微波固相合成氧化锌纳米棒

通过前驱体的微波固相热分解法快速合成了氧化锌纳米棒, 其直径在60～385 nm之间, 长可达数微米. 前驱体则通过一步室温固相反应制备. 用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能量色散X射线分析(EDX)和透射电子显微镜(TEM)对产物的结构和形貌进行了表征. 同时, 对氧化锌纳米棒的光致发光(PL)性能作了测试, 结果表明在355 nm处有一个明显的近带隙发射峰. 另外, 对比实验表明, 微波辐射在氧化锌纳米棒的形成过程中起了关键性作用, 并对其形成机理进行了初步探讨.

Microwave-assisted Solid-state Synthesis of ZnO Nanorods

ZnO nanorods were successfully synthesized by microwave-assisted solid-state reaction, and the nanorods are about 60～385 nm in diameter and several microns in length. The precursor was obtained by one-step room temperature solid-state reaction between Zn(CH₃COO)₂•2H₂O and Na₂CO₃ in the presence of PEG400. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM). The photoluminescence (PL) spectrum of the ZnO nanorods ex-hibits a strong near-band-edge emission at 355 nm. Compared with conventional heating, microwave radia-tion played an important role in formation of ZnO nanorods. In addition, formation mechanism of such ZnO nanorods was also discussed in brief.