Preparation method of shape-controlled silver sulfide

A silver sulfide and morphology technology, applied in chemical instruments and methods, silver compounds, silver compounds, etc., can solve problems such as the inability to adjust the optical and photoelectric properties of silver sulfide, the inability to effectively control the morphology and particle size of silver sulfide, etc. Achieve the effect of low cost, little pollution and simple process

Active Publication Date: 2017-05-31
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, these methods can only prepare silver sulfide with one morphology, but cannot effectively control the morphology and particle size of silver sulfide, so that the optical and photoelectric properties of silver sulfide cannot be effectively adjusted. big limitations

Method used

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  • Preparation method of shape-controlled silver sulfide
  • Preparation method of shape-controlled silver sulfide
  • Preparation method of shape-controlled silver sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of silver sulfide of the present invention, comprises the following steps:

[0039] (1) Prepare silver nitrate solution, polyvinylpyrrolidone solution and cystine solution respectively earlier, then these three kinds of solutions are mixed, control silver nitrate concentration in the mixed solution to be 0.003mol / L, the pH value of solution is 10, polyethylene The amount of pyrrolidone added is the same as that of silver nitrate, and the ratio of cystine to silver nitrate is 1:1;

[0040] (2) Transfer the mixed solution of step (1) to a 50mL autoclave with a polytetrafluoroethylene liner, and react at 180°C for 10 hours;

[0041] (3) After the reaction product after step (2) is naturally cooled to room temperature, it is centrifuged, washed with deionized water and ethanol for 3 times, and finally vacuum-dried for 8 hours to obtain a silver sulfide product.

[0042] Test the X-ray diffraction pattern of the silver sulfide product gained in the pres...

Embodiment 2

[0044] A preparation method of silver sulfide of the present invention, comprises the following steps:

[0045] (1) First prepare silver ammonia solution (formed by adding silver nitrate to ammonia water), polyethylene glycol solution and cysteine ​​solution respectively, and mix the three solutions, and control the concentration of silver ammonia in the mixed solution to be 0.005 mol / L, the pH value of the solution is 9, the polyethylene glycol addition is equal to the quality of the silver ammonia solution, and the ratio of the amount of cysteine ​​to the silver ammonia substance is 1.2:1;

[0046] (2) Transfer the mixed solution of step (1) to a 50mL autoclave with a polytetrafluoroethylene liner, and react at 160°C for 8 hours;

[0047] (3) The reaction product after step (2) was naturally cooled to room temperature, centrifuged, washed three times with deionized water and ethanol respectively, and finally vacuum-dried for 8 hours to obtain a silver sulfide product.

[00...

Embodiment 3

[0050] A preparation method of silver sulfide of the present invention, comprises the following steps:

[0051] (1) Silver nitrate solution, polyethylene glycol solution and methionine solution were first prepared respectively, then these three solutions were mixed, and the concentration of silver nitrate in the mixed solution was controlled to be 0.01mol / L, and the pH value of the solution was 11, polyethylene glycol The amount of alcohol added is 0.25 times the mass of silver nitrate, and the ratio of the amount of methionine to silver nitrate is 0.8:1;

[0052] (2) Transfer the mixed solution of step (1) to a 50mL autoclave with a polytetrafluoroethylene liner, and react at 120°C for 12 hours;

[0053] (3) After the reaction product after step (2) is naturally cooled to room temperature, it is centrifuged, washed with deionized water and ethanol for 3 times, and finally vacuum-dried for 8 hours to obtain a silver sulfide product.

[0054] Test the SEM picture of the silver...

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Abstract

The invention discloses a preparation method of shape-controlled silver sulfide. The preparation method comprises the following steps of (1) mixing sulfur-containing amino acid, a silver source and a dispersing agent to obtain a mixed solution; (2) controlling the concentration of silver ions in the mixed solution to range from 0.001 to 0.5mol / L, the adding quantity of the sulfur-containing amino acid to be 0.5 to 2 times the amount of substance of the silver ions in the silver source, the adding quantity of the dispersing agent to be 0.2 to 2 times the mass of the silver source, and a pH (Potential Of Hydrogen) value of the mixed solution to range from 9 to 11; (3) then reacting the mixed solution for 4 to 12 hours at the temperature of 120 to 200 DEG C, and finally centrifuging, washing and drying a product obtained through reaction so as to obtain the shape-controlled silver sulfide. According to the preparation method of the shape-controlled silver sulfide provided by the invention, the sulfur-containing amino acid is adopted as a sulfur source, so that the release speed of sulfur during a reaction process can be effectively controlled, and the shape and the particle size of the silver sulfide are regulated favorably; meanwhile, compared with other sulfur sources, the sulfur-containing amino acid has the advantage of less pollution, and is more green and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of preparation of silver sulfide, in particular to a preparation method of silver sulfide with controllable morphology. Background technique [0002] Silver sulfide is a narrow bandgap semiconductor material with high chemical stability. It has good photoelectricity, thermoelectricity, light absorption and photocatalysis properties. It has unique applications in the fields of photocatalysis, photovoltaic cells, photoconductive elements, and fluorescence imaging. [0003] The morphology of nanoparticles can greatly affect their performance. Nanoparticles with different shapes have different exposed crystal faces, so they have different catalytic activities; the different shapes and particle sizes of nanoparticles will lead to differences in surface defects, specific surface areas, etc., so that they have different catalytic activities. Fluorescent, catalytic, photoelectric and light absorption properties. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G5/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G5/00C01P2002/72C01P2004/03C01P2004/20C01P2004/30C01P2004/32C01P2004/38C01P2004/41C01P2004/62C01P2004/64
Inventor 田庆华邓多郭学益陆鼎楠
Owner CENT SOUTH UNIV
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