Compounding method for nanometer ultrathin boron carbon nitrogen sheet

Abstract

The invention discloses a compounding method for a nanometer ultrathin boron carbon nitrogen sheet and belongs to the technical field of material preparation. The method comprises the following steps: mixing diboron trioxide, melamine, glucose and the mixed salt of NaCl and KCL, then grinding, and performing heat treatment on the acquired powder under the atmosphere of ammonia gas, thereby acquiring the nanometer ultrathin boron carbon nitrogen sheet. According to the invention, the low-cost mixed salt and the boron carbon nitrogen precursor have a heating reaction under the atmosphere of ammonia gas, and the fused mixed salt is utilized as a template of the boron carbon nitrogen sheet, is evaporated at high temperature and is peeled, so that the nanometer ultrathin boron carbon nitrogen sheet characterized by having a graphite like phase crystal structure, the thickness of an atom-level ultrathin sheet, a huge size and a high specific area can be prepared. The compounding method disclosed by the invention is simple in operation; complex and expensive instruments and equipment are not required; the adopted raw materials are low in cost and are easily acquired; the environmental pollution is little; the method is suitable for large-scale production; and the compounding method has significance in boosting the application of the nanometer ultrathin boron carbon nitrogen sheet in the fields of photoelectric materials, organic catalysis, hydrogen storage carriers, detection analysis, and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for synthesizing ultrathin boron-carbon-nitrogen nanosheets. Background technique [0002] With the rise of graphene research, ultra-thin two-dimensional nanosheets have attracted more and more attention due to their unique physical and chemical properties and their applications in photoelectricity and catalysis. Boron nitride (BN) nanosheets have attracted the attention of many researchers because of their structural similarity to graphene, and have been widely used in the fields of optoelectronics, thermoelectricity, machinery, and pollutant adsorption. In recent years, the structural similarity between graphene and boron nitride has promoted the fusion of the two, and the synthesis of ternary boron carbon nitrogen nanosheets. The electronic structure of this boron carbon nitrogen nanosheet can be adjusted according to the content of each elem...

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Problems solved by technology

Chemical vapor deposition (Nat.Mater., 2010, 9, 430; Phys. Rev. Lett., 1995,75, 3918), high-energy electron beam irradiation (Proc.Natl. Acad. Sci. USA, 2005, 102 , 10451; Appl. Phys. Lett., 2008, 92, 133107) and boron carbon nitrogen nanotube expansion method (Nano Lett., 2010, 10, 5049) can be used for the synthesis of boron carbon nitrogen nanosheets, but these synthesis The process requires complex experimental equipment, harsh experimental conditions, expensive experimental raw materials, and low yield, which is not conducive to large-scale production, which limits the research and development of boron carbon nitrogen nanosheets

In addition, although the high-temperature solid-state reaction method (ACS Nano, 2010, 4, 1539; Chem. Eur. J., 2010, 16, 149) has also been developed to synthesize boron carbon nitrogen nanosheets, however, the nanosheets synthesized by this process Has many holes that compromise the integrity of the nanosheets

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