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A kind of black phosphorus nanosheet and its preparation method and application

A technology of nano-sheets and black phosphorus, which is applied in the field of black phosphorus nano-sheets and its preparation, can solve the problem of high oxidation degree of black phosphorus, and achieve the effect of multiple layers, high oxidation degree, and complete peeling of black phosphorus

Active Publication Date: 2020-11-10
SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the existing problem of high oxidation degree of black phosphorus caused by the preparation of black phosphorus nanosheets in aqueous electrolyte, the present invention provides a method for preparing black phosphorus nanosheets and the obtained black phosphorus nanosheets, and the oxygen content of black phosphorus nanosheets Low, fewer layers, superior performance

Method used

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  • A kind of black phosphorus nanosheet and its preparation method and application
  • A kind of black phosphorus nanosheet and its preparation method and application
  • A kind of black phosphorus nanosheet and its preparation method and application

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preparation example Construction

[0052] The method for preparing black phosphorus nanosheets of the present invention uses black phosphorus sheets as electrolytic anodes to construct an electrochemical reaction system together with an inert electrode and an alkaline aqueous electrolyte. The inert electrode can be a platinum electrode or a gold electrode or a carbon rod, Wherein, the alkaline aqueous electrolyte comprises an N-N dimethylformamide solution in which epoxy resin is dissolved.

[0053] Wherein, the epoxy resin is E44 or E51, wherein the mass ratio of epoxy resin to N-N dimethylformamide is 0.1-2%, preferably 0.5-1%. The volume ratio of the N-N dimethylformamide solution dissolved with epoxy resin to the alkaline aqueous electrolyte C is 1:50-1:200, preferably 1:100-1:120. The inventor has proved through a large number of experiments that the addition of epoxy resin is preferably 0.1-2%, and there is almost no effect within this range, but more than 2% will affect the conductivity of the electrolyt...

Embodiment 1

[0061] The preparation method of the present embodiment black phosphorus nanosheets comprises the following steps:

[0062] Step S101, selection of electrodes

[0063] The black phosphorus single crystal is pressed into a black phosphorus sheet with a thickness of 3 mm, which is used as the anode during electrolysis; the platinum electrode is selected as the cathode of the electrolysis;

[0064] Step S102, preparing alkaline aqueous electrolyte

[0065] Select ammonium sulfate to be mixed with 1mol / L ammonium sulfate solution A and 1mol / L ammonium sulfate solution B; in ammonium sulfate solution B, add 2mL of 30% mass fraction of Ammonia water adjusted the pH value of the ammonium sulfate solution B to 9, stirred the mixed solution at a constant speed for 15 minutes, and ultrasonicated it for 5 minutes at 25°C and a power of 50W to obtain an alkaline aqueous electrolyte solution C;

[0066] Step S103, reaction stripping

[0067] In a constant temperature environment at 0°C;...

Embodiment 2

[0100] The preparation method of the present embodiment black phosphorus nanosheets comprises the following steps:

[0101] Step S101, selection of electrodes

[0102] The black phosphorus powder is pressed into a black phosphorus sheet with a thickness of 4 mm, which is used as the anode during electrolysis; the gold electrode is selected as the cathode of the electrolysis;

[0103] Step S102, preparing alkaline aqueous electrolyte

[0104] Select ammonium bisulfate to mix 0.6mol / L ammonium bisulfate solution A and 0.6mol / L ammonium bisulfate solution B; 3mL of 30% ammonia water was used to control the pH value of ammonium bisulfate solution B to 10, and the mixed solution was stirred at a uniform speed for 15 minutes, and ultrasonicated at 25°C and 40W for 5 minutes to obtain alkaline water electrolyte solution C ;

[0105] Step S103, reaction stripping

[0106] In a constant temperature environment at 2°C; black phosphorus flakes are used as the anode, gold electrodes a...

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Abstract

The invention discloses a black phosphorus nanosheet and its preparation method and application, belonging to the technical field of functional material production. In this method, a black phosphorus sheet is used as an electrolytic anode, and an electrochemical reaction system is jointly constructed with an inert electrode and an alkaline aqueous electrolyte, wherein the alkaline aqueous electrolyte contains N-N dimethylformamide dissolved in an epoxy resin solution. In the alkaline aqueous electrolyte, the structure of the prepared black phosphorus nanosheets tends to be more stable, not easy to break, and the degree of oxidation is reduced. The peeling is more complete.

Description

technical field [0001] The invention belongs to the technical field of functional material production, and more specifically relates to a black phosphorus nanosheet and a preparation method thereof. The black phosphorus nanosheet is suitable for two-dimensional semiconductor materials and biomedical carriers of high-performance electronic and optoelectronic devices. Background technique [0002] In recent years, black phosphorus nanosheets (also known as black phosphorus nanosheets) with a single-layer or few-layer black phosphorus atomic layer structure have high carrier mobility (200-1000cm2V-1s-1), adjustable The direct band gap, large switching ratio (104-105) and anisotropy have gradually become the most potential two-dimensional semiconductor materials suitable for high-performance electronic and optoelectronic devices. The atomic layers of black phosphorus are also stacked on each other through weak interlayer forces, and this force has the characteristics of van der ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/02
CPCC01B25/02B82Y30/00B82Y40/00C01P2004/20A61K9/5115
Inventor 陈杰骆艳华裴晓东王凡汤凤林朱叶峰申保金杨修光张玲
Owner SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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