离子液体中不同形貌ZnO纳米材料的合成及表征

Synthesis and Characterization of ZnO Nanomaterials with Different Morphologies in Ionic Liquids

在不同的咪唑基离子液体中通过微波加热合成出了ZnO的片状聚集体、棒状聚集体和塔棒聚集体等纳/微米结构,考察了不同合成条件对ZnO形貌的影响,XRD表明产物为六方相纤锌矿ZnO结构,SEM和TEM表明产物形貌主要分为片的聚集体和棒的聚集体,电子衍射表明ZnO棒具有单晶结构,片的聚集体的PL谱表明在室温下这种形貌的ZnO具有很强的绿光发射和弱紫外光发射现象.

ZnO nano/microstructures of different morphologies have been synthesized by using Zn(OH)(4)(2-) and different ionic liquids with the aid of microwave irradiation. The as-prepared samples are characterized by X-ray diffraction (XRD), scanning electron microcopy (SEM), transmission electron microscopy (TEM), and photoluminescence(PL). The XRD pattern shows that the as-prepared samples have hexagonal structures, SEM and TEM images demonstrate that sheet and rod aggregates of ZnO are formed. SAED (selected area electron diffraction) images of rods indicate the single crystal na-ture, and the PL spectrum of ZnO nanosheet aggregates exhibits a weak ultraviolet emission and a strong green emission at room temperature.