Method for preparing silver/carbon nano composite body

A carbon nano-composite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as poor stability of nano-silver, and achieve the effects of stable silver nanoparticles, simple and easy method, and uniform distribution.

Inactive Publication Date: 2009-07-15
HEILONGJIANG UNIV
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of the poor stability of preparing

Method used

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  • Method for preparing silver/carbon nano composite body
  • Method for preparing silver/carbon nano composite body

Examples

Experimental program
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Example Embodiment

[0008] Specific embodiment 1: The silver / carbon nanocomposite of this embodiment is prepared according to the following steps: 1. Coordination of carbon source and silver ions: mix the carbon source with silver nitrate aqueous solution or silver ammonia solution, then add the metal catalyst solution and stir 12 ~24h, then ultrasonic treatment for 30~120min, add the surfactant solution to the mixture, continue to stir for 1~3h; Second, the complex solidification: The mixture prepared in step 1 is vacuum dried at 20~100℃ for 2~24h, Then cool to room temperature; 3. Heat treatment: heat up to 400-1100°C at a rate of 5-20°C / min, and then under the conditions of an air flow of 60-250ml / min and a temperature of 400-1100°C, the product of step 2 Heat treatment for 0.5~6h; 4. Activation treatment: heat up to 200~500℃ at a rate of 1~20℃ / min, and then reduce the temperature of step 3 under the conditions of air flow of 60~300ml / min and treatment temperature of 200~500℃ The product is activa...

Example Embodiment

[0011] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the carbon source in step 1 is a polymer with a polar group, an agricultural and forestry crop extract, or agroforestry waste; a polymer with a polar group therein One or more of polymethacrylic acid, polystyrene, polyfurfuryl alcohol, polyacrylamide, polyimine, polyurethane, polyglucosamine, polyethylene glycol, anion and cation exchange resin, polyvinyl alcohol, and polyaniline The extracts of agricultural and forestry crops are glucose, sucrose, fructose or starch, and the agricultural and forestry wastes are beet residue, bagasse, corn stalks, reeds, cattail or wormwood. Others are the same as the first embodiment.

[0012] When there are two or more polymers with polar groups in this embodiment, the components are mixed in any ratio.

Example Embodiment

[0013] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the metal catalyst solution in step one is ferric sulfate solution, ferrous sulfate solution, ferric chloride solution, ferrous chloride solution, ferric nitrate solution, Ferrous nitrate solution, potassium ferricyanide solution, potassium ferrocyanide solution, potassium trioxalate 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, magnesium sulfate solution, magnesium acetate solution or magnesium carbonate solution. Others are the same as the first or second embodiment.

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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 [0001] The invention relates to a preparation method of a noble metal / carbon nanocomposite. Background technique [0002] Nano-silver particles have very stable physical and chemical properties, and have excellent properties in many aspects such as electricity, optics, and catalysis. They have been widely used in many fields such as ceramic materials, environmental protection materials, and coatings, and have become a research hotspot. So far, many methods for preparing silver nanoparticles have been reported, including chemical reduction method, photoreduction method, electrochemical method, sol-gel method, laser ablation method and electroless plating method, etc., but the methods prepared by these methods Silver nanoparticles are easily oxidized and self-aggregated in air, which hinders the application of silver nanoparticles. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a silver / carbon nan...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B22F9/18B22F1/00
Inventor 付宏刚王宝丽田春贵王蕾田国辉
Owner HEILONGJIANG UNIV
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