Method for preparing boron carbon nitride nanosheets from graphene and boron nitride nanosheets (BNNSs)

Abstract

The invention provides a method for preparing boron carbon nitride nanosheets from graphene and BNNSs. The method comprises the following steps: (1) uniformly mixing graphene and BNNSs in proportion so as to form a mixture; (2) subjecting the mixture to a reaction at 800 to 1200 DEG C in a protective atmosphere or vacuum environment for 0.5 to 12 h; and (3) cooling a reaction product to room temperature, calcining the reaction product at 400 to 600 DEG C in the air for 4 to 8 h, and carrying out cleaning and drying after the calcined product is cooled to room temperature so as to obtain the boron carbon nitride nanosheets. The method prepares the boron carbon nitride nanosheets with graphene and BNNSs as raw materials; the raw materials are cheap and easily available; reaction conditions are easy and controllable; equipment needed in the method is simple; the content of elemental carbon in the obtained product is controllable; low-cost large-scale production can be easily realized; preparation procedures are simple; and the method can improve yield and reduce cost, is friendly to environment, eliminates pollution and toxicity to environment and is beneficial for environmental protection.

Description

technical field [0001] The invention relates to a method for preparing boron carbon nitrogen (BCN) nanosheets by using graphene and boron nitride nanosheets as raw materials, and belongs to the technical field of BCN nanometer material preparation. Background technique [0002] Various carbon (C) materials have received much attention in recent years. In addition to zero-dimensional fullerenes and one-dimensional carbon nanotubes, two-dimensional graphene is also the focus of research. Graphene not only realizes the application in many fields due to its own structure and performance advantages, but also triggers an upsurge in the study of other two-dimensional materials. As a two-dimensional layered material, hexagonal boron nitride (hour ~ BN) is also attracting more and more attention. Although Hour~BN and graphite have a similar structure and have the title of "white graphite", the physical and chemical properties of Hour~BN and graphite are very different. For example...

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Problems solved by technology

[0004] So far, none of the preparation methods can realize the large-scale preparation of BCN nanosheets, and both chemical vapor deposition and solid-phase synthesis require very high experimental temperatures (>1000 ° C), and the experimental process is difficult to control.

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