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Preparation method of spherical SnS nanometer crystals

A nanocrystal and nanocrystal technology, applied in the field of SnS nanopowder preparation, can solve problems such as no reports of SnS nanospheres, and achieve the effect of short reaction period and simple process equipment.

Active Publication Date: 2014-03-12
启东市芯成新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These unique nanostructures undoubtedly indicate that SnS is a material with rich structures and properties, but there has been no report on SnS nanospheres so far.

Method used

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  • Preparation method of spherical SnS nanometer crystals

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Experimental program
Comparison scheme
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Embodiment 1

[0019] 1) The analytically pure SnCl 2 2H 2 O was dissolved in concentrated hydrochloric acid, and deionized water was added to make Sn 2+ A transparent solution A with a concentration of 0.005mol / L;

[0020] 2) The analytically pure S 2- Concentration ≥ 8% (NH 4 ) 2 S solution was prepared by adding deionized water to S 2- Light yellow solution B with a concentration of 0.001mol / L;

[0021] 3) Take 25ml of solution A and add 0.1g of analytically pure polyethylene glycol (PEG) to it to make solution C;

[0022] 4) Add solution B dropwise to solution C under magnetic stirring, so that Sn 2+ : S 2- The molar ratio of is 1: 2 to form precursor solution D;

[0023] 5) Pour solution D into the hydrothermal reaction kettle, and the filling degree is controlled at 70%; seal the hydrothermal reaction kettle, and put it into a microwave hydrothermal reaction instrument with dual temperature and pressure control; select the temperature control mode for reaction, and the hydroth...

Embodiment 2

[0027] 1) The analytically pure SnCl 2 2H 2 O was dissolved in concentrated hydrochloric acid, and deionized water was added to make Sn 2+ A transparent solution A with a concentration of 0.01mol / L;

[0028] 2) The analytically pure S 2- Concentration ≥ 8% (NH 4 ) 2 S solution was prepared by adding deionized water to S 2- Light yellow solution B with a concentration of 0.05mol / L;

[0029] 3) Take 25ml of solution A and add 0.8g of analytically pure polyethylene glycol (PEG) to it to make solution C;

[0030] 4) Add solution B dropwise to solution C under magnetic stirring, so that Sn 2+ :S 2- The molar ratio of is 1:1 to form precursor solution D;

[0031] 5) Pour the solution D into the hydrothermal reaction kettle, and the filling degree is controlled at 60%; seal the hydrothermal reaction kettle, and put it into the microwave hydrothermal reaction instrument with dual temperature and pressure control; select the temperature control mode to react, and the hydrother...

Embodiment 3

[0034] 1) The analytically pure SnCl 2 2H 2 O was dissolved in concentrated hydrochloric acid, and deionized water was added to make Sn 2+ A transparent solution A with a concentration of 0.2mol / L;

[0035] 2) The analytically pure S 2- Concentration ≥ 8% (NH 4 ) 2 S solution was prepared by adding deionized water to S 2- Light yellow solution B with a concentration of 0.1mol / L;

[0036] 3) Take 25ml of solution A and add 1.5g of analytically pure polyethylene glycol (PEG) to it to make solution C;

[0037] 4) Add solution B dropwise to solution C under magnetic stirring, so that Sn 2+ :S 2- The molar ratio of is 1:5 to form precursor solution D;

[0038]5) Pour solution D into the hydrothermal reaction kettle, and the filling degree is controlled at 50%; seal the hydrothermal reaction kettle, and put it into a microwave hydrothermal reaction instrument with dual temperature and pressure control; select the temperature control mode for reaction, and the hydrothermal ...

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Abstract

The invention relates to a preparation method of spherical SnS nanometer crystals. The preparation method comprises the steps of: dissolving SnCl2.2H2O in concentrated hydrochloric acid, and adding de-ionized water to obtain a solution A; adding an (NH4)2S solution into the de-ionized water to prepare a solution B; adding polyethylene glycol into the solution A to prepare a solution C; dropwise adding the solution B into the solution C to form a precursor solution D; pouring the solution D into a hydro-thermal reaction kettle, placing the hydro-thermal reaction kettle into a temperature and pressure control microwave hydro-thermal reaction instrument for hydro-thermal reaction; opening the hydro-thermal reaction kettle, collecting the product by centrifuging, then washing by using the de-ionized water and absolute ethanol or isopropanol respectively, and then drying in a vacuum dry box to obtain the spherical SnS nanometer crystals as final products. According to the preparation method, the spherical SnS nanometer crystals with uniform particle sizes are quickly prepared by using a microwave hydro-thermal method; as the reaction is once finished in a liquid phase, the post treatment is not required; and simple process equipment and short reaction cycle are realized.

Description

technical field [0001] The invention relates to a method for preparing SnS nano powder, in particular to a method for preparing spherical SnS nano crystals by using microwave hydrothermal heat. Background technique [0002] Reducing manufacturing costs and improving photoelectric conversion efficiency have always been the two research topics most concerned by solar cell development researchers. In order to reduce costs, people use polysilicon, silicon grains, chalcogenides (such as CdS, CdTe, CIS...) to replace single crystal silicon. In order to improve the photoelectric conversion efficiency, on the one hand, people use new optoelectronic materials with better performance, such as GaAs, InP, etc., and on the other hand, some new battery structures are used. The most common method is to use chemical corrosion and other means to texture the surface of the battery. Porosity or porosity, using the light trapping effect to increase the light absorption of solar cells. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00B82Y40/00
Inventor 黄剑锋张培培齐慧曹丽云
Owner 启东市芯成新材料科技有限公司