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Method for preparing copper-doped cadmium sulfide nanosheets based on ion exchange reaction

An ion-exchange reaction and ion-exchanger technology, which is applied in cadmium sulfide, chemical instruments and methods, nanotechnology, etc., can solve the problems of affecting the stability of the performance of the matrix material, difficult to locate impurities, and unable to obtain cadmium sulfide.

Active Publication Date: 2021-06-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, stable hexagonal phase-doped cadmium sulfide cannot be obtained through traditional doping techniques, and it is easier to obtain cubic phase-doped cadmium sulfide or a mixture of the two. It is a gap-type doped cadmium sulfide, which does not greatly improve the optical properties of cadmium sulfide
In addition, due to the small volume of nano-semiconductor materials, if the above-mentioned conventional techniques are used for doping, problems such as difficult positioning of impurities and self-cleaning of the substrate will occur, which greatly affect the stability of the performance of the substrate material.

Method used

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  • Method for preparing copper-doped cadmium sulfide nanosheets based on ion exchange reaction
  • Method for preparing copper-doped cadmium sulfide nanosheets based on ion exchange reaction
  • Method for preparing copper-doped cadmium sulfide nanosheets based on ion exchange reaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of substituted copper-doped hexagonal cadmium sulfide nanosheets

[0050] Prepare divalent cadmium ion solution:

[0051] 0.031g Cd(NO 3 ) 2 4H 2 O was dissolved in 1 mL of methanol to form a 0.1 mol / L methanol solution of cadmium ions for use.

[0052] Preparation of Cu 2 S nanosheet organosol:

[0053] Take 1 mL of the CuS nanosheet toluene sol prepared above and put it into a single-necked flask, then add 10 mL of octadecene (organic solvent), 0.2 mL of n-dodecyl mercaptan (weak reducing agent), and react at 160 ° C for 30 min under the protection of nitrogen to obtain the obtained Cu reduced to an intermediate valence state 2 S nanosheet organosol.

[0054] Preparation of substituted copper-doped hexagonal cadmium sulfide nanosheets:

[0055] Add the above-mentioned cadmium ion methanol solution to the above-mentioned containing Cu 2 Add 0.2 mL of tributylphosphine (ion exchanger) to the single-necked flask of the S nanosheet organosol, react at...

Embodiment 2

[0059] Preparation of substituted copper-doped cadmium sulfide nanosheets

[0060] Prepare divalent cadmium ion solution:

[0061] 0.031g Cd(NO 3 ) 2 4H 2 O was dissolved in 1 mL of methanol to form a 0.1 mol / L ethanol solution of cadmium ions for later use.

[0062] Preparation of Cu 2 S nanosheet organosol:

[0063] Take 0.5 mL of the CuS nanosheet toluene sol prepared above and put it into a single-necked flask, then add 5 mL of octadecene (organic solvent), 0.1 mL of n-dodecanethiol (weak reducing agent), and react at 170 ° C for 40 min under nitrogen protection to obtain Cu that is reduced to an intermediate valence state 2 S nanosheet organosol.

[0064] Preparation of substituted copper-doped hexagonal cadmium sulfide nanosheets:

[0065] Add the above-mentioned cadmium ion methanol solution to the above-mentioned containing Cu 2 Add 0.1 mL of tributylphosphine (ion exchanger) to the single-necked flask of S nanosheet organosol, react at 160° C. for 10 min unde...

Embodiment 3

[0068] Preparation of substituted copper-doped cadmium sulfide nanosheets

[0069] Prepare divalent cadmium ion solution:

[0070] 0.031g Cd(NO 3 ) 2 4H 2 O was dissolved in 1 mL of methanol to form a 0.1 mol / L methanol solution of cadmium ions for use.

[0071] Preparation of Cu 2 S nanosheet organosol:

[0072] Take 0.2mL of the CuS nanosheet toluene sol prepared above and put it into a single-necked flask, then add 20mL of octadecene (organic solvent), 0.4mL of n-dodecanethiol (weak reducing agent), and react at 180°C for 50min under the protection of nitrogen to obtain Cu that is reduced to an intermediate valence state 2 S nanosheets;

[0073] Preparation of substituted copper-doped hexagonal cadmium sulfide nanosheets:

[0074] Add the above-mentioned cadmium ion methanol solution to the above-mentioned containing Cu 2 Add 0.4 mL of tributylphosphine (ion exchanger) to the single-necked flask of the S nanosheet organosol, react at 160° C. for 10 min under nitrog...

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Abstract

The invention provides a method for preparing copper-doped cadmium sulfide nanosheets based on an ion exchange reaction, comprising: preparing copper sulfide nanosheet organosol; preparing a cadmium source; under nitrogen protection, the copper sulfide The nanosheet organosol is mixed with the cadmium source, injected into an organic phosphine ligand ion exchanger, and reacted at 150° C. to 200° C. for 5 to 20 minutes to obtain copper-doped cadmium sulfide nanosheets. The method for preparing copper-doped cadmium sulfide nanosheets based on ion exchange reaction of the present invention can realize the thermodynamic metastable phase of copper-doped cadmium sulfide nanosheets on the one hand, and on the other hand, due to the creation of cation vacancies during the ion exchange process , so as to achieve substitutional doping, so that copper-doped cadmium sulfide has photoluminescent properties.

Description

technical field [0001] The invention relates to the field of synthesis of nanomaterials, in particular to a method for preparing copper-doped cadmium sulfide nanosheets based on ion exchange reactions. Background technique [0002] Cadmium sulfide nanosheets belong to two-dimensional nano-semiconductor materials and are a new type of inorganic functional materials. Its electrons can only move freely on the nanoscale of two dimensions in the plane, but are affected by the quantum size effect and quantum confinement effect in the vertical direction. It has unique physical and chemical properties and rich electronic and optical properties. The bandgap width of cadmium sulfide is about 2.45eV. By doping transition metal ions such as cuprous ions, silver ions and other impurities into cadmium sulfide crystals, its physical and chemical properties can be adjusted, and the regulation of these properties makes this type of material derive many Rich luminescent properties, thus expa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G11/02C09K11/56B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C01G11/003C01G11/02C01P2004/24C09K11/584
Inventor 徐萌贾姝漫张加涛白冰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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