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通过微波辅助法合成粒径均一的CeO2纳米颗粒、纳米立方体和纳米棒。结果表明,通过简单改变微波反应时间可以控制氧化铈形貌的变化。紫外可见光分光光谱测试表明不同形貌的纳米CeO2的紫外吸收能力是不同的,同时CeO2纳米材料的禁带宽度随着形貌由纳米粒子转变到纳米棒而减小。根据对不同微波反应时间的CeO2纳米晶的尺寸、形貌的观察,以及XRD图谱的计算,提出了一种符合实验结果的CeO2纳米材料的生长机制。
Synthesis of uniform particle size CeO2 nanoparticles, nanocubes and nanorods by microwave assisted method. The results show that the change of the morphology of cerium oxide can be controlled by simply changing the microwave reaction time. The results of UV-Vis spectroscopy show that the UV absorption capacity of nano-CeO2 with different morphologies is different, and the band gap of CeO2 nanomaterials decreases with the change of nano-particles to nanorods. Based on the observation of the size and morphology of CeO2 nanocrystals with different microwave reaction times and the calculation of XRD patterns, a new growth mechanism of CeO2 nanomaterials was proposed.