Preparation method of quasi one-dimensional boron nitride nanostructure

Abstract

The invention relates to a controllable preparation method of a quasi-one-dimensional boron nitride nanostructure. By adjusting the preparation parameters, various quasi-one-dimensional boron nitride nanotubes, stacked cup-shaped boron nitride nanowires and other quasi-one-dimensional can be prepared under control. Nano structure, large yield and high purity of the product. The specific method is: use nickelocene, ferrocene, cobaltocene or their mixture as the floating catalyst precursor, volatilize in the low temperature area and be carried by the carrier gas to the high temperature area to decompose into a metal catalyst, and promote the mixture of boron powder and boron oxide to form B2O2 vapor reacts with ammonia to form one-dimensional boron nitride nanostructures with different morphologies. Boron nitride nanowires and bamboo-shaped boron nitride nanotubes with different diameters and shapes can be obtained by controlling reaction parameters such as catalyst components, reaction time, catalyst evaporation temperature, and ammonia flow rate. The obtained boron nitride nanowires and nanotubes have essentially different structures, the former (0002) plane grows vertically to the axial direction, and the latter (0002) plane grows parallel to the axial direction.

Description

Technical field: [0001] The invention relates to a controllable preparation method of a boron nitride quasi-one-dimensional nanostructure, which is suitable for the controllable preparation of quasi-one-dimensional boron nitride nanotubes and nanowires with different shapes and structures, and the yield of the product is large and the purity is high. Background technique: [0002] Since the discovery of carbon nanotubes in 1991, the preparation and application of various systems of one-dimensional nanostructures have attracted widespread attention. The structure of hexagonal boron nitride is very close to that of graphite, which can be regarded as the replacement of carbon atoms in graphite by nitrogen atoms and boron atoms to form sp 2 Hybrid graphite-like lamellar structure. The electrical properties (bandgap width) of carbon nanotubes vary with diameter and chirality, which is difficult to control, thus increasing the difficulty of practical application. Compared with c...

AI Technical Summary

Problems solved by technology

Although boron nitride nanotubes were successfully prepared for the first time in 1995, and there have been many methods to prepare boron nitride nanotubes, such as arc method, laser sputtering method, chemical vapor deposition, solid-state reaction, etc., but so far , the yield of boron nitride tubes is very low and the purity is also poor

As another important boron nitride one-dimensional nanostructure, boron nitride nanowires, there are fewer reports on successful synthesis; only a few reports also have defects such as poor crystallinity, low purity and low yield.

In conclusion, the bottleneck of difficult sample preparation has significantly restricted the study of the intrinsic properties of boron nitride one-dimensional nanostructures and the realization of their potential applications.

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