application thereof in preparation of pet wound powder dressing |
| CN115364701A (en) * | 2022-08-22 | 2022-11-22 | 哈尔滨工业大学 | Preparation method of in-situ synthesized nano-silver PVDF (polyvinylidene fluoride) antibacterial ultrafiltration membrane |
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Cited By (16)
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| CN106493385A (en) * | 2016-10-25 | 2017-03-15 | 中国科学院合肥物质科学研究院 | The preparation method of silver-colored triangular nano piece |
| CN107377990A (en) * | 2017-06-30 | 2017-11-24 | 北京师范大学 | A kind of preparation method of trough of belt Nano silver piece package assembly |
| CN107377990B (en) * | 2017-06-30 | 2019-06-04 | 北京师范大学 | A kind of preparation method of trough of belt Nano silver piece package assembly |
| CN108593607A (en) * | 2018-01-12 | 2018-09-28 | 中国计量大学 | A kind of preparation method of nickel foam/GO/ nano silver SERS substrates |
| CN108580919B (en) * | 2018-03-08 | 2021-10-15 | 温州大学 | Preparation method of silver-core mesoporous gold nanostructure material, surface-enhanced Raman detection probe and application thereof |
| CN108580919A (en) * | 2018-03-08 | 2018-09-28 | 温州大学 | Preparation method, surface-enhanced Raman detection probe and its application of the mesoporous gold nano structural material of galactic nucleus |
| CN109696428A (en) * | 2019-01-14 | 2019-04-30 | 华南理工大学 | A kind of method of silver nano-grain aggregation enhancing Rhodamine B isothiocyanate fluorescence intensity |
| CN110539003A (en) * | 2019-08-09 | 2019-12-06 | 无锡英特派金属制品有限公司 | Production method of palladium powder for removing palladium mirror |
| CN110385446A (en) * | 2019-09-06 | 2019-10-29 | 青岛大学 | Continuous process preparation method of nano-silver particles |
| CN111257303A (en) * | 2020-04-22 | 2020-06-09 | 张维 | Detection method for detecting dioxin and polychlorinated biphenyl |
| CN111922358A (en) * | 2020-09-24 | 2020-11-13 | 东北大学 | Method for synthesizing nano silver with controllable morphology by reduction at normal temperature |
| CN114160785A (en) * | 2021-11-17 | 2022-03-11 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Preparation method of nano-silver solution with controllable mild conditions |
| CN114160785B (en) * | 2021-11-17 | 2024-01-26 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Preparation method of mild condition controllable nano silver solution |
| CN115252884A (en) * | 2022-07-11 | 2022-11-01 | 湖北工业大学 | Powder composition and application thereof in preparation of pet wound powder dressing |
| CN115252884B (en) * | 2022-07-11 | 2023-07-14 | 湖北工业大学 | Powder composition and application thereof in preparation of pet wound powder dressing |
| CN115364701A (en) * | 2022-08-22 | 2022-11-22 | 哈尔滨工业大学 | Preparation method of in-situ synthesized nano-silver PVDF (polyvinylidene fluoride) antibacterial ultrafiltration membrane |
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