表面活性剂辅助室温固相合成BaCO_3纳米棒

Surfactant-assisted synthesis of BaCO_3 nanorods by a room temperature solid-phase route

用表面活性剂聚乙二醇400为形貌控制剂,通过室温固相反应成功制备出BaCO3纳米棒。纳米棒的直径为80~160nm、长度为150nm^1.5μm。研究结果表明,在反应过程中,表面活性剂所形成的结构对最终纳米晶的形貌起着决定性的作用。用X射线粉末衍射和透射显微镜技术对所制备纳米晶的成分、形状和尺寸进行了表征分析。对Ba-CO3纳米棒的形成机理作了深入的讨论,提出了BaCO3纳米棒的表面活性剂软模板诱导自组装生长机理。

A room temperature solid-phase route was developed for the synthesis of BaCO3 nanorods with diameters of 80-160nm and lengths of 150nm to 1. Sum by using surfactant, polyethylene glycol 400, as shape controller. The results indicated that the surfactant played a key role for controlling the shape of BaCOa nanorods. XRD and TEM techniques were used to study on composition, phase, morphology and size of the as prepared BaCO3 nanocrystals. The growth mechanism of BaCO3 nanorods was discussed in detail. A surfactant soft template induced self-assemble growth mechanism was proposed for the formation of BaCO3 nanorods.