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Black phosphorus nanosheet, preparation method and application thereof

A nanosheet and black phosphorus technology, applied in the field of two-dimensional materials, can solve the problems of difficulty in meeting the requirements of semiconductor integrated devices, small size, etc., and achieve the effects of excellent optoelectronic performance and simple operation.

Pending Publication Date: 2021-01-29
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method does not use any organic solvent, therefore, the black phosphorus nanosheets prepared by it have no organic solvent residues and do not pollute the environment, but the size of the large black phosphorus nanosheets prepared by this method is small, which is nanoscale and difficult to obtain. Meet the needs of semiconductor integrated devices

Method used

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  • Black phosphorus nanosheet, preparation method and application thereof
  • Black phosphorus nanosheet, preparation method and application thereof
  • Black phosphorus nanosheet, preparation method and application thereof

Examples

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Embodiment 1

[0061] This embodiment provides a method for preparing black phosphorus nanosheets, which specifically includes the following steps:

[0062] (1) Measure 12 mg of tetrabutylammonium acetate (CH) with an electronic balance 3 COO TBA), add in the glass beaker that contains 20mL organic solvent DMF, vibrate 1min in the ultrasonic cleaner, obtain the electrolyte solution that concentration is 0.002M;

[0063] (2) Put 5 mg of bulk black phosphorus (purchased from Muke Nano Co., Ltd., purity>99.999%) on the tetrafluoroplatinum sheet electrode holder, connect it with the negative pole of the DC power supply, and use it as the electrochemical cathode, and the Pt foil as the electrochemical anode , keep the two electrodes parallel, and the distance between the electrodes is 2cm;

[0064] (3) All immerse the bulk black phosphorus and the Pt foil in the step (2) in the electrolytic solution in the step (1);

[0065] (4) Applying a DC voltage of 20V to the electrochemical system, after ...

Embodiment 2-4

[0068] The difference with Example 1 is that in step (1), tetrabutylammonium acetate (CH 3 COO·TBA) is replaced by TBA·Cl (embodiment 2), TBA·H 2 PO 4 (Example 3), TBA·HSO 4 (Example 4).

[0069] Figure 2b It is the photo of embodiment 3 gained black phosphorus dispersion liquid, and disperses evenly.

Embodiment 5-8

[0071] The difference with Example 1 is that in step (1), measure 1.2mg (Example 5), 120mg (Example 6), 0.6mg (Example 7), 180mg (Example 8) of tetrachloride with electronic balance Butylated ammonium acetate, the electrolyte solution that obtains concentration is 0.0002M (embodiment 5), 0.02M (embodiment 6), 0.0001M (embodiment 7), 0.03M (embodiment 8).

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Abstract

The invention relates to a black phosphorus nanosheet, a preparation method and application thereof. The preparation method comprises the following steps of: immersing an anode and a cathode in an electrolyte solution containing tetrabutyl cations, and applying direct-current voltage to obtain a black phosphorus nanosheet dispersion liquid; wherein the cathode comprises black phosphorus. Accordingto the method, an electrochemical cathodic disbonding method is adopted, the few-layer black phosphorus nanosheet with a transverse size of 10 microns or above can be obtained, and the black phosphorus nanosheet is used for preparing a semiconductor integrated photoelectric device, an optical film, a gas / biosensor or a solar cell or used for electronic printing.

Description

technical field [0001] The invention belongs to the field of two-dimensional materials, and in particular relates to a black phosphorus nanosheet and its preparation method and application. Background technique [0002] Black phosphorus (BP) crystal is a graphene-like two-dimensional layered material, that is, the atoms in the layer are bonded by strong covalent bonds, and the layers are bonded under the weak van der Waals action, with 0.3eV (bulk) The layer-number-dependent direct bandgap to 2.0eV (monolayer), strong in-plane anisotropy, excellent optoelectronic properties, and good biocompatibility have broad application prospects in the fields of electronics, optics, biology, and mechanics. [0003] The application of the material is based on its preparation technology. In the prior art, few-layer black phosphorus nanosheets are generally prepared by breaking the interlayer van der Waals force, and the most commonly used methods include mechanical exfoliation and liquid ...

Claims

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Application Information

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IPC IPC(8): C01B25/02B82Y30/00B82Y40/00
CPCC01B25/02B82Y30/00B82Y40/00
Inventor 冯晴亮刘宏燕王子康平王宁郑建邦
Owner NORTHWESTERN POLYTECHNICAL UNIV
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