CN101480604B - Method for preparing silver/carbon nano composite body - Google Patents
Method for preparing silver/carbon nano composite body Download PDFInfo
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- CN101480604B CN101480604B CN2009100712166A CN200910071216A CN101480604B CN 101480604 B CN101480604 B CN 101480604B CN 2009100712166 A CN2009100712166 A CN 2009100712166A CN 200910071216 A CN200910071216 A CN 200910071216A CN 101480604 B CN101480604 B CN 101480604B
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Abstract
A method for preparing a silver/carbon nanometer complex relates to a method for preparing a noble metal/carbon nanometer complex and solves the problem of poor stability of nano-silver prepared by adopting the prior art. The preparing method is as follows: coordinating carbon sources and silver ions; solidifying a complex; performing heat treatment and activation treatment; and obtaining the silver/carbon nanometer complex. The silver/carbon nanometer complex prepared by the method has good stability, high yield and even silver particle dispersion. The method is simple, easy to operate, low in energy consumption and cost and is suitable for industrialized production.
Description
Technical field
The present invention relates to a kind of preparation method of noble metal/silver/carbon nano composite body.
Background technology
Nano silver particles has very stable physical and chemical performance, has very excellent performance in electricity, optics and catalysis etc. aspect numerous, now has been widely used in many fields such as ceramic material, environment-friendly materials and coating, becomes the focus of people's research.Up to the present, a lot of methods that prepare nano silver particles are in the news, comprise chemical reduction method, photoreduction met hod, electrochemical process, sol-gel process, laser ablation method and electroless plating method etc., but the Nano silver grain with these method preparations is oxidized easily in air, and easily autohemagglutination makes the application of Nano silver grain be subjected to certain obstruction.
Summary of the invention
The objective of the invention is problem, and a kind of preparation method of silver/silver/carbon nano composite body is provided for the poor stability that solves the prior art for preparing Nano Silver.
Silver/silver/carbon nano composite body prepares according to the following steps: one, carbon source and silver ion coordination: carbon source is mixed with silver nitrate aqueous solution or silver ammino solution, add metal catalyst solution again, stir 12～24h, ultrasonic then processing 30～120min, in mixture, add surfactant solution, continue to stir 1～3h; Two, complex solidifies: the mixture vacuum drying 2～24h under 20～100 ℃ of conditions with the step 1 preparation is cooled to room temperature then; Three, heat treatment: being warming up to 400～1100 ℃ with 5～20 ℃/min speed, is that 60～250ml/min, temperature are under 400～1100 ℃ the condition, with the product heat treatment 0.5～6h of step 2 in throughput again; Four, activation processing: be warming up to 200～500 ℃ with 1～20 ℃/min speed, again throughput be 60～300ml/min, treatment temperature be under 200～500 ℃ the condition with the product activation processing of step 3 3～6 hours, promptly get silver-colored/silver/carbon nano composite body; Wherein the volume ratio of the quality of carbon source and silver nitrate or silver ammino solution is 5～15g: 100ml in the step 1, the solute in the metal catalyst solution and the weight ratio of carbon source are 0.025～0.05: 2.5, the weight ratio of the solute in carbon source and the surfactant solution is 10～50: 1, the molar concentration of liquor argenti nitratis ophthalmicus or silver ammino solution is 0.005～0.065mol/L, the molar concentration of metal catalyst solution is 0.025～0.3mol/L, and the molar concentration of surfactant solution is 0.0015mol/L; Carbon source described in the step 1 is polymer, farm-forestry crop extract or the agriculture and forestry organic waste material with polar group; The polymer that wherein has polar group is one or more the mixing in polymethylacrylic acid, polystyrene, poly furfuryl alcohol, polyacrylamide, poly-imines, polyurethane, poly glucosamine, polyethylene glycol, anion-cation exchange resin, polyvinyl alcohol, the polyaniline, the farm-forestry crop extract is glucose, sucrose, fructose or starch, and agriculture and forestry organic waste material is megasse, bagasse, cornstalk, reed, the stem or leaf of cattail or wormwood; Metal catalyst solution described in the step 1 is a ferrum sulfuricum oxydatum solutum, copperas solution, ferric chloride solution, solution of ferrous chloride, iron nitrate solution, ferrous nitrate solution, potassium ferricyanide solution, potassium ferrocyanide solution, three oxalic acid close potassium ferrite solution, cobalt sulfate solution, cobalt nitrate solution, cobalt acetate solution, cobalt chloride solution, nickel chloride solution, nickel nitrate solution, nickel acetate solution, nickel sulfate solution, magnesium chloride solution, magnesium nitrate solution, Adlerika, magnesium acetate solution or magnesium carbonate solution.
The good stability of the silver/silver/carbon nano composite body silver of the inventive method preparation, it is above and not oxidized to deposit a year and a half; The inventive method prepares silver/carbon (graphitic carbon) nano complex, carries out in the aqueous solution, and environmental protection, method is simple, productive rate height (actual production is about 95.7% with the theoretical yield ratio); Have bigger serface by carrying out silver/silver/carbon nano composite body that activation processing obtains, and have the better physical chemical property; The inventive method prepares silver/silver/carbon nano composite body, silver particles distribution homogeneous in the product; Silver/the silver/carbon nano composite body of the inventive method preparation has loose structure, and this helps its absorption to material; The Nano silver grain of the inventive method preparation is fixed on the carbon, because the passivation of carbon makes that synthetic Nano silver grain is highly stable.
Description of drawings
Fig. 1 is the X-ray diffraction spectrogram that the specific embodiment one makes product, and Fig. 2 makes the transmission electron micrograph of product for the specific embodiment 65.
The specific embodiment
Technical solution of the present invention is not limited to the following cited specific embodiment, also comprises any combination between each specific embodiment.
The specific embodiment one: present embodiment silver/silver/carbon nano composite body prepares according to the following steps: one, carbon source and silver ion coordination: carbon source is mixed with silver nitrate aqueous solution or silver ammino solution, add metal catalyst solution again, stir 12～24h, ultrasonic then processing 30～120min, in mixture, add surfactant solution, continue to stir 1～3h; Two, complex solidifies: the mixture vacuum drying 2～24h under 20～100 ℃ of conditions with the step 1 preparation is cooled to room temperature then; Three, heat treatment: being warming up to 400～1100 ℃ with 5～20 ℃/min speed, is that 60～250ml/min, temperature are under 400～1100 ℃ the condition, with the product heat treatment 0.5～6h of step 2 in throughput again; Four, activation processing: be warming up to 200～500 ℃ with 1～20 ℃/min speed, again throughput be 60～300ml/min, treatment temperature be under 200～500 ℃ the condition with the product activation processing of step 3 3～6 hours, promptly get silver-colored/silver/carbon nano composite body; Wherein the volume ratio of the quality of carbon source and silver nitrate or silver ammino solution is 5～15g: 100ml in the step 1, the solute in the metal catalyst solution and the weight ratio of carbon source are 0.025～0.05: 2.5, the weight ratio of the solute in carbon source and the surfactant solution is 10～50: 1, the molar concentration of liquor argenti nitratis ophthalmicus or silver ammino solution is 0.005～0.065mol/L, the molar concentration of metal catalyst solution is 0.025～0.3mol/L, and the molar concentration of surfactant solution is 0.0015mol/L.
The good stability of the silver/silver/carbon nano composite body silver of present embodiment preparation, it is above and not oxidized to deposit a year and a half.
The X-ray diffraction spectrogram of silver/silver/carbon nano composite body that present embodiment makes as shown in Figure 1, the silver ion in silver/silver/carbon nano composite body of making of present embodiment has been reduced into argent as can be seen from Figure 1, other exist mutually not have silver oxide etc.
The specific embodiment two: present embodiment and the specific embodiment one are different is that carbon source in the step 1 is polymer, farm-forestry crop extract or the agriculture and forestry organic waste material with polar group; The polymer that wherein has polar group is one or more the mixing in polymethylacrylic acid, polystyrene, poly furfuryl alcohol, polyacrylamide, poly-imines, polyurethane, poly glucosamine, polyethylene glycol, anion-cation exchange resin, polyvinyl alcohol, the polyaniline, the farm-forestry crop extract is glucose, sucrose, fructose or starch, and agriculture and forestry organic waste material is megasse, bagasse, cornstalk, reed, the stem or leaf of cattail or wormwood.Other is identical with the specific embodiment one.
The polymer that has polar group in the present embodiment is during for two or more, and each component press the arbitrary proportion mixing.
The specific embodiment three: present embodiment is different with the specific embodiment one or two is that metal catalyst solution in the step 1 is a ferrum sulfuricum oxydatum solutum, copperas solution, ferric chloride solution, solution of ferrous chloride, iron nitrate solution, ferrous nitrate solution, potassium ferricyanide solution, potassium ferrocyanide solution, three oxalic acid close potassium ferrite solution, cobalt sulfate solution, cobalt nitrate solution, cobalt acetate solution, cobalt chloride solution, nickel chloride solution, nickel nitrate solution, nickel acetate solution, nickel sulfate solution, magnesium chloride solution, magnesium nitrate solution, Adlerika, magnesium acetate solution or magnesium carbonate solution.Other is identical with the specific embodiment one or two.
The specific embodiment four: present embodiment and the specific embodiment three are different is that the solvent of the metal catalyst solution in the step 1 is water, alcohol or water-alcohol solution; Wherein the volume ratio of water and alcohol is 1: 5 in the water-alcohol solution, and alcohol is methyl alcohol, ethanol or isopropyl alcohol.Other is identical with the specific embodiment three.
The specific embodiment five: present embodiment and the specific embodiment one, two or four are different is that surfactant in the step 1 is polyoxyethylene-polyoxypropylene copolymer solution, poly-(oxygen ethene)
20-(oxypropylene)
70-(oxygen ethene)
20Solution, softex kw solution, PVP solution, neopelex solution, sodium dodecyl sulfate solution or APES solution.Other is identical with the specific embodiment one, two or four.
The specific embodiment six: present embodiment and the specific embodiment five are different is that the solvent of the surfactant solution in the step 1 is water, alcohol or water-alcohol solution; Wherein the volume ratio of water and alcohol is 1: 5 in the water-alcohol solution, and alcohol is methyl alcohol, ethanol or isopropyl alcohol.Other is identical with the specific embodiment five.
The specific embodiment seven: present embodiment and the specific embodiment one, two, four or six are different is that heat treated atmosphere in the step 3 is one or more the mixing in nitrogen, argon gas, carbon monoxide, carbon dioxide, hydrogen sulfide, the hydrogen.Other is identical with the specific embodiment one, two, four or six.
When heat treated atmosphere was two or more in the present embodiment, each component was pressed arbitrary proportion and is mixed.
The specific embodiment eight: present embodiment and the specific embodiment seven are different is that the atmosphere of the activation processing in the step 4 is one or more the mixing in steam, carbon dioxide, hydrogen, the carbon monoxide.Other is identical with the specific embodiment seven.
When the atmosphere of activation processing was two or more in the present embodiment, each component was pressed arbitrary proportion and is mixed.
The specific embodiment nine: present embodiment and the specific embodiment one, two, four, six or eight are different is that heat treatment temperature in the step 3 is 600～900 ℃.Other is identical with the specific embodiment one, two, four, six or eight.
The specific embodiment ten: present embodiment and the specific embodiment one, two, four, six or eight are different is that heat treatment temperature in the step 3 is 400 ℃.Other is identical with the specific embodiment one, two, four, six or eight.
The specific embodiment 11: present embodiment and the specific embodiment one, two, four, six or eight are different is that heat treatment temperature in the step 3 is 1100 ℃.Other is identical with the specific embodiment one, two, four, six or eight.
The specific embodiment 12: present embodiment and the specific embodiment one, two, four, six or eight are different is that heat treatment temperature in the step 3 is 800 ℃.Other is identical with the specific embodiment one, two, four, six or eight.
The specific embodiment 13: present embodiment and the specific embodiment nine are different is that activating treatment temperature in the step 4 is 300～400 ℃.Other is identical with the specific embodiment nine.
The specific embodiment 14: present embodiment and the specific embodiment nine are different is that activating treatment temperature in the step 4 is 200 ℃.Other is identical with the specific embodiment nine.
The specific embodiment 15: present embodiment and the specific embodiment nine are different is that activating treatment temperature in the step 4 is 500 ℃.Other is identical with the specific embodiment nine.
The specific embodiment 16: present embodiment and the specific embodiment nine are different is that activating treatment temperature in the step 4 is 350 ℃.Other is identical with the specific embodiment nine.
The specific embodiment 17: present embodiment and the specific embodiment one are different is that ultrasonic processing time in the step 1 is 50～100min.Other is identical with the specific embodiment one.
The specific embodiment 18: present embodiment and the specific embodiment one are different is that ultrasonic processing time in the step 1 is 30min.Other is identical with the specific embodiment one.
The specific embodiment 19: present embodiment and the specific embodiment one are different is that ultrasonic processing time in the step 1 is 120min.Other is identical with the specific embodiment one.
The specific embodiment 20: present embodiment and the specific embodiment one are different is that ultrasonic processing time in the step 1 is 80min.Other is identical with the specific embodiment one.
The specific embodiment 21: present embodiment and the specific embodiment one are different is that vacuum drying temperature in the step 2 is 40～80 ℃.Other is identical with the specific embodiment one.
The specific embodiment 22: present embodiment and the specific embodiment one are different is that vacuum drying temperature in the step 2 is 20 ℃.Other is identical with the specific embodiment one.
The specific embodiment 23: present embodiment and the specific embodiment one are different is that vacuum drying temperature in the step 2 is 100 ℃.Other is identical with the specific embodiment one.
The specific embodiment 24: present embodiment and the specific embodiment one are different is that vacuum drying temperature in the step 2 is 60 ℃.Other is identical with the specific embodiment one.
The specific embodiment 25: present embodiment and the specific embodiment one are different is that vacuum drying time in the step 2 is 4～20h.Other is identical with the specific embodiment one.
The specific embodiment 26: present embodiment and the specific embodiment one are different is that vacuum drying time in the step 2 is 2h.Other is identical with the specific embodiment one.
The specific embodiment 27: present embodiment and the specific embodiment one are different is that vacuum drying time in the step 2 is 24h.Other is identical with the specific embodiment one.
The specific embodiment 28: present embodiment and the specific embodiment one are different is that vacuum drying time in the step 2 is 12h.Other is identical with the specific embodiment one.
The specific embodiment 29: present embodiment and the specific embodiment one are different is that heating rate in the step 3 is 10～15 ℃/min.Other is identical with the specific embodiment one.
The specific embodiment 30: present embodiment and the specific embodiment one are different is that heating rate in the step 3 is 5 ℃/min.Other is identical with the specific embodiment one.
The specific embodiment 31: present embodiment and the specific embodiment one are different is that heating rate in the step 3 is 20 ℃/min.Other is identical with the specific embodiment one.
The specific embodiment 32: present embodiment and the specific embodiment one are different is that heating rate in the step 3 is 12 ℃/min.Other is identical with the specific embodiment one.
The specific embodiment 33: present embodiment and the specific embodiment one are different is that heat treatment time in the step 3 is 1～5h.Other is identical with the specific embodiment one.
The specific embodiment 34: present embodiment and the specific embodiment one are different is that heat treatment time in the step 3 is 0.5h.Other is identical with the specific embodiment one.
The specific embodiment 35: present embodiment and the specific embodiment one are different is that heat treatment time in the step 3 is 6h.Other is identical with the specific embodiment one.
The specific embodiment 36: present embodiment and the specific embodiment one are different is that heat treatment time in the step 3 is 3h.Other is identical with the specific embodiment one.
The specific embodiment 37: present embodiment and the specific embodiment one are different is that throughput in the step 3 is 100～200ml/min.Other is identical with the specific embodiment one.
The specific embodiment 38: present embodiment and the specific embodiment one are different is that throughput in the step 3 is 60ml/min.Other is identical with the specific embodiment one.
The specific embodiment 39: present embodiment and the specific embodiment one are different is that throughput in the step 3 is 250ml/min.Other is identical with the specific embodiment one.
The specific embodiment 40: present embodiment and the specific embodiment one are different is that throughput in the step 3 is 150ml/min.Other is identical with the specific embodiment one.
The specific embodiment 41: present embodiment and the specific embodiment one are different is that heating rate in the step 4 is 5～15 ℃/min.Other is identical with the specific embodiment one.
The specific embodiment 42: present embodiment and the specific embodiment one are different is that heating rate in the step 4 is 1 ℃/min.Other is identical with the specific embodiment one.
The specific embodiment 43: present embodiment and the specific embodiment one are different is that heating rate in the step 4 is 20 ℃/min.Other is identical with the specific embodiment one.
The specific embodiment 44: present embodiment and the specific embodiment one are different is that heating rate in the step 4 is 10 ℃/min.Other is identical with the specific embodiment one.
The specific embodiment 45: present embodiment and the specific embodiment one are different is that soak time in the step 4 is 4～5 hours.Other is identical with the specific embodiment one.
The specific embodiment 46: present embodiment and the specific embodiment one are different is that soak time in the step 4 is 3 hours.Other is identical with the specific embodiment one.
The specific embodiment 47: present embodiment and the specific embodiment one are different is that soak time in the step 4 is 6 hours.Other is identical with the specific embodiment one.
The specific embodiment 48: present embodiment and the specific embodiment one are different is that soak time in the step 4 is 4.5 hours.Other is identical with the specific embodiment one.
The specific embodiment 49: present embodiment and the specific embodiment one are different is that throughput in the step 4 is 100～200ml/min.Other is identical with the specific embodiment one.
The specific embodiment 50: present embodiment and the specific embodiment one are different is that throughput in the step 4 is 60ml/min.Other is identical with the specific embodiment one.
The specific embodiment 51: present embodiment and the specific embodiment one are different is that throughput in the step 4 is 300ml/min.Other is identical with the specific embodiment one.
The specific embodiment 52: present embodiment and the specific embodiment one are different is that throughput in the step 4 is 150ml/min.Other is identical with the specific embodiment one.
The specific embodiment 53: what present embodiment and the specific embodiment one were different is that the quality of carbon source in the step 1 and the volume ratio of silver ammino solution are 8～12g: 100ml.Other is identical with the specific embodiment one.
The specific embodiment 54: what present embodiment and the specific embodiment one were different is that the quality of carbon source in the step 1 and the volume ratio of silver ammino solution are 5g: 100ml.Other is identical with the specific embodiment one.
The specific embodiment 55: what present embodiment and the specific embodiment one were different is that the quality of carbon source in the step 1 and the volume ratio of silver ammino solution are 15g: 100ml.Other is identical with the specific embodiment one.
The specific embodiment 56: what present embodiment and the specific embodiment one were different is that the quality of carbon source in the step 1 and the volume ratio of silver ammino solution are 10g: 100ml.Other is identical with the specific embodiment one.
The specific embodiment 57: present embodiment and the specific embodiment one are different is that the weight fraction ratio of carbon source and metallic catalyst is 0.03～0.04: 2.5 in the step 1.Other is identical with the specific embodiment one.
The specific embodiment 58: present embodiment and the specific embodiment one are different is that the weight fraction ratio of carbon source and metallic catalyst is 0.025: 2.5 in the step 1.Other is identical with the specific embodiment one.
The specific embodiment 59: present embodiment and the specific embodiment one are different is that the weight fraction ratio of carbon source and metallic catalyst is 0.05: 2.5 in the step 1.Other is identical with the specific embodiment one.
The specific embodiment 60: present embodiment and the specific embodiment one are different is that the weight fraction ratio of carbon source and metallic catalyst is 0.04: 2.5 in the step 1.Other is identical with the specific embodiment one.
The specific embodiment 61: present embodiment and the specific embodiment one are different is that the molar concentration of silver ammino solution in the step 1 is 0.008～0.012.Other is identical with the specific embodiment one.
The specific embodiment 62: present embodiment and the specific embodiment one are different is that the molar concentration of silver ammino solution in the step 1 is 0.005mol/L.Other is identical with the specific embodiment one.
The specific embodiment 63: present embodiment and the specific embodiment one are different is that the molar concentration of silver ammino solution in the step 1 is 0.015mol/L.Other is identical with the specific embodiment one.
The specific embodiment 64: present embodiment and the specific embodiment one are different is that the molar concentration of silver ammino solution in the step 1 is 0.01mol/L.Other is identical with the specific embodiment one.
The specific embodiment 65: present embodiment silver/silver/carbon nano composite body prepares according to the following steps: one, carbon source and silver ion coordination: the Hexacyanoferrate potassium solution that silver ammino solution and the molar concentration of 10g polyurethane, 100ml 0.001mol/L is 0.025～0.3mol/L mixes, stir 12～24h, ultrasonic then 30～120min, adding molar concentration in mixture is polyoxyethylene-polyoxypropylene copolymer solution of 0.0015mol/L, continues to stir 1～3h; Two, carbon source is solidified: the mixed solution vacuum drying 2～24h under 20～100 ℃ of conditions with the step 1 preparation is cooled to room temperature then; Three, heat treatment: in nitrogen atmosphere, throughput is that 60ml/min, heating rate are that 5 ℃/min, temperature are under 1000 ℃ the condition, with the product heat treatment 5h of step 2; Four, activation processing: in throughput is that 60ml/min, heating rate are that 5 ℃/min, treatment temperature are under 350 ℃ the condition, with the product activation of step 33 hours, promptly gets silver-colored/silver/carbon nano composite body; Wherein the solvent of metal catalyst solution and surfactant solution is the mixed liquor of water and ethanol in the step 1, and wherein the volume ratio of water and ethanol is 1: 5 in the mixed liquor of water and alcohol; Solute in the Hexacyanoferrate potassium solution is 0.025～0.05: 2.5 with the weight fraction of carbon source ratio, and the weight fraction ratio of the solute in carbon source and the polyoxyethylene-polyoxypropylene copolymer solution is 10～50: 1.
The good stability of the silver/silver/carbon nano composite body silver of present embodiment preparation, it is above and not oxidized to deposit a year and a half.
The transmission electron micrograph of silver/silver/carbon nano composite body that present embodiment makes as shown in Figure 2, the Nano silver grain that makes of present embodiment is of a size of about 20 nanometers as can be seen from Figure 2, and is dispersed in the surface of carbon uniformly.
Claims (8)
1. the preparation method of silver/silver/carbon nano composite body, it is characterized in that silver/silver/carbon nano composite body prepares according to the following steps: one, carbon source and silver ion coordination: carbon source is mixed with silver nitrate aqueous solution or silver ammino solution, add metal catalyst solution again, stir 12～24h, ultrasonic then processing 30～120min, in mixture, add surfactant solution, continue to stir 1～3h; Two, complex solidifies: the mixture vacuum drying 2～24h under 20～100 ℃ of conditions with the step 1 preparation is cooled to room temperature then; Three, heat treatment: being warming up to 400～1100 ℃ with 5～20 ℃/min speed, is that 60～250ml/min, temperature are under 400～1100 ℃ the condition, with the product heat treatment 0.5～6h of step 2 in throughput again; Four, activation processing: be warming up to 200～500 ℃ with 1～20 ℃/min speed, again throughput be 60～300ml/min, treatment temperature be under 200～500 ℃ the condition with the product activation processing of step 3 3～6 hours, promptly get silver-colored/silver/carbon nano composite body; Wherein the volume ratio of the quality of carbon source and silver nitrate or silver ammino solution is 5～15g: 100ml in the step 1, the solute in the metal catalyst solution and the weight ratio of carbon source are 0.025～0.05: 2.5, the weight ratio of the solute in carbon source and the surfactant solution is 10～50: 1, the molar concentration of liquor argenti nitratis ophthalmicus or silver ammino solution is 0.005～0.065mol/L, the molar concentration of metal catalyst solution is 0.025～0.3mol/L, and the molar concentration of surfactant solution is 0.0015mol/L; Carbon source described in the step 1 is polymer, farm-forestry crop extract or the agriculture and forestry organic waste material with polar group; The polymer that wherein has polar group is one or more the mixing in polymethylacrylic acid, polystyrene, poly furfuryl alcohol, polyacrylamide, poly-imines, polyurethane, poly glucosamine, polyethylene glycol, anion-cation exchange resin, polyvinyl alcohol, the polyaniline, the farm-forestry crop extract is glucose, sucrose, fructose or starch, and agriculture and forestry organic waste material is megasse, bagasse, cornstalk, reed, the stem or leaf of cattail or wormwood; Metal catalyst solution described in the step 1 is a ferrum sulfuricum oxydatum solutum, copperas solution, ferric chloride solution, solution of ferrous chloride, iron nitrate solution, ferrous nitrate solution, potassium ferricyanide solution, potassium ferrocyanide solution, three oxalic acid close potassium ferrite solution, cobalt sulfate solution, cobalt nitrate solution, cobalt acetate solution, cobalt chloride solution, nickel chloride solution, nickel nitrate solution, nickel acetate solution, nickel sulfate solution, magnesium chloride solution, magnesium nitrate solution, Adlerika or magnesium acetate solution.
2. the preparation method of silver/silver/carbon nano composite body according to claim 1, the solvent that it is characterized in that the metal catalyst solution in the step 1 is water, alcohol or water-alcohol solution; Wherein the volume ratio of water and alcohol is 1: 5 in the water-alcohol solution, and alcohol is methyl alcohol, ethanol or isopropyl alcohol.
3. the preparation method of silver/silver/carbon nano composite body according to claim 1 and 2 is characterized in that the surfactant in the step 1 is polyoxyethylene-polyoxypropylene copolymer solution, poly-(oxygen ethene)
20-(oxypropylene)
70-(oxygen ethene)
20, softex kw solution, PVP solution, neopelex solution, sodium dodecyl sulfate solution or APES solution.
4. the preparation method of silver/silver/carbon nano composite body according to claim 3, the solvent that it is characterized in that the surfactant solution in the step 1 is water, alcohol or water-alcohol solution; Wherein the volume ratio of water and alcohol is 1: 5 in the water-alcohol solution, and alcohol is methyl alcohol, ethanol or isopropyl alcohol.
5. according to the preparation method of claim 1,2 or 4 described silver/silver/carbon nano composite bodies, it is characterized in that heat treated atmosphere in the step 3 is one or more the mixing in nitrogen, argon gas, carbon monoxide, carbon dioxide, hydrogen sulfide, the hydrogen.
6. the preparation method of silver/silver/carbon nano composite body according to claim 5, the atmosphere that it is characterized in that the activation processing in the step 4 are one or more the mixing in steam, carbon dioxide, hydrogen, the carbon monoxide.
7. according to the preparation method of claim 1,2,4 or 6 described silver/silver/carbon nano composite bodies, it is characterized in that the heat treatment temperature in the step 3 is 600～900 ℃.
8. the preparation method of silver/silver/carbon nano composite body according to claim 7 is characterized in that the activating treatment temperature in the step 4 is 300～400 ℃.
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