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Method for preventing oxidative degradation of black phosphorus nanosheet and application of black phosphorus nanosheet

A technology of oxidative degradation and nanosheets, applied in chemical instruments and methods, phosphorus compounds, phosphorus, etc., can solve the problems of loss of catalytic performance, photocatalytic performance, and reduction of the number of surface catalytic active sites, so as to improve the stability of black phosphorus, Stable, efficient and controllable photocatalytic performance

Pending Publication Date: 2022-05-27
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the introduction of a protective layer on the surface of black phosphorus nanosheets, the number of catalytic active sites on its surface is inevitably greatly reduced, resulting in almost complete loss of its catalytic performance, especially its photocatalytic performance.

Method used

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  • Method for preventing oxidative degradation of black phosphorus nanosheet and application of black phosphorus nanosheet
  • Method for preventing oxidative degradation of black phosphorus nanosheet and application of black phosphorus nanosheet
  • Method for preventing oxidative degradation of black phosphorus nanosheet and application of black phosphorus nanosheet

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Embodiment 1

[0052] 1. Preparation of black phosphorus nanosheets

[0053] Black phosphorus nanosheets: Add 100 mg of black phosphorus powder to 1000 ml of N-methylpyrrolidone solvent, use a cell crusher to perform ultrasonic peeling for 6-10 hours, and centrifuge the obtained black phosphorus nanosheet suspension (6000 r / min) for 10 minutes, collect the supernatant, then centrifuge (10,000 r / min) for 20 minutes, collect the solid, and finally wash with ethanol 5 times to remove N-methylpyrrolidone After that, it was put into a vacuum oven at 40° C. for 12 hours to obtain black phosphorus nanosheets.

[0054] Hydrogenated black phosphorus nanosheets: 20 mg of black phosphorus nanosheet powder was transferred into a tube furnace under a mixed atmosphere of argon and hydrogen (argon flow rate: 50 mL / min, hydrogen flow rate: 5 mL / min) from room temperature The temperature was raised to 350°C at 5°C / min, and then kept for 4 hours; after the reaction was completed, it was naturally cooled to r...

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Abstract

The invention discloses a method for preventing oxidative degradation of black phosphorus nanosheets and application thereof, and the method comprises the following steps: carrying out hydrogenation reaction on the black phosphorus nanosheets in a mixed atmosphere of inert gas and hydrogen to obtain hydrogenated black phosphorus nanosheets of which the surfaces are modified with P-H covalent bonds. The surface of the hydrogenated black phosphorus nanosheet is modified with a P-H covalent bond with the molar ratio of 5-10%. In order to improve the stability of the black phosphorus nanosheet, the due catalytic performance is inevitably and greatly reduced by protection or modification measures in the prior art, and particularly, the photocatalytic performance is almost completely lost, however, the black phosphorus nanosheet is subjected to hydrogenation modification, so that the original photocatalytic performance of the black phosphorus nanosheet is basically maintained while the stability of the black phosphorus is improved.

Description

technical field [0001] The invention relates to the technical field of black phosphorus nanomaterials. More specifically, it relates to a method for preventing oxidative degradation of black phosphorus nanosheets and its application. Background technique [0002] After recent years of research, two-dimensional black phosphorus nanosheets have gradually become the next generation candidate materials with optoelectronic properties. Black phosphorus nanosheets have tunable semiconductor direct bandgap, highly and anisotropic carrier transport properties, and fast optical response properties, which make black phosphorus nanosheet materials suitable for various optoelectronic applications, such as field effect transistors, Lithium-ion batteries, solar cells, phototherapy and photocatalysis (see Black phosphorus field-effect transistors.Nat.Nanotechnol.2014,9,372-377, Ultrafast and directional diffusion of lithium in phosphorene for high-performance lithium-ionbattery.Nano.Lett.2...

Claims

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Application Information

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IPC IPC(8): C01B25/00C01B3/06B01J33/00B01J27/14
CPCC01B25/006C01B3/066C01B3/065B01J33/00B01J27/14Y02E60/36
Inventor 陈勇石睿
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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