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Method for quickly synthesizing tin selenide nano sheet by microwave assistance

A microwave-assisted, tin selenide technology, applied in nanotechnology, binary selenium/tellurium compounds, etc., can solve the problems of long synthesis time, expensive materials, complex synthesis process, etc., and achieve efficient use of energy, saving preparation time, size controllable effect

Active Publication Date: 2017-11-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reported traditional methods for preparing SnSe materials include hydrothermal method, solvothermal method, electrochemical deposition method, etc. SnSe with excellent performance has been successfully synthesized by these traditional methods, but most of the required materials are expensive and toxic, and the synthesis process is complicated , long synthesis time, extremely low yield, limited controllability of shape and size

Method used

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  • Method for quickly synthesizing tin selenide nano sheet by microwave assistance
  • Method for quickly synthesizing tin selenide nano sheet by microwave assistance
  • Method for quickly synthesizing tin selenide nano sheet by microwave assistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of SnSe includes the following steps:

[0031] Step 1, 0.902g stannous chloride dihydrate (SnCl 2 2H 2 (2), 0.16g selenium powder (Se), 8g potassium hydroxide (KOH) and 120ml ethylene glycol join in the beaker, 100 ℃ of oil bath heating and stirring 40min;

[0032] Step 2, add 4g potassium borohydride (KBH 4 ) Continue heating in an oil bath and stir until no bubbles are produced, then cool to room temperature;

[0033] Step 3. Transfer to a household microwave oven (Galanz, P70F23P-G5(SO)) and heat at medium-low heat for 8 minutes, rest for 2 minutes, and black precipitate appears after reheating for 7 minutes, and cool down to room temperature again;

[0034] Step 4, extracting the black product obtained by centrifuging at a speed of 4000r / min for 5min;

[0035] Step 5, alternately add ethylene glycol and ethanol to the black product and centrifuge at a speed of 10000r / min for 5min to remove impurities;

[0036] Step 6. Finally, place the cleaned ...

Embodiment 2

[0039] The preparation of SnSe includes the following steps:

[0040] Step 1, 0.45g stannous chloride dihydrate (SnCl 2 2H 2 (2), 0.16g selenium powder (Se), 4g potassium hydroxide (KOH) and 120ml ethylene glycol join in the beaker, 100 ℃ of oil bath heating and stirring 30min;

[0041] Step 2, add 2g potassium borohydride (KBH 4 ) Continue heating in an oil bath and stir until no bubbles are produced, then cool to room temperature;

[0042] Step 3. Transfer to a household microwave oven (Galanz, P70F23P-G5(SO)) and heat at medium-low heat for 8 minutes, rest for 2 minutes, and black precipitate appears after reheating for 15 minutes, and then cool to room temperature again;

[0043] Step 4, extracting the black product obtained by centrifuging at a speed of 4000r / min for 5min;

[0044] Step 5. Alternately add ethylene glycol and ethanol to the black product and centrifuge at a speed of 8000r / min for 5min to remove impurities;

[0045] Step 6. Finally, place the cleaned b...

Embodiment 3

[0048] The preparation of SnSe includes the following steps:

[0049] Step 1, 0.451g stannous chloride dihydrate (SnCl 2 2H 2 (2), 0.16g selenium powder (Se), 4g potassium hydroxide (KOH) and 120ml ethylene glycol join in the beaker, 100 ℃ of oil bath heating and stirring 30min;

[0050] Step 2, add 2g potassium borohydride (KBH 4 ) Continue heating in an oil bath and stir until no bubbles are produced, then cool to room temperature;

[0051] Step 3. Transfer to a household microwave oven (Galanz, P70F23P-G5(SO)) and heat at medium-low heat for 10 minutes, rest for 3 minutes, and reheat for 10 minutes. After 20 minutes of heating, a black precipitate appears, and cool to room temperature again;

[0052] Step 4, extracting the black product obtained by centrifuging at a speed of 4000r / min for 5min;

[0053] Step 5, alternately add ethylene glycol and ethanol to the black product and centrifuge at a speed of 10000r / min for 5min to remove impurities;

[0054]Step 6. Finally,...

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Abstract

The invention relates to a method for quickly synthesizing a tin selenide nano sheet by microwave assistance. The method comprises the following steps of (1), taking and mixing stannous chloride dihydrate, selenium powder, potassium hydroxide and ethylene glycol, and then heating in an oil bath; (2), continuously adding potassium borohydride, heating in the oil bath until no air bubbles, and cooling to room temperature; (3), next, transferring into a microwave oven, heating by a microwave, cooling, separating, washing and drying, so that a target product is subsequently obtained. Compared with the prior art, the method adopts the microwave for carrying out a reaction and heating to control the synthesis of the tin selenide nano sheet, is simple in process, quick in synthesis, higher in yield, and the like.

Description

technical field [0001] The invention relates to the field of preparation of inorganic compound semiconductor materials, in particular to a method for rapidly synthesizing tin selenide nanosheets assisted by microwaves. Background technique [0002] SnSe belongs to the narrow bandgap group IV-VI layered chalcogenides with an orthorhombic structure (space group: Pnma), its indirect band gap is 0.9eV, and its direct band gap is 1.3eV, so it presents a unique electronic structure and many excellent physical properties. In addition, SnSe is regarded as a stable, non-toxic, element-rich, and environmentally friendly simple binary compound, which has a wide range of applications in solar electrode materials, superionic materials, thermoelectric materials, infrared optoelectronic instruments and sensors. [0003] The reported traditional methods for preparing SnSe materials include hydrothermal method, solvothermal method, electrochemical deposition method, etc. SnSe with excellent...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y40/00
Inventor 蔡克峰倪丹陈元勋
Owner TONGJI UNIV
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