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Method for preparing metallic simple substance nano-crystal material

A technology of nanocrystals and simple metals, applied in the field of preparation of a method, to achieve the effects of eliminating pollution, easy surface modification, and beneficial to environmental protection

Inactive Publication Date: 2009-10-28
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the preparation of simple metal nanocrystals by the method of composite alkali metal hydroxide media

Method used

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  • Method for preparing metallic simple substance nano-crystal material
  • Method for preparing metallic simple substance nano-crystal material
  • Method for preparing metallic simple substance nano-crystal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The specific synthetic method of copper nanocrystal material

[0026] The raw materials for the synthesis of copper nanocrystal materials are KOH, NaOH, copper chloride (CuCl 2 .2H 2 O), iron powder, the step-by-step reaction that takes place is as follows:

[0027] (a) CuCl 2 .2H 2 O→Cu + +2Cl - +2H 2 o

[0028] (b) Fe+2NaOH→FeO+H 2 +Na 2 o

[0029] (c)H 2 +Cu 2+ +2OH - →Cu+2H 2 o

[0030] The specific operation steps are as follows:

[0031] Step 1. KOH=57% and NaOH=43% are weighed and mixed according to the weight percentage as the reaction solvent.

[0032] Step 2, press copper chloride (CuCl 2 .2H 2 O) % by weight = 23%, % by weight of zinc powder = 77% weighed as a reactant. The weight percent of reactants to reactants+reaction solvent was 8.1%.

[0033] Step 3, put the reaction raw materials of the above step 2 and the reaction solvent in the above step 1 into a polytetrafluoroethylene reaction container, the weight percentage of the reactant ...

Embodiment 2

[0038] Synthesis of silver nanocrystal structures

[0039] The raw materials for synthesizing silver nanocrystal materials are KOH, NaOH, silver nitrate (AgNO 3 ), zinc powder, the step-by-step reaction that takes place is as follows:

[0040] (a) AgNO 3 → Ag + +NO 3 -

[0041] (b)Zn+2NaOH→ZnO+H 2 +Na 2 o

[0042] (c)H 2 +2Ag + +2OH - →2Ag+2H 2 o

[0043] The specific operation steps are as follows:

[0044] Step 1. KOH=57% and NaOH=43% are weighed and mixed according to the weight percentage as the reaction solvent.

[0045] Step 2, press silver nitrate (AgNO 3 ) weight percent=72.2%, zinc weight percent=27.8% were weighed as reactant.

[0046] Step 3, put the reaction raw materials in the above step 2 and the reaction solvent in the above step 1 into a polytetrafluoroethylene reaction container, the weight percentage of the reactant is 4.6%, then the polytetrafluoroethylene container is sealed and put into the temperature Inside a constant temperature muffle f...

Embodiment 3

[0051] Synthetic method of lead (Pb) nanocrystal material

[0052] The raw materials for the synthesis of lead nanocrystal materials are KOH, NaOH, lead nitrate (Pb(NO 3 ) 2 ), zinc powder, the step-by-step reaction that takes place is as follows:

[0053] (a)Pb(NO 3 ) 2 →Pb 2+ +2NO 3 -

[0054] (b)Zn+2NaOH→ZnO+H 2 +Na 2 o

[0055] (c)H 2 +Pb 2+ +2OH - →Pb+2H 2 o

[0056] The specific operation steps are as follows:

[0057] Step 1. KOH=57% and NaOH=43% are weighed and mixed according to the weight percentage as the reaction solvent.

[0058] Step 2, according to lead nitrate (Pb(NO 3 ) 2 ) weight percent=42%, zinc weight percent=58% weighed as reactant.

[0059] Step 3, put the reaction raw materials in the above step 2 and the reaction solvent in the above step 1 into a polytetrafluoroethylene reaction container, the weight percentage of the reactant is 4.1%, then the polytetrafluoroethylene container is covered and closed and put into the temperature Ins...

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Abstract

A method for preparing metal single substance nanocrystalline materials is applicable to the preparation of the metal nanocrystalline materials of copper, silver, lead, palladium, tin, antimony and so on. A melted composite alkali metal hydroxide solvent is used for carrying out the chemical reaction synthesis under the atmospheric pressure and the temperature of 100 to 300 DEG C, the used raw materials are soluble inorganic metal salts and zinc powder or iron powder, the cost during the synthesis process is low, various parameters in the reaction process are easy to be monitored and controlled, the environmental pollution is less, the evenness of a reaction system is good, the process is simple and the production is easy to be enlarged; furthermore, the obtained metal crystal has good crystallization, clean surface and even size, which is applicable to the research of intrinsic properties and the maximization of the functions of the nanocrystalline materials. The metal single substance nanocrystalline materials of the metal nanocrystalline materials are characterized by metal properties, electric and electronic properties, magnetic properties, chemical properties, thermal properties and luminous properties etc., which can be widely used in superconductive, chemical, medical, optical, electronic, electric appliance and other industries.

Description

technical field [0001] The invention relates to a preparation method of a nano crystal material, in particular to a method for preparing a simple metal nano material under low temperature and normal pressure conditions by using a composite alkali metal hydroxide solvent synthesis method. Background technique [0002] Metal elemental nanomaterials have metallic properties (such as high hardness, luster, opacity, easy heat transfer, good electrical conductor, etc.), electrical and electronic properties, magnetic properties, chemical properties, thermal properties, and luminescence, and are widely used in ultra- Guidance, chemical industry, medicine, optics, electronics, electrical appliances and other industries. Metallic silver can be used for biomarkers, sterilization, lubricants, catalysts, modification of plastics, rubber, coatings and paints, and plays an important role in the research fields of surface enhanced Raman spectroscopy, surface enhanced resonance scattering sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/18C30B29/02
Inventor 奚伊胡陈果王中林
Owner CHONGQING UNIV
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