PREPARATION METHOD FOR ULTRATHIN BORON NITRIDE NANOSHEET

摘要

A preparation method for an ultrathin boron nitride nanosheet, comprising the following steps: (a) precursor configuration: using melamine as a nitrogen source and boric acid as a boron source, the molar ratio of the nitrogen source to the boron source being 1:1-10:1; and completely dissolving melamine powder in deionized water under heating and stirring conditions, then adding boric acid powder and stirring until the reaction is complete, and obtaining a precursor solution; (b) centrifugal treatment: cooling the precursor solution to room temperature to obtain turbid liquid and carrying out centrifugal treatment, recovering obtained white precipitate, and drying to obtain precursor powder; (c) calcination treatment: pre-calcining the precursor powder under a reducing atmosphere, and then carrying out secondary calcining after heating; and naturally cooling to room temperature to obtain the ultrathin boron nitride nanosheet. The boron nitride obtained by the method is of a two-dimensional sheet structure, is rich in functional groups such as an amino group and a hydroxyl group on the surface, is thin in thickness and can be widely applied to the fields of biology, chemistry, photoelectric physics, and materials. The method has the advantages of easily available raw materials, low costs, simple process, short period, good repeatability, large-scale development, and easiness in popularization.