【摘要】 采用溶剂热的方法,通过改变反应体系中水的含量,合成制备了不同形态、粒度和复合方式的二氧化铈纳米粒子(ceria nano-particles)/碳纳米管(multi-walls carbon nanotubes-MCNTs)复合材料。反应溶液甲醇中存在少量水的条件下,二氧化铈纳米粒子为球形,具有单晶结构,平均粒度为100 nm左右,与碳纳米管形成超稳定的"串珠"结构的复合材料;反应溶液为甲醇时,二氧化铈纳米粒子粒度约为20 nm的不规则形状,粒子的长轴沿碳管径向分布。X射线衍射分析表明,二氧化铈纳米粒子晶体结构为面心立方。更多还原

【Abstract】 Ceria nano-particles/multi-wall carbon nanotubes(MCNTs) super-stable nanocomposites were prepared by solvent-thermal method.The sizes,morphology,and conformation of CeO2 nanoparticles with MCNTs were investigated by X-ray diffraction(XRD),scanning electron microscope(SEM) and high resolution transmission electron microscopy(HRTEM).The results indicated that the sizes,morphology,and conformation of CeO2 nanoparticles with MCNTs could be controlled via H2O quantity.The spherical ceria nanoparticles along MCNTs necklace-like supper-stable nanocomposites with size about 100 nm were synthesized at methanol solution with a little H2O,nevertheless,the ceria nanoparticles coating on MCNTs with size about 20 nm were founded at pure methanol.更多还原