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A kind of grinding method prepares the method for copper sulfide nano sheet

A nano-sheet, copper sulfide technology, applied in copper sulfide and other directions, can solve problems such as unfavorable large-scale production and time-consuming, and achieve the effects of narrow energy gap, high purity and low cost

Active Publication Date: 2019-08-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former often requires high temperature, high pressure and high viscosity solvents, while the latter requires high concentration of sulfuric acid as an etchant, and both are time-consuming (several hours to 3 days), which is not conducive to large-scale production

Method used

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  • A kind of grinding method prepares the method for copper sulfide nano sheet
  • A kind of grinding method prepares the method for copper sulfide nano sheet
  • A kind of grinding method prepares the method for copper sulfide nano sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. Wash the agate mortar and pestle with deionized water and absolute ethanol and dry them. Weigh 0.34g CuCl 2 2H 2 O and 0.31g thiourea were placed in an agate mortar and ground with an agate pestle for 5min to obtain a light green mixture.

[0033] B. Weigh 0.20g of sodium hydroxide and place it in the mixture obtained in step A, continue grinding for 5min to obtain a black paste mixture. The paste was collected and washed several times by centrifugation with deionized water and absolute ethanol, and then dried at 60°C to obtain a dark green powder that was copper sulfide nanosheets. The obtained copper sulfide nanosheets were weighed, the result was 0.189g, according to CuCl 2 2H 2 The amount of O used calculated a theoretical yield of 0.191 g, thus a yield of 99.0%. Carry out nitrogen adsorption-desorption isotherm test to the copper sulfide nanosheet obtained, the results are shown in Figure 5 According to the BET method, the specific surface area is 23.18m ...

Embodiment 2

[0035] A. Wash the agate mortar and pestle with deionized water and absolute ethanol and dry them. Weigh 0.27g anhydrous CuCl 2 Put it in an agate mortar with 0.31g of thiourea, and grind it with an agate pestle for 5min to obtain a white mixture.

[0036] B. Weigh 0.20g of sodium hydroxide and place it in the mixture obtained in step B, and continue to grind for 5min to obtain a black paste mixture. The paste was collected and washed several times by centrifugation with deionized water and absolute ethanol, and then dried at 60°C to obtain a dark green powder that was copper sulfide nanosheets. The obtained copper sulfide nanosheets were weighed, the result was 0.188g, according to anhydrous CuCl 2 The calculated theoretical yield is 0.191 g, so the yield is 98.4%.

Embodiment 3

[0038] A. Wash the polytetrafluoroethylene ball mill jar and zirconia grinding balls with deionized water and absolute ethanol and dry them. Weigh 20.5g CuCl 2 2H 2 O and 31.3g of thiourea were placed in a ball mill jar, an appropriate amount of zirconia grinding balls were added, and put into a planetary ball mill to grind for 10 minutes to grind the reactants evenly.

[0039] B. Weigh 16.5g of sodium hydroxide and place it in the mixture obtained in step A. Because the reaction will emit a large amount of gas, first stir the mixture in the ball mill jar with a cleaned and dried glass rod for about 2 minutes until it no longer emits gas and It was black, and then the ball mill jar was sealed and put into a planetary ball mill to continue grinding for 20 minutes to obtain a black paste mixture. The paste was collected and washed several times by centrifugation with deionized water and absolute ethanol, and then dried at 60°C to obtain a dark green powder that was copper sulf...

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Abstract

The invention provides a method for preparing a copper sulfide nanosheet by a grinding method. The method comprises the steps that a copper salt and thiourea are ground firstly in a grinding device tobe converted into a complex intermediate-hydrated chloridized thiourea copper, further, sodium hydroxide is added thereto, the hydrated chloridized thiourea copper is converted into copper sulfide bythe action of sodium hydroxide and oxygen in the air, during a grinding process, a reaction system is paste-like, the diffusion of ions is greatly limited, so that the nucleation rate is slowed down,and a formed copper sulfide nucleus is grown into a nanosheet. The other reaction products are all easily soluble in water or ethanol, so the copper sulfide obtained after washing has a high purity.The copper sulfide nanosheet prepared by the method has a uniform sheet-like structure on the microscopic surface, and the nanosheet has a thickness of about 12 to 14 nm. The copper sulfide nanosheethas a large specific surface area and a narrow energy gap, and is expected to be applied to the fields of photocatalysis and photocells. The method is high in yield and is easy to realize large-scaleproduction.

Description

technical field [0001] The invention relates to the field of synthesis of nanomaterials, in particular to a method for preparing nanostructured copper sulfide. Background technique [0002] In recent years, many studies have found that transition metal-chalcogen compounds exhibit superior performance in the fields of photocatalysis, electrocatalysis, water treatment, and energy storage devices. Copper sulfide (CuS), as an important transition metal-chalcogen compound semiconductor material, exhibits a unique layered structure, metal-like conductivity and narrow band gap. Therefore, many researchers have carried out extensive research on the application of CuS in solar cells, photothermal conversion, photocatalysis, chemical sensors, and lithium-ion battery electrode materials and have made some progress. [0003] In order to meet different application requirements, zero-dimensional, one-dimensional, and two-dimensional copper sulfide nanostructures have been successfully sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/12
CPCC01G3/12C01P2004/20C01P2004/62C01P2004/64
Inventor 雷晓东秦洋孔祥贵李嘉力刘菲
Owner BEIJING UNIV OF CHEM TECH