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A kind of method of low temperature liquid phase synthesis stannous sulfide

A stannous sulfide, low-temperature liquid phase technology, used in chemical instruments and methods, tin compounds, inorganic chemistry, etc.

Active Publication Date: 2021-05-21
INST OF NEW MATERIALS & IND TECH WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common SnS preparation methods on the market are relatively difficult and complex, and may not be able to obtain the target product with good quality.

Method used

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  • A kind of method of low temperature liquid phase synthesis stannous sulfide
  • A kind of method of low temperature liquid phase synthesis stannous sulfide
  • A kind of method of low temperature liquid phase synthesis stannous sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: Experimental preparation of SnS nanocrystals

[0038] The main reagents used in the experimental preparation of SnS nanocrystals are shown in Table 1. The various experimental instruments required for the experiment are listed in Table 2.

[0039] Table 1 The main reagents used in the experiment

[0040]

[0041] Table 2 main experimental equipment

[0042] serial number equipment name Specifications 1 Electronic balance TLE104E 2 Reactor 50ml 3 vacuum oven DZF-6050 4 centrifuge C14D 5 CNC ultrasonic cleaner KQ-500DE

[0043] The preparation process is as figure 1 As shown, PVP is polyvinylpyrrolidone. The preparation process includes the following steps:

[0044] S1: Weigh a certain amount of PVP, add a small amount of deionized water, and stir to dissolve it. PVP with molecular weights of 5.8w and 130w were used, respectively.

[0045] S2: Weigh quantitative sulfur source, SnCl 2 (anhydr...

Embodiment 2

[0058] Example 2: Scanning electron microscope (SEM) analysis results of SnS

[0059] Figure 4 What is shown is the SEM picture of SnS prepared by the inventive scheme, and it can be seen that it is a very regular and regular crystal structure, indicating that the method can prepare the target product.

[0060] Discussed the preliminary products that different reaction conditions obtain in embodiment 1, the SEM image that these products are carried out scanning electron microscope to obtain is as follows Figure 5 shown. Figure A shows the product with a holding time of 6 hours. It can be seen from the picture that it contains many impurities, and the shape is different and relatively complicated. Although a little target product can be barely seen, the result is not ideal, so the holding time of 6 hours The reaction conditions were not suitable. Figures B and C are the products obtained by incubating at 80°C and 65°C for 24 hours respectively. The product obviously has a ...

Embodiment 3

[0061] Embodiment 3: X-ray energy spectrum (EDS) analysis of SnS

[0062] Figure 6 It is an EDS spectrum obtained by attaching the product prepared by the method of the present invention to the surface of single crystal silicon in Example 1, and then performing X-ray energy spectrum analysis. There is an S peak at the position of 2.3KeV, and there are two more obvious Sn peaks at 3.5KeV and 3.7KeV respectively. Looking at the individual peaks, it can be seen that the two peaks of Sn are slightly lower than the S peak, but higher than the background. It shows that this product is indeed composed of S and Sn elements. From the quantitative analysis results, it can be seen that the peak area ratio of S and Sn is 1:1. It can be concluded that the product made is SnS.

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Abstract

The invention provides a method for synthesizing stannous sulfide in a low-temperature liquid phase, which comprises the following steps: firstly, adding deionized water into polyvinylpyrrolidone, stirring and dissolving to obtain a polyvinylpyrrolidone solution. Next, weigh the sulfur source, anhydrous SnCl 2 , add dropwise hydrazine hydrate and ammonia water and stir. The sulfur source includes one of high-purity sulfur and thiourea. The polyvinylpyrrolidone solution was then added to the solution prepared in the previous step and placed in a reaction vessel to obtain a solid-liquid mixture, which was then put into a vacuum oven for reaction at a reaction temperature of 50° C. and a reaction time of 24 hours. Finally, the reaction vessel was taken out, the solid-liquid mixture was cooled and placed in a centrifuge tube, washed and centrifuged alternately with deionized water and absolute ethanol to obtain SnS crystal grains.

Description

technical field [0001] The invention relates to the field of material chemistry, in particular to a method for synthesizing stannous sulfide in a low-temperature liquid phase. Background technique [0002] The development of society is still inseparable from the use of energy, but it has also led to an increasing shortage of energy reserves. As a new type of environmentally friendly and sustainable energy, solar energy has attracted widespread attention from all walks of life. [0003] At present, most of the solar cells in the world are made of crystalline silicon materials. Silicon has a band gap of 1.1eV and is the second most abundant element in the earth's crust. It has high photoelectric conversion efficiency and non-polluting properties of materials. performance stability. [0004] Metal sulfides have the pyroelectric properties due to general materials, and have superior optical, catalytic, electrical and other properties. In particular, tin sulfide (SnS), because...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00
CPCC01G19/00
Inventor 尹德武金辉乐王舜刘爱丽张青程钱鹏程
Owner INST OF NEW MATERIALS & IND TECH WENZHOU UNIV
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