Preparation of high concentration SnS2 nanosheet with liquid phase stripping method

A liquid phase exfoliation and nanosheet technology, applied in nanotechnology, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of many surface defects, small nanosheet area, poor crystallinity, etc., to avoid agglomeration, high exfoliation rate, High stability effect

Active Publication Date: 2019-07-19
南京倍格电子科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the mismatch between the surface energy of the two-dimensional material and the surface energy of the dispersion solvent, only a few of each material can be successfully prepared into a stable nanosheet dispersion. Tin disulfide has a layered structure and has a high storage capacity. lithium capacity and structural stability, and there are many existing methods for preparing tin disulfide, such as physical exfoliation, although high-quality SnS 2 Nanosheets, but the repeatability of this method is poor, and the prepared nanosheets are relatively small in size and quantity, which is not suitable for large-scale electronic device integration; the SnS2 nanosheets obtained by the hydrothermal synthesis method have inhomogeneous morphology and poor crystallinity. More surface defects will reduce carrier mobility

Method used

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  • Preparation of high concentration SnS2 nanosheet with liquid phase stripping method
  • Preparation of high concentration SnS2 nanosheet with liquid phase stripping method
  • Preparation of high concentration SnS2 nanosheet with liquid phase stripping method

Examples

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Effect test

Embodiment 1

[0048] A liquid phase exfoliation method for preparing high-concentration SnS2 nanosheets, specifically comprising the following steps: Step S1: adding 5 g of tin disulfide polycrystalline powder with a particle size of 5-100 μm and a purity greater than 99.95% into a closed blue cap ultrasonic bottle In the blue cap ultrasonic bottle, add the volume fraction of 20% ethanol and 80% water mixed solvent 300ml to form a solution system;

[0049] Step S2: performing ammonia gas bubbling treatment on the solution system in the blue cap ultrasonic bottle;

[0050] Step S3: Put the blue cap ultrasonic bottle into the ultrasonic cleaning machine for ultrasonic treatment. The conditions of ultrasonic treatment are: ultrasonic dispersion for 10 hours under the condition of 100W. The effect of obtaining orange yellow SnS2 nanosheet dispersion;

[0051] Step S4: Separating the orange yellow SnS2 nanosheet dispersion to obtain clean SnS2 nanosheets.

[0052] Wherein, the bubbling process...

Embodiment 2

[0067] The difference between this example and Example 1 lies in step S1: adding 5 g of tin disulfide polycrystalline powder with a particle size of 5-100 μm and a purity greater than 99.95% into a closed ultrasonic bottle with a blue cap, and then pouring Add 20% ethanol and 80% water mixed solvent 350ml into the ultrasonic bottle to form a solution system. All the other steps are the same as in Example 1.

Embodiment 3

[0069] The difference between this example and Example 1 lies in step S1: adding 5 g of tin disulfide polycrystalline powder with a particle size of 5-100 μm and a purity greater than 99.95% into a closed ultrasonic bottle with a blue cap, and then pouring Add 20% ethanol and 80% water mixed solvent 500ml into the ultrasonic bottle to form a solution system. All the other steps are the same as in Example 1.

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Abstract

The invention discloses preparation of a high concentration SnS2 nanosheet with a liquid phase stripping method and belongs to the technical field of biological nanomaterials. The preparation comprises the following steps: S1, adding a certain amount of tin disulfide polycrystalline powder or tin disulfide monocrystal blocks into a closed blue cover ultrasonic bottle, and then adding a certain amount of a polar solvent into the blue cover ultrasonic bottle to form a solution system; S2, carrying out inert gas bubbling treatment to the solution system in the blue cover ultrasonic bottle; S3, putting the blue cover ultrasonic bottle in an ultrasonic cleaner to be ultrasonically treated, and adding ice blocks into the ultrasonic cleaner during ultrasonic treatment to lead to a low temperatureenvironment to play a role of ice bath cooling so as to obtain a saffron yellow SnS2 nanosheet dispersion liquid; and S4, separating the saffron yellow SnS2 nanosheet dispersion liquid. The high concentration SnS2 nanosheet is prepared by employing an ultrasonic stripping method by means of dispersity of the solvent and a solute, and the nanosheet dispersion liquid which is high in stripping rateand high in stability and keeps the semiconductor property of the ice blocks is obtained.

Description

technical field [0001] The invention belongs to the technical field of bionano materials, in particular to a liquid phase exfoliation method for preparing high-concentration SnS2 nanosheets. Background technique [0002] Since the discovery of graphene materials in 2004, due to its novel optical properties and unique electrical characteristics, it has attracted widespread attention and research from scientists all over the world. However, graphene is a zero-band gap metallic material, which limits its use in electronic Applications in the field of devices. Therefore, it is urgent to find a two-dimensional material with a band gap structure. As a new representative of two-dimensional materials, the inorganic transition metal sulfide (TMDS) material not only has a graphene-like planar structure and molecular layer thickness, but also has a direct semiconductor band. gap, and its novel photoelectric, catalytic, and thermoelectric properties have great application potential in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00B82Y40/00H01L29/24
CPCB82Y40/00C01G19/00C01P2002/82C01P2002/84C01P2004/03C01P2004/22C01P2006/80H01L29/24
Inventor 蒋连福董文英
Owner 南京倍格电子科技有限公司
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