Preparation method for two-dimensional hexagonal tellurium nanosheets and application of preparation method to medical photoelectric detector

A hexagonal and tellurium nanotechnology, which is applied to the preparation of medical photodetectors, the field of preparation of two-dimensional hexagonal tellurium nanosheets, can solve the problem of small size of two-dimensional tellurium nanosheets, high process condition requirements, and preparation of two-dimensional tellurium nanosheets. The problem of complex process, etc., to achieve the effect of short reaction time, excellent performance and simple operation

Active Publication Date: 2020-11-24
SHENZHEN UNIV
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Problems solved by technology

[0005] In view of this, the present invention provides a preparation method of two-dimensional hexagonal tellurium nanosheets, and the present invention also provides the preparation method of the two-dimensional hexagonal tellurium nanosheets in the preparation of optoelectronic devices, thermoelectric devices and piezoelectric devices In order to solve the shortcomings of the existing two-dimensional tellurium nanosheet preparation method, including the relatively small size and large thickness of the prepared two-dimensional tellurium nanosheet, the preparation process is complicated, and the process conditions are relatively high, etc.

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  • Preparation method for two-dimensional hexagonal tellurium nanosheets and application of preparation method to medical photoelectric detector
  • Preparation method for two-dimensional hexagonal tellurium nanosheets and application of preparation method to medical photoelectric detector
  • Preparation method for two-dimensional hexagonal tellurium nanosheets and application of preparation method to medical photoelectric detector

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[0036] In a first aspect, the present invention provides a method for preparing two-dimensional hexagonal tellurium nanosheets, comprising the following steps:

[0037] Prepare a mixed system: provide a stabilizer and dissolve it in absolute ethanol, transfer the absolute ethanol containing the stabilizer to a container, stir the absolute ethanol solution containing the stabilizer and add sodium hydrogen telluride solution thereto, seal the container and Transfer the container to 30-60°C for 5-30 minutes to react to prepare a mixed system containing two-dimensional hexagonal tellurium nanosheets;

[0038] Purifying two-dimensional hexagonal tellurium nanosheets: centrifuging the mixed system containing two-dimensional hexagonal tellurium nanosheets to collect the precipitates of two-dimensional hexagonal tellurium nanosheets and drying them in vacuum to obtain two-dimensional hexagonal tellurium nanosheets;

[0039] The stabilizer is a surfactant.

[0040] Preferably, in the ...

Embodiment 1

[0052] A method for preparing two-dimensional hexagonal tellurium nanosheets, comprising the following steps:

[0053] Prepare mixed system: provide 310mg polyvinylpyrrolidone (average molecular weight is 58000) and be dissolved in dehydrated alcohol, the dehydrated alcohol containing polyvinylpyrrolidone is transferred in the flask, the dehydrated alcohol solution (or It is an absolute ethanol solution containing a stabilizer in a shaking flask), and 0.2 mL of sodium hydrogen telluride solution with a molar concentration of 0.67 mol / L is added thereto, the flask is sealed and transferred to 60° C. Hybrid system of two-dimensional hexagonal tellurium nanosheets.

[0054] Purification of two-dimensional hexagonal tellurium nanosheets: centrifuge the mixed system containing two-dimensional hexagonal tellurium nanosheets at 8000RPM for 5 minutes, collect the precipitate of two-dimensional hexagonal tellurium nanosheets after centrifugation, wash the precipitate with absolute etha...

Embodiment 2

[0056] A method for preparing two-dimensional hexagonal tellurium nanosheets, comprising the following steps:

[0057] Prepare mixed system: provide 1860mg polyvinylpyrrolidone (average molecular weight is 58000) and be dissolved in dehydrated alcohol, the dehydrated alcohol that will comprise polyvinylpyrrolidone is transferred in the flask, the dehydrated alcohol solution that comprises stabilizer in the stirring flask (or is an absolute ethanol solution containing a stabilizer in a shaking flask) and 0.5 mL of sodium hydrogen telluride solution with a molar concentration of 0.67 mol / L is added thereto, the flask is sealed and transferred to 30° C. Hybrid system of two-dimensional hexagonal tellurium nanosheets.

[0058] Purification of two-dimensional hexagonal tellurium nanosheets: centrifuge the mixed system containing two-dimensional hexagonal tellurium nanosheets at 5000RPM for 30 minutes, collect the precipitate of two-dimensional hexagonal tellurium nanosheets after c...

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Abstract

The invention provides a preparation method for two-dimensional hexagonal tellurium nanosheets. The preparation method comprises the following steps: preparing a mixed system: providing a stabilizer and dissolving the stabilizer in absolute alcohol, transferring the absolute alcohol containing the stabilizer into a container, stirring the absolute alcohol solution containing the stabilizer and adding a sodium hydrogen telluride solution into the absolute alcohol solution, and sealing the container and transferring the container to the condition of a 30-60 DEG C for reaction for 5-30 minutes toprepare the mixed system containing the two-dimensional hexagonal tellurium nanosheets; purifying the two-dimensional hexagonal tellurium nanosheets: centrifugally collecting the two-dimensional hexagonal tellurium nanosheets from the mixed system containing the two-dimensional hexagonal tellurium nanosheets for precipitation, and performing vacuum drying to prepare the two-dimensional hexagonaltellurium nanosheets. The preparation method for the two-dimensional hexagonal tellurium nanosheets of the invention has the advantages of simple operation, low cost, energy saving and environmental protection, short required reaction time, and the like. The invention further provides application of the preparation method for the two-dimensional hexagonal tellurium nanosheets.

Description

technical field [0001] The present invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing two-dimensional hexagonal tellurium nanosheets, and the invention also relates to the application of the preparation method for two-dimensional hexagonal tellurium nanosheets in the preparation of medical photodetectors . Background technique [0002] Tellurium, as a typical non-layered two-dimensional material, has attracted extensive attention of researchers recently. It has many excellent properties, such as fast photoconductivity, high pyroelectricity, large piezoelectricity and excellent nonlinear optical properties. These superior properties make tellurium useful in a wide range of applications, such as field-effect transistors, gas sensors, ultrafast photonics, photodetectors, and biomedicine. In addition, unlike other 2D materials such as black phosphorus and perovskite, the few-layer 2D tellurium materials show good stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/02A61B6/00
CPCC01B19/02A61B6/4208Y02P20/10
Inventor 陈嘉敏胡海国张家宜
Owner SHENZHEN UNIV
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