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Method for preparing monodisperse ternary sulfide CuInS2

A ternary sulfide, monodisperse technology, applied in chemical instruments and methods, copper sulfide, gallium/indium/thallium compounds, etc., can solve the cumbersome synthesis process of single-molecule precursors, highly toxic precursors, high production costs, etc. problem, to achieve the effect of low cost, cheap raw material and simple operation

Inactive Publication Date: 2009-06-03
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the metal-organic monomolecular precursor pyrolysis method can also obtain monodisperse CuInS 2 However, due to the cumbersome synthesis process of the single-molecule precursor used, the high production cost and the severe toxicity of the precursor itself, the further promotion of this method in the application fields such as photovoltaic solar cells is greatly limited.

Method used

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  • Method for preparing monodisperse ternary sulfide CuInS2
  • Method for preparing monodisperse ternary sulfide CuInS2
  • Method for preparing monodisperse ternary sulfide CuInS2

Examples

Experimental program
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Effect test

Embodiment 1

[0018] ①In a 100ml flask, add 0.4mmol of copper acetate, 0.4mmol of indium chloride, and 4mmol of octadecylamine into 39ml of anisole, heat to 60°C and keep it for 1 hour, then add 0.5ml of carbon disulfide, Continue magnetic stirring while adding to prepare CuInS 2 Reaction solution of nanocrystals.

[0019] ②Put the reaction solution prepared according to step ① into a high-pressure reactor with a 50ml polytetrafluoroethylene liner. After reacting at 200°C for 12 hours, the reactor is naturally cooled to 60°C, and 10ml of methanol is added. After centrifugation, use After washing several times with absolute ethanol and vacuum drying the sample, the monodisperse ternary sulfide CuInS can be obtained 2 Nanocrystalline.

[0020] The resulting monodisperse ternary sulfide CuInS 2 The X-ray diffraction pattern of nanocrystals is shown in figure 1 a. It can be seen from the figure that the prepared material is tetragonal CuInS 2 . figure 1 b is to get CuInS 2 The energy sc...

Embodiment 2

[0022] ①In a 100ml flask, add 0.4mmol of copper acetate, 0.4mmol of indium chloride, and 3.6mmol of hexadecylamine into 39ml of anisole, heat to 60°C and keep it for 1 hour, then add 1ml of carbon disulfide, Continue magnetic stirring while adding to prepare CuInS 2 Reaction solution of nanocrystals.

[0023] ②Put the reaction solution prepared according to step ① into a high-pressure reactor with a 50ml polytetrafluoroethylene liner. After solvent heating at 200°C for 24 hours, the reactor is naturally cooled to 60°C, and 10ml of methanol is added. After centrifugation, Wash several times with absolute ethanol, and vacuum-dry the sample to obtain the monodisperse ternary sulfide CuInS similar to Example 1. 2 Nanocrystalline.

[0024] image 3 is the resulting ternary sulfide CuInS 2 High-resolution TEM images of nanocrystals. It can be seen from the figure that the ternary sulfide CuInS 2 The nanocrystals have clear lattice fringes, illustrating that the as-synthesized ...

Embodiment 3

[0026] ①In a 100ml flask, add 0.8mmol of copper acetate, 0.8mmol of indium chloride, and 12mmol of oleylamine into 39ml of anisole, heat to 60°C and keep it for 1 hour, add 0.5ml of carbon disulfide, add While continuing the magnetic stirring, the preparation of CuInS 2 Reaction solution of nanocrystals.

[0027] ②Put the reaction solution prepared according to step ① into a high-pressure reactor with a 50ml polytetrafluoroethylene liner. After solvent heating at 200°C for 24 hours, the reactor is naturally cooled to 60°C, and 10ml of methanol is added. After centrifugation, Wash the sample several times with absolute ethanol and vacuum dry the sample to obtain the monodisperse ternary sulfide CuInS2 Nanocrystalline.

[0028] Figure 4 is the obtained monodisperse ternary sulfide CuInS 2 TEM image of nanocrystals. It can be seen from the figure that the morphology and size of the product of this example are almost the same as those of Example 1, and can self-assemble into ...

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Abstract

The invention relates to a method for preparing single-dispersive 3D sulfide CuInS2, which belongs to the field of nano-materials preparation. Chemical solution method is used to prepare the single-dispersive 3D sulfide CuInS2 nano-crystal by using alkylamine as the surfactant. First, cupric salt, indium salt, sulfer source and alkylamine are dispersed in the solvent to prepare the reaction solution, which is for solvent heat treatment to produce single-dispersive 3D sulfide CuInS2 nano-crystal with uniform shape. The invention is characterized in simple preparation, low cost and capable of synthersizing the single-dispersive 3D sulfide CuInS2 nano-crystal in large scale. And the prepared CuInS2 nano-crystal is of polyhedron shape, which is of 13-17nm in size and capable of self assembly in a wide range to produce single-layer nano-superlattice.

Description

technical field [0001] The invention relates to a monodisperse ternary sulfide CuInS 2 The preparation method of monodisperse ternary sulfide CuInS is prepared by chemical solvothermal method 2 . It belongs to the technical field of nanometer material preparation. Background technique [0002] Monodisperse inorganic nanocrystals have attracted increasing attention over the past decade due to their size- and shape-controlled physicochemical properties and important applications in optics, electronics, catalysis, biosensors, data storage, etc. . Especially semiconductor binary sulfides (such as CdS, CdSe, CdTe, PbS, ZnS, MnS, etc.), due to their quantum confinement effect and size-dependent optical properties, the preparation and properties of colloidal monodisperse nanomaterials have been obtained. a notable achievement. However, the study of monodisperse ternary sulfides has lagged far behind that of binary sulfides due to the lack of suitable synthetic methods. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/12C01G15/00B82B3/00
Inventor 杜卫民钱雪峰
Owner SHANGHAI JIAOTONG UNIV
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