Compound alkali metal hydrate dissolvent synthesis method for metallic sulfide nano crystal material

A metal sulfide and nanocrystal technology, applied in the direction of alkali metal sulfide/polysulfide, etc., to achieve the effect of less controllable parameters and low synthesis cost

Inactive Publication Date: 2009-06-10
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 sulfide nanocrystals by the method of complex alkali metal hydroxide media

Method used

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  • Compound alkali metal hydrate dissolvent synthesis method for metallic sulfide nano crystal material
  • Compound alkali metal hydrate dissolvent synthesis method for metallic sulfide nano crystal material
  • Compound alkali metal hydrate dissolvent synthesis method for metallic sulfide nano crystal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The specific synthetic method of cadmium sulfide (CdS) nanocrystal material

[0027] 1. KOH=57% and NaOH=43% are weighed and mixed as the reaction solvent according to weight percentage.

[0028] 2. According to cadmium chloride (CdCl 2 ) and the weight percent of sulfur powder are respectively 23% and 77% weighing as reactant. The weight percent of reactants to reactants+reaction solvent was 2.2%.

[0029] 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, then seal the polytetrafluoroethylene container and place it in a constant temperature muffle furnace with a temperature of 200°C. After the reaction vessel is kept warm in the furnace for 40 minutes, the reaction vessel is opened and stirred to uniformly mix the molten reaction solvent and the reactants. The reaction vessel was sealed again with a cover, and kept at a constant temperature of 200° C. for 24 hours.

...

Embodiment 2

[0034] Synthesis of Zinc Sulfide (ZnS) Nanocrystalline Structure

[0035] 1. Weigh and mix KOH=57% and NaOH=43% by weight as the reaction solvent.

[0036] 2. According to zinc acetate (Zn(CH 3 COO) 2· 2H 2 O) and sodium sulfide (Na 2 S.9H 2 O) weight percentages of 16% and 84% were weighed as reactants. The weight percentage of reactant to reactant+reaction solvent is 10%.

[0037] 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, then seal the polytetrafluoroethylene container and place it in a constant temperature muffle furnace with a temperature of 200°C. After the reaction vessel is kept warm in the furnace for 40 minutes, the reaction vessel is opened and stirred to uniformly mix the molten reaction solvent and the reactants. The reaction vessel was capped again and kept at a constant temperature of 200° C. for 41 hours.

[0038] 4. Take the reaction vessel out of...

Embodiment 3

[0042] Synthetic method of lead sulfide (PbS) nanocrystal material

[0043] 1. Weigh and mix KOH=57% and NaOH=43% by weight as the reaction solvent.

[0044] 2. According to lead nitrate (Pb(NO 3 ) 2 ) and sodium sulfide (Na 2 S.9H 2 O) weight percentages of 42% and 58% were weighed as reactants. The weight percent of reactants to reactants+reaction solvent was 1.3%.

[0045] 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, then seal the polytetrafluoroethylene container and place it in a constant temperature muffle furnace with a temperature of 165°C. After the reaction vessel is kept warm in the furnace for 40 minutes, the reaction vessel is opened and stirred to uniformly mix the molten reaction solvent and the reactants. The reaction vessel was sealed again with a cover, and kept at a constant temperature of 165° C. for 12 hours.

[0046] 4. Take the reaction vessel ...

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Abstract

The invention discloses a preparation method for a metal sulfide and a composite metal sulfide nano crystal material, which is suitable for the preparation of the nano crystal materials of cadmium sulfide, cuprous sulfide, zinc sulfide, lead sulfide, bismuth sulfide, and zinc-cadmium sulfide. The method is characterized in that water or organic solvent used in the existing hydrothermal or solvent thermal synthetic methods is replaced with melt composite alkali metal hydroxide which is synthesized through a chemical reaction under the normal atmosphere and a temperature between 100 and 300 DEG C. The raw materials used are soluble inorganic metal salts and sulfide or sulfide compounds, thereby having less controllable parameters and simple art, and being able to amplify manufacturing during the process of synthesis. Metal sulfide crystal produced has the advantages of good crystal, clean surface and even size, and is suitable for the research on the intrinsic properties and the maximum play of the functions of the nano crystal materials. The metal sulfide and the composite metal nano crystal materials have properties of a semiconductor, LED and optoelectronic, thereby being suitable for biomarker and preparation of a nano electronic apparatus, an LED apparatus and an optoelectronic apparatus.

Description

technical field [0001] The invention belongs to the field of preparation of metal sulfide nano crystal materials, in particular, relates to a preparation method of metal oxide nano crystal materials using composite alkali metal oxide as a solvent. Background technique [0002] Metal sulfide nanocrystal materials have semiconducting, luminescent and optoelectronic properties, and can be used in biomarkers, preparation of nanoelectronic devices, light emitting devices and optoelectronic devices. Among the existing methods for synthesizing sulfides, the method of composite solvothermal synthesis, for example, the Chinese patent publication number is 200510103028.9. The method for preparing sulfide nano-ions adopts the mixture of hydroxide, fatty acid and various organic polar solvents as a synthesis solvent, and uses metal Salt and sodium sulfide are synthetic raw materials. First, prepare the reaction precursor, such as mixing a certain amount of sodium hydroxide with a small ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/22
Inventor 胡陈果奚伊
Owner CHONGQING UNIV
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