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Method for preparing flower-shaped copper sulfide (CuS) nanocrystal

A copper sulfide and nanocrystal technology, applied in the field of semiconductor nanocrystals, can solve the problems of high energy consumption, long reaction time, environmental pollution, etc., and achieve the effects of low energy consumption, short reaction period and large surface area

Inactive Publication Date: 2012-07-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods usually require special instruments, or require strict experimental conditions, long reaction time, high energy consumption, and because there is a large amount of H in the process of synthesizing copper sulfide 2 S gas generation, if the reaction is carried out in an open system, it will inevitably cause some pollution to the environment

Method used

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  • Method for preparing flower-shaped copper sulfide (CuS) nanocrystal
  • Method for preparing flower-shaped copper sulfide (CuS) nanocrystal
  • Method for preparing flower-shaped copper sulfide (CuS) nanocrystal

Examples

Experimental program
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Embodiment 1

[0019] 1) Analytical pure copper nitrate trihydrate Cu(NO 3 ) 2 ·3H 2 O dissolved in deionized water to make Cu 2+ A transparent solution A with a concentration of 0.04mol / L;

[0020] 2) Add analytically pure thiourea (SC(NH 2 ) 2 ), so that Cu in the solution 2+ : SC(NH 2 ) 2 The molar ratio of is 1: 1.5, obtains solution B;

[0021] 3) Add analytically pure cetyltrimethylammonium bromide (CTAB) to solution B, so that the concentration of CTAB in the solution is 0.005mol / L to form precursor solution C;

[0022] 4) Pour the precursor solution C into a microwave hydrothermal reactor with a filling degree of 50%, then seal the reactor, put it into a microwave hydrothermal reactor with temperature and pressure dual control, and select the temperature control mode to react at 140°C 5min, naturally cool to room temperature after the reaction finishes;

[0023] 5) Turn on the hydrothermal reaction kettle, collect the product by centrifugation, wash it with deionized water ...

Embodiment 2

[0026] 1) Analytical pure copper sulfate pentahydrate (CuSO 4 ·5H 2 O) dissolved in deionized water to make Cu 2+ A transparent solution A with a concentration of 0.06mol / L;

[0027] 2) Add analytically pure thiourea (SC(NH 2 ) 2 ), so that Cu in the solution 2+ : SC(NH 2 ) 2 The molar ratio of is 1:2, obtains solution B;

[0028] 3) Add analytically pure cetyltrimethylammonium bromide (CTAB) to solution B, so that the concentration of CTAB in the solution is 0.002mol / L, forming precursor solution C;

[0029] 4) Pour the precursor solution C into a microwave hydrothermal reactor with a filling degree of 60%, then seal the reactor, put it into a microwave hydrothermal reactor with temperature and pressure dual control, and select the temperature control mode to react at 130°C 20min, naturally cool to room temperature after the reaction finishes;

[0030] 5) Turn on the hydrothermal reaction kettle, collect the product by centrifugation, wash it with deionized water and...

Embodiment 3

[0033] 1) Analytical pure copper nitrate trihydrate Cu(NO 3 ) 2 ·3H 2 O dissolved in deionized water to make Cu 2+ A transparent solution A with a concentration of 0.08mol / L;

[0034] 2) Add analytically pure thiourea (SC(NH 2 ) 2 ), so that Cu in the solution 2+ : SC(NH 2 ) 2 The molar ratio of is 1: 2.5, obtains solution B;

[0035]3) Add analytically pure cetyltrimethylammonium bromide (CTAB) to solution B, so that the concentration of CTAB in the solution is 0.008mol / L to form precursor solution C;

[0036] 4) Pour the precursor solution C into the microwave hydrothermal reaction kettle, the filling degree is 50%, then seal the reaction kettle, put it into the microwave hydrothermal reaction instrument with dual temperature and pressure control, select the pressure control mode to react at 0.5Mpa 30min, naturally cool to room temperature after the reaction finishes;

[0037] 5) Turn on the hydrothermal reaction kettle, collect the product by centrifugation, wash ...

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Abstract

The invention relates to a method for preparing a flower-shaped copper sulfide (CuS) nanocrystal, which comprises the following steps of: dissolving a dissoluble copper salt into deionized water to obtain a solution A; adding sulfourea into the solution A to obtain a solution B; adding hexadecyl trimethyl ammonium bromide into the solution B to form a precursor solution C; pouring the precursor solution C into a microwave hydrothermal reaction kettle, sealing the reaction kettle, putting the reaction kettle into a temperature and pressure dual-control microwave hydrothermal reactor, and carrying out natural cooling to room temperature after the reaction is finished; and opening the hydrothermal reaction kettle, carrying out centrifugal collection on a product, then, washing the production by respectively using deionized water and absolute alcohol, and drying to obtain the flower-shaped copper sulfide nanocrystal. According to the method for preparing the flower-shaped copper sulfide nanocrystal, flower-shaped copper sulfide nanocrystals with different grain sizes are prepared through changing the concentration of an added surfactant, i.e. the hexadecyl trimethyl ammonium bromide, the grain size controllable preparation of the flower-shaped copper sulfide nanocrystals is achieved, and then, copper sulfide semiconductor materials with different optical and electrical properties are prepared; and CuS grains prepared by the method are of a flower-shaped structure formed by assembling flake-shaped crystals with the thickness of 20-50 nm, so that the CuS grains have larger surface areas and can be applied to the catalytic field.

Description

technical field [0001] The invention belongs to the field of semiconductor nanocrystals, in particular to a method for preparing flower-shaped copper sulfide nanocrystals. Background technique [0002] Transition metal sulfides are of great interest to researchers because of their potential applications in semiconductors, light-emitting devices, and superconductivity. CuS is a very important p-type semiconductor with a band gap of 2.0eV. Due to its excellent conductivity, electrical and optical properties, it is widely used in thermocouples, optical filters, solar cells, sensors and catalysis. So far, various morphologies of copper sulfide have been successfully synthesized, such as nanodisk, hollow sphere, and tube. [0003] At present, the methods for preparing copper sulfide mainly include pyrolysis [Yu-Biao Chen, Ling Chen, and Li-Ming Wu. Water-Induced Thermolytic Formation of Homogeneous Core-Shell CuS Microspheres and Their Shape Retention on Desulfurization[J]. Cry...

Claims

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Application Information

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IPC IPC(8): C01G3/12B82Y40/00
Inventor 黄剑锋齐慧张培培曹丽云吴建鹏
Owner SHAANXI UNIV OF SCI & TECH
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