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

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...

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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.

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