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Preparation method of copper sulphide nano-powder with different stoichiometric ratios

A stoichiometric ratio and nano-powder technology, applied in the field of nanomaterials, can solve the problems of difficult separation of products, expensive raw materials, complicated processes, etc., and achieve the effects of controllable stoichiometric ratio, easy availability of raw materials, and short process flow.

Inactive Publication Date: 2012-01-18
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In short, the existing methods for synthesizing copper sulfide nanopowders have the following disadvantages: raw materials are expensive, the process is cumbersome, time-consuming, the product is difficult to separate, and the yield is not high, and these preparation methods are only suitable for the preparation of a certain stoichiometric ratio. , for example, CuS or Cu 2 S nano-powders, it is difficult to have a method to simultaneously prepare a series of copper sulfide nano-powders belonging to different crystal types and different stoichiometric ratios

Method used

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  • Preparation method of copper sulphide nano-powder with different stoichiometric ratios
  • Preparation method of copper sulphide nano-powder with different stoichiometric ratios

Examples

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example 1

[0011] According to the molar ratio: elemental copper: elemental sulfur = 2.5:1 configuration, weigh the copper powder and sulfur powder of the corresponding mass, put them in a ball mill jar, put stainless steel balls with a ball-to-material ratio of 20:1, seal, and vacuumize. After being filled with argon protective gas, the copper sulfide (Cu 2.5 S) Nanopowder.

example 2

[0013] According to the molar ratio: elemental copper: elemental sulfur = 2.2:1 configuration, weigh the copper powder and sulfur powder of the corresponding mass, put them in a ball mill jar, put in a stainless steel ball with a ball-to-material ratio of 20:1, seal it, and vacuumize it. After being filled with argon protective gas, the copper sulfide (Cu 2.2 S) Nanopowder.

example 3

[0015] According to the molar ratio: elemental copper: elemental sulfur = 2:1 configuration, weigh the copper powder and sulfur powder of the corresponding mass, put them in a ball mill jar, put in a stainless steel ball with a ball-to-material ratio of 20:1, seal it, and vacuumize it. After being filled with argon protective gas, the copper sulfide (Cu 2 S) Nanopowder.

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Abstract

The invention discloses a preparation method of copper sulphide nano-powder with different stoichiometric ratios, and belongs to the technical field of nanometer materials. The preparation method is characterized in that elemental copper powder (having a mass fraction above 99.9%) and elemental sulfur power (with a mass fraction above 99.8%) are utilized as raw materials and mixed according to a general chemical formula of Cu2-xS, wherein x is great than or equal to -0.5 and less than or equal to 1.5; and the mixture is subjected to ball-milling at a ball-milling rate of 100 to 425rpm in an argon atmosphere for 5 to 600 minutes to obtain stoichiometric ratio-adjustable single-phase copper sulphide nano-powder with particle sizes of 1 to 500 nanometers. The preparation method has the advantages of cheap and easily available raw materials, simple equipment, good operability of equipment, short process flow, convenience and quickness of large-scale production of copper sulphide nano-powder with different stoichiometric ratios, and wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a method for preparing copper sulfide nanopowders with different stoichiometric ratios, and to mechanical alloying technology. Background technique [0002] Compared with traditional materials, nanomaterials have excellent magnetic, optical, electrical, acoustic and mechanical properties, and have attracted more and more attention. Transition metal sulfides are a class of functional materials with a wide range of applications. Nano-sized copper sulfide powder has a small particle size and a large specific surface area. Due to the quantum size effect, surface effect and macroscopic quantum tunneling effect, its semiconductor nanocrystals have the role of conducting electrons between molecular entities and microcrystals, and have a bulk Copper sulfide nanopowder is an important photoelectric material, which is used in solar cell materials, photothermal conversion cover...

Claims

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Application Information

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IPC IPC(8): C01G3/12B82Y40/00
Inventor 张波萍葛振华于昭新刘勇
Owner UNIV OF SCI & TECH BEIJING
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