Nanoscale black phosphorus as well as preparation method and application thereof

Abstract

The invention provides nanoscale black phosphorus as well as a preparation method and application thereof. The preparation method comprises the following steps that in protective gas, adding bulk red phosphorus of which the dimension is greater than 0.1cm and stainless steel balls of which the diameters are 6mm-12mm to a high energy ball milling pot in the mass ratio of the bulk red phosphorus to the stainless steel balls being 1 to (20-60), performing sealing, and then performing a ball milling reaction, so as to prepare the nanoscale black phosphorus. The temperature of the ball milling reaction is from room temperature to 60 DEG C, the ball milling rotational speed is 1100r / min-1500r / min, and the ball milling time is 2h-8h. The invention further provides the nanoscale black phosphorus prepared by the preparation method, the particle diameters of the nanoscale black phosphorus are 1nm-5nm. The invention further provides an application of the nanoscale black phosphorus in photoelectric devices, solar batteries, lithium batteries and biomedical science.

Description

technical field [0001] The invention belongs to the field of novel nanomaterials, and relates to a nanoscale black phosphorus and its preparation method and application, in particular to a method for efficiently and rapidly converting large-scale preparation of nanoscale black phosphorus. Background technique [0002] Black phosphorus, as the most stable of phosphorus allotropes, is a semiconductor with a natural wrinkled layered structure. This unique wrinkled structure endows black phosphorus with many unique physical and chemical properties, such as black phosphorus has a direct band gap, Possesses electron mobility beyond that of transition metals, up to 1,000cm 2 ·V -1 ·s -1 , and its spectral range covers the entire visible and near-infrared regions. Therefore, black phosphorus has broad application prospects in the fields of optoelectronic devices, sensors, biomedicine, solar cells, and lithium batteries. Especially nano-scale black phosphorus (usually <100nm), ...

AI Technical Summary

Problems solved by technology

The preparation of nano-scale black phosphorus is usually obtained by exfoliating bulk black phosphorus in the liquid phase, such as the method mentioned in the literature (Angew.Chem.Int.Ed.2015,54,1–6), the initial raw material is only 5 mg, and the yield and yield of nanoscale black phosphorus are very low

[0004] It can be seen that the production of black phosphorus in the prior art is low, requires high temperature and high pressure, requires high equipment, is difficult to operate, is not easy to repeat, and takes a long time to prepare, especially nano-scale black phosphorus. The preparation of black phosphorus is complex in process and low in yield, which is not conducive to large-scale production. Therefore, it is urgent to develop a method for the efficient and rapid conversion of large-scale preparation of nano-scale black phosphorus, so as to promote the application of black phosphorus in optoelectronic devices, solar cells, lithium batteries and biological Development and application in medicine, etc.

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