采用固相反应法,以无定型硼粉为原料,氯化亚铁为催化剂,在无水乙醇和氨气气氛中高温热处理3 h成功制得大量竹节状的三元硼碳氮(BCN)纳米管.利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)以及X射线光电子能谱仪(XPS)等手段对所得纳米管进行了表征.结果显示,纳米管的直径在60~90 nm之间,纳米管由B、C、N三种元素组成,其原子比为9.77∶1∶8.65.纳米管的生长机理属于气-液-固(VLS)机制.同时初步探讨了反应温度对纳米管的影响.
An effective solid-state reaction method is reported for synthesizing boron carbonitride nanotubes (BCNNTs) with bamboo-like structure in large scale by using amorphous boron powder and ferric chloride (FeCl2) catalyst in absolute ethyl alcohol and ammonia atmosphere at elevated temperatures.The products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS).The results reveal that large quantity of BCN nanotubes was synthesized and the diameter of the nanotubes ranged from 60 to 90 nm.The nanotubes are composed of elements of B, C and N, and the calculated atomic ratio of B, C and N is 9.77∶1∶8.65.The growth mechanism of BCNNTs is governed by vapor-liquid-solid (VLS) model.Moreover, the influence of reaction temperature on nanotubes was discussed.
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