微波辅助合成一维氧化锌纳米棒及其表征

Microwave-assisted synthesis and characterization of single dimension ZnO nanorods

采用微波辅助快速高效制备出具有高比表面积的花状结构一维氧化锌纳米棒.初步探讨了醋酸锌与六亚甲基四胺（HMTA）投料比、氨水（或氢氧化钠）的用量和微波加热时间对最终产物的形貌及粒径分布的影响.合成样品通过X线衍射（XRD）、扫描电子显微镜（SEM）、场发射扫描电镜（FESEM）等方法对其结构、组成及形貌进行了表征,结果显示：氧化锌纳米棒为纯六方纤锌矿晶体结构,纳米棒直径为30～45 nm,长1～2μm.

ZnO nanorods assembled in flower shaped morphology have been successfully synthesized by a straightforward microwave technique in a very short duration using zinc acetate Zn（CH3COO）2 · 2H20 and HMTA as reactants. The effects of the ratio of Zn（CH3COO）2 · 2H20 and HMTA,terminal pH val- ues and time of microwave irradiation on the crystal phase, morphology and particle size distribution of the obtained ZnO nanopowers were investigated. The synthesized nanorods were characterized by X ray dif- fraction （XRD）, scanning electron microscopy（SEM） and field emission scanning electron microscopy （FESEM）. The results revealed that the ZnO nanorods had pure wurtzite structure, its diameter and length of the rods were within 30 45 nm （tip diameter 10 nm） and 1-2μm respectively.