水热合成MoO3纳米带的生长机理研究

以离子交换法制备的氧化钼溶胶为前驱体，在水热条件下制备了单晶MoO₃纳米带，对样品进行了XRD、SEM和TEM分析。通过考察水热反应温度和时间对产物结构和形貌的影响，结合材料热力学和动力学理论，探讨了MoO₃纳米带在水热条件下的生长机理。离子交换法制备的溶胶在水热条件下首先转变为热力学亚稳相h-MoO₃六角柱，随着温度的升高和时间的延长，h-MoO₃按照溶解-重结晶过程转变为稳定相α-MoO₃纳米带。

Growth Mechanism of MoO3 Nanobelts under Hydrothermal Condition

Molybdenum trioxide nanobelts were been synthesized by using stable MoO₃ sols as precursor under hydrothermal condition. The structure and morphology of the samples were characterized by XRD, SEM and TEM. The growth mechanism of the MoO₃ nanbelts was investigated by studying the influence of hydrothermal temperature and reaction time on the structure and morphology of the products. The MoO₃ sols obtained by ion exchange method were firstly tansformed into metastable h-MoO₃ microrods, and subsequently stable orthorhombic MoO₃ nanobelts were formed with the reaction temperature and time.