A kind of method utilizing electrochemistry to prepare phosphorene

Abstract

The invention discloses a method for preparing phosphaalkene by utilizing electrochemistry. The method comprises the following steps: firstly, assembling an electrolytic cell by using an inert electrode as a positive electrode and phosphorus as a negative electrode, wherein in the electrolytic cell, the electrolyte solution is one or several of an aqueous electrolyte solution, an organic electrolyte solution and an ionic liquid electrolyte solution containing the electrolyte; applying direct current or alternating current voltage between the two electrodes of the electrolytic cell and stripping the phosphorus into phosphaalkene under a function of a direct current electric field or an alternating current electric field; and performing filtration treatment to obtain a stripped product, washing the stripped product for a plurality of times by using an organic solvent, centrifugally separating and drying to obtain the required phosphaalkene. According to the method, a phosphaalkene material with good quality, high yield and low cost can be conveniently, quickly and securely produced in an environment-friendly form, and can be applied to multiple fields of secondary ion batteries, supercapacitors, solar batteries, fuel batteries, electro-catalysis, electronic elements, bioanalysis, biological sensors and the like.

Description

technical field [0001] The invention relates to the technical fields of material preparation and energy, in particular to a method for preparing phosphorene by electrochemical methods. Background technique [0002] Phosphorus has a variety of allotropes, and black phosphorus is the most stable one among the allotropes of phosphorus. It is neither soluble in organic solvents nor flammable and chemically reactive. It has a graphite-like flake structure (corrugated layered structure), is conductive, and has a maximum carrier mobility of 65,000 (graphene is 100,000) cm 2 / V.s. Few-layer phosphorene field-effect transistors fabricated so far embody 10 5 About leakage current modulation rate (this value is 10,000 times that of graphene) and good current saturation effect, the carrier mobility can reach 1000cm 2 / V.s, these properties are far superior to the current two-dimensional nanomaterials such as transition metal sulfides, so they are expected to be well applied in nanoel...

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Problems solved by technology

[0003] In the prior art, the main method for obtaining phosphorene with black phosphorus as raw material is mechanical exfoliation, but the stripping efficiency of this method is extremely low and the cost is high, so it cannot be used as an effective method for large-scale preparation of phosphorene; another method is Liquid phase intercalation stripping method, but this method still has many disadvantages, such as long stripping time, low yield of phosphorene, separation and difficulty in control, etc., especially because of the use of high boiling point solvents, resulting in subsequent separation and purification of phosphorene Increased difficulty

The above two methods for preparing phosphorene are relatively cumbersome and complicated, have high requirements for equipment and materials, take too long, have harsh preparation conditions, are difficult to prepare, and have high costs.

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