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A composition-controllable copper-sulfur-selenium nanosheet and its preparation method and application

A selenium nano, copper sulfur technology, applied in the field of nano materials, can solve the problems of complex process and high temperature treatment in preparation method, and achieve the effects of simple process, excellent electrical and optical properties, and strong controllability

Inactive Publication Date: 2015-09-16
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a copper sulfur selenium CuS composed of divalent copper in order to avoid the disadvantages of the above-mentioned prior art. x Se 1-x (0≤x≤1) nanosheets and their preparation methods and applications, the technical problem to be solved is that the copper elements in the existing ternary alloy copper chalcogenides are all in a monovalent or mixed valence state, which limits its application, and the preparation method High temperature treatment is required and the process is complex

Method used

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  • A composition-controllable copper-sulfur-selenium nanosheet and its preparation method and application
  • A composition-controllable copper-sulfur-selenium nanosheet and its preparation method and application
  • A composition-controllable copper-sulfur-selenium nanosheet and its preparation method and application

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Experimental program
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Effect test

Embodiment 1～4

[0030] This embodiment prepares CuS according to the following steps x Se 1-x (0≤x≤1) nanosheets:

[0031] a, weigh or measure each raw material according to Table 1: wherein S powder is selected from (Shanghai Runjie Chemical Reagent Co., Ltd.), analytically pure (>99.9%); Se powder is selected from (Aladdin), purity (>99.9%) ).

[0032] Table 1

[0033] Example

S powder

Se powder

NaOH aqueous solution (5M)

Cu(NO 3 ) 2 (0.2M)

1

2.0mmol

0mmol

20ml

4ml

2

1.0mmol

1.0mmol

20ml

4ml

3

0.75mmol

1.25mmol

20ml

4ml

4

0mmol

2.0mmol

20ml

4ml

[0034] b. Add S powder and Se powder into NaOH aqueous solution, and stir at 90°C for 20 minutes to obtain a mixed solution; when stirring, cover the beaker where the solution is placed with a glass dish to prevent the solution from volatilizing;

[0035] c. Add Cu(NO 3 ) 2 , heated at 90°C for 50 minutes, the result...

Embodiment 5

[0048] This embodiment prepares CuS according to the following steps x Se 1-x Nanosheets:

[0049] a. Weigh 1.25mmol each of S powder and Se powder, add them into 22mL of 4M NaOH aqueous solution, and stir at 80°C for 30 minutes to obtain a mixed solution; when stirring, cover the beaker where the solution is placed with a glass dish to Prevent the solution from volatilizing;

[0050] b. Add 5 mL of CuCl with a concentration of 0.15M to the mixture 2 Aqueous solution, heated at 80°C for 360 minutes, the resulting black precipitate is the initial product;

[0051] c. The initial product was washed several times with deionized water, dilute hydrochloric acid and absolute ethanol in sequence, and then dried at 50°C for 18 hours to obtain the target product CuS 0.65 Se 0.35 Nanosheets.

[0052] Through characterization, it can be seen that the diameter of the obtained product is 150 nm, and its morphology is also a hexagonal crystal structure.

Embodiment 6

[0054] This embodiment prepares CuS according to the following steps x Se 1-x Nanosheets:

[0055] a. Weigh 0.75mmol each of S powder and Se powder, add them to 18mL of 6M NaOH aqueous solution, and stir at 100°C for 5 minutes to obtain a mixed solution; when stirring, cover the beaker where the solution is placed with a glass dish to Prevent the solution from volatilizing;

[0056] b. Add 3 mL of copper source solution (CuCl 2 or CuSO 4 After mixing according to the mass ratio of 1:1, add water), and obtain a black precipitate which is the initial product;

[0057] c. The initial product was washed several times with deionized water, dilute hydrochloric acid and absolute ethanol in sequence, and then dried at 70°C for 12 hours to obtain the target product CuS 0.58 Se 0.42 Nanosheets.

[0058] Through characterization, it can be seen that the diameter of the obtained product is 180 nm, and its morphology is a hexagonal crystal structure.

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Abstract

The invention discloses a component-controllable copper sulfur selenium nanometer sheet as well as a preparation method and application thereof. The component-controllable copper sulfur selenium nanometer sheet is characterized in that the chemical formula of the copper sulfur selenium nanometer sheet is CuSxSe1-x, and x is not less than 0 and is not greater than 1; a simple low temperature solution method is adopted, the matching ratio of S powder and Se powder in a reactant is changed, the value of x in CuSxSe1-x is controlled, and finally the component-controllable ternary copper sulfur selenium nanometer sheet is obtained. The method is simple in technology and suitable for large-scale production, can prepare the component-controllable hexagonal system alloy phase CuSxSe1-x nanometer sheet, and lays a foundation for the CuSxSe1-x nanometer sheet in near-infrared light radiation therapy, near-infrared photoelectric detection and a photovoltaic field. The CuSxSe1-x nanometer sheet as a counter electrode material of sensitized solar cells has prominent electrochemical catalytic activity for polysulfide electrolyte regeneration and realizes high photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to a copper sulfur selenium nanosheet CuS x Se 1-x The preparation method of (0≤x≤1) belongs to the technical field of nanometer materials. Background technique [0002] In recent years, nanostructured materials have become a research hotspot in the field of advanced materials and functional materials at home and abroad because of their excellent electrical and optical properties different from bulk materials and thin film materials. By changing the chemical composition of inorganic semiconductors, its physical and chemical properties can be effectively regulated, which has an important impact on the electrical, optical and optoelectronic properties of semiconductors. Ternary alloy materials can not only inherit the advantages of parent binary materials, but also have a series of novel characteristics, so they have important research significance. Copper chalcogenides have a series of excellent characteristics such as good envi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/00B82Y30/00H01G9/042
Inventor 许俊史正添谢超罗林保孙联领
Owner HEFEI UNIV OF TECH
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