【作者】 崔成梅； 雷鸽娟； 李娜； 耿艳敏； 谢钢； 陈三平；

【Author】 Chengmei Cui;Gejuan Lei;Na Li;Yanmin Geng;Gang Xie;Sanping Chen;College of Chemistry and Materials Science,Northwest University;

【机构】 西北大学化学与材料科学学院；

【摘要】 以葡萄糖和硝酸铋为原料,采用水热法合成石榴状Bi@C中空纳米复合材料,探讨了葡萄糖的量对复合材料中碳壳的厚度和壳内铋球数目的影响,并研究了其对黑索金(RDX)的燃烧催化性能。通过SEM、TEM、XRD、XPS、DSC等测试方法对样品进行表征。结果表明,合成的Bi@C纳米复合材料是一种碳壳内部镶嵌多个铋球的石榴状中空结构,该复合材料将RDX的热分解峰温提前47°C。此外,本文借助TEM分析了不同反应时间得到Bi@C纳米复合材料的结构,研究其形成机理。更多还原

【Abstract】 A green and facile one-pot template-free hydrothermal strategy has been developed to synthesize monodispersed pomegranate-like Bi@C multi-core-shell hollow nanostrutures via self-transformation based on nanoscale Kirkendall effect from solid nanocomposites.The samples were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS) and differential scanning calorimetry(DSC).Wherein,multiple monodispersed Bi nanospheres are studded onto the inner surface of the hollow carbon layer.The thickness of the carbon shell and the number of the encapsulated Bi cores in the hollow Bi@C can be controlled via tuning the amount of glucose.In addition,a series of time-dependent experiments were carried out to investigate the growth mechanism and morphology evolution of the Bi@C multi-core-shell structure using TEM.Due to its novel structure,Bi@C exhibits high combustion catalytic performance for the thermal decomposition of RDX.更多还原