Boride modified black phosphorus and preparation method thereof

Abstract

The invention relates to a boride modified black phosphorus and a preparation method thereof. The preparation method of the boride modified black phosphorus comprises the following steps: ultrasonically dispersing black phosphorus in an N-methylpyrrolidone and surfactant mixed solution under anhydrous and oxygen-free conditions, performing centrifuging dispersion to obtain a black phosphorus dispersion, adding a boride precursor to the dispersion, and performing a compounding and dehydration reaction to prepare the boride wrapped black phosphorus material. The preparation process is simple, raw materials adopted in the invention have low cost, the surface of the black phosphorus is densely and uniformly coated with the boride, so the dispersibility of the black phosphorus material is effectively improved, the black phosphorus is prevented from being reacted with oxygen and water, and the stability and the electrochemical performances of the black phosphorus are improved.

Description

technical field [0001] The invention relates to black phosphorus and a preparation method thereof, in particular to boride-modified black phosphorus and a preparation method thereof. Background technique [0002] Two-dimensional materials have been a research hotspot in recent years, and typical representatives include graphene and transition metal dichalcogenides with semiconducting properties. Since 2014, a new type of two-dimensional material, black phosphorus, has emerged, which has variable gap energy and good carrier mobility. Like graphene, black phosphorus can be exfoliated into single-atom-layer sheets, and this single-layer black phosphorus is also called black phosphorene. Black phosphorus has unique properties and excellent performance in mechanical, electronic, optical, thermal, acoustic and other aspects. As a direct band gap semiconductor material, black phosphorus can replace silicon in the semiconductor industry, and can be used in the preparation of thi...

AI Technical Summary

Problems solved by technology

[0004] Despite its excellent properties, black phosphorus, especially black phosphorene, has a fatal flaw: it is unstable in the air, and is easily oxidized slowly by oxygen when exposed to air, forming phosphorus oxides and phosphoric acid, resulting in a two-dimensional structure of black phosphorus disintegration, and thus affect its function

At present, the method of introducing metal ions on the surface of black phosphorus or introducing some chemical reaction modified black phosphorus has been reported, but the currently used method of introducing chemical groups on black phosphorus destroys the structure of black phosphorus and reduces its performance. However, the method of metal covering has higher cost of raw materials and poor density, which will cause the part of black phosphorus to be oxidized, thus affecting its performance.