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Method for preparing monodisperse ternary sulfide CuInS2

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

Inactive Publication Date: 2007-10-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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
Comparison scheme
Effect test

Embodiment 1

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

[0019] ②Transfer the reaction solution prepared according to step ① into an autoclave with a 50ml polytetrafluoroethylene liner. After reacting at 200°C for 12 hours, the reaction kettle is naturally cooled to 60°C, and 10ml methanol is added. After centrifugation, use Wash several times with absolute ethanol and vacuum dry the sample to obtain the monodisperse ternary sulfide CuInS 2 Nanocrystalline.

[0020] The resulting monodisperse ternary sulfide CuInS 2 The X-ray diffraction pattern of the nanocrystal is shown in Figure 1a. It can be seen from the figure that the prepared material is tetragonal CuInS 2 . Figure 1b shows CuInS 2 The energy-scattering X-ray analysis spectrum of the nanoc...

Embodiment 2

[0022] ①In a 100ml flask, add 0.4mmol of copper acetate, 0.4mmol of indium chloride, and 3.6mmol of hexadecylamine to 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 Nanocrystalline reaction solution.

[0023] ②Transfer the reaction solution prepared according to step ① into an autoclave with a 50ml polytetrafluoroethylene liner. After solvent heating at 200°C for 24 hours, the reaction kettle is naturally cooled to 60°C, 10ml methanol is added, and after centrifugal separation, 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] Figure 3 is the obtained ternary sulfide CuInS 2 High-resolution transmission electron micrograph of nanocrystals. It can be seen from the figure that the ternary sulfide CuInS 2 Nanocrystals have clear lattice fringes, indicating that the synthe...

Embodiment 3

[0026] ①In a 100ml flask, add 0.8mmol of copper acetate, 0.8mmol of indium chloride, and 12mmol of oleylamine to 39ml of anisole, heat to 60℃ and keep for 1 hour, then add 0.5ml of carbon disulfide, add While continuing to magnetically stir, prepare CuInS 2 Nanocrystalline reaction solution.

[0027] ②Transfer the reaction solution prepared according to step ① into an autoclave with a 50ml polytetrafluoroethylene liner. After solvent heating at 200°C for 24 hours, the reaction kettle is naturally cooled to 60°C, 10ml methanol is added, and after centrifugal separation, Wash several times with absolute ethanol and vacuum dry the sample to obtain the monodisperse ternary sulfide CuInS 2 Nanocrystalline.

[0028] Figure 4 is the obtained monodisperse ternary sulfide CuInS 2Transmission electron micrograph of the nanocrystal. It can be seen from the figure that the morphology and size of the product of this embodiment are almost the same as those of Embodiment 1, and can self-assemble...

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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 using chemical solvothermal method to prepare monodisperse ternary sulfide CuInS 2 . It belongs to the technical field of nano material preparation. Background technique [0002] Due to the physical and chemical properties of size and morphology control and important applications in the fields of optics, electricity, catalysis, biosensors, data storage, etc., monodisperse inorganic nanocrystals have attracted more and more attention in the past ten years. . Especially for 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 performance research of colloidal monodisperse nanomaterials has been achieved Significant achievement. However, due to the lack of suitable synthetic methods, the study of monodisperse ternary sulfides has lagged far behind th...

Claims

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Application Information

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IPC IPC(8): C01G3/12C01G15/00B82B3/00
Inventor 杜卫民钱雪峰
Owner SHANGHAI JIAO TONG UNIV
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