Method for preparing manganese sulfide nanosheets employing quantum dot seed process

A technology of nanosheets and manganese sulfide, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve problems such as harsh reaction conditions, and achieve the effects of high repetition rate, easy access to raw materials, and simple operation process

Inactive Publication Date: 2013-12-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has harsh reaction conditions and certain requirements for equipment, and the particle size of the prepared material generally reaches the micron level.

Method used

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  • Method for preparing manganese sulfide nanosheets employing quantum dot seed process
  • Method for preparing manganese sulfide nanosheets employing quantum dot seed process
  • Method for preparing manganese sulfide nanosheets employing quantum dot seed process

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Under nitrogen protection at 200°C, 1.5 mmol of manganese chloride tetrahydrate was added to 5 ml of oleylamine to obtain a solution containing quantum dots. At the same time, 3 mmol of sublimed sulfur was dissolved in 5 ml of oleylamine at 70° C. under nitrogen protection. Heat 1ml of the mixed solution containing quantum dots to 240 degrees Celsius, and then add 0.5ml of sulfur source solution every 20 minutes, adding 5 times in total. After the reaction, an appropriate amount of ethanol was added, and the MnS nanosheets were obtained by centrifugal washing.

Embodiment 2

[0024] Under nitrogen protection at 240°C, 1.5 mmol of manganese chloride tetrahydrate was added to 5 ml of oleylamine to obtain a solution containing quantum dots. At the same time, 3 mmol of sublimed sulfur was dissolved in 5 ml of oleylamine at 70° C. under nitrogen protection. Heat 0.5 ml of the mixed solution containing quantum dots to 200 degrees Celsius, and then add 0.5 ml of the sulfur source solution every 20 minutes for a total of 5 additions. After the reaction, an appropriate amount of ethanol was added to break the emulsification, and the MnS nanosheets were obtained by centrifuging and washing.

Embodiment 3

[0026] Under nitrogen protection at 200°C, 1.5 mmol of manganese chloride tetrahydrate was added to 5 ml of oleylamine to obtain a solution containing quantum dots. At the same time, 3 mmol of sublimed sulfur was dissolved in 5 ml of oleylamine at 70° C. under nitrogen protection. Heat 2ml of the mixed solution containing quantum dots to 170 degrees Celsius, and then add 0.5ml of sulfur source solution every 20 minutes, and add 5 times in total. After the reaction, an appropriate amount of ethanol was added to break the emulsification, and the MnS nanosheets were obtained by centrifuging and washing.

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Abstract

The invention relates to a method for preparing manganese sulfide nanosheets employing a quantum dot seed process. The method comprises the following steps: (1) adding manganese chloride tetrahydrate to oleylamine to obtain a solution containing quantum dots; (2) dissolving sublimed sulfur into the oleylamine, so as to obtain a sulfur source solution; (3) heating the solution containing quantum dots to 170-240 DEG C, and then adding the sulfur source solution, adding ethanol as a precipitator after reaction is ended, centrifugally washing to obtain MnS nanosheets. The method disclosed by the invention is simple and convenient in operation process, available in required raw material for preparation, low in price, mild in reaction condition, and free of special demands on equipment. By adopting the method, common precursors can be taken as the raw materials; the MnS nanosheets with regular shapes can be prepared by a simple experimental device.

Description

technical field [0001] The invention belongs to the field of preparation of manganese sulfide materials, in particular to a method for preparing manganese sulfide nanosheets by a quantum dot seed method. Background technique [0002] Manganese sulfide (MnS) is a wide bandgap semiconductor material of Group VIIB-VIA, with a bandgap energy of 3.7eV. It has potential application value in the preparation of solar cell windows / buffers and short-wavelength optoelectronic devices. In recent years, the research on the preparation of MnS has aroused widespread attention. At present, the preparation method of MnS is mainly hydrothermal / solvothermal method. This method uses water or non-aqueous solvent as the reaction medium in a special closed reactor, and creates a high-temperature and high-pressure reaction environment by heating the reactor. Usually insoluble or insoluble substances are dissolved and recrystallized to perform inorganic synthesis and material processing methods. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00B82Y30/00
Inventor 胡俊青张誉心邹儒佳李博
Owner DONGHUA UNIV
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