ZnO纳米棒及其3D组装结构的微波水热合成与表征

Microwave Hydrothermal Preparation and Characterization of ZnO Nanorods and Its 3D Self-assembled Microstructures

以Zn（NO3）2·6H2O、NaOH和聚乙二醇（PEG，Mn=2000）为原料，采用微波水热法制备了结晶性能良好的ZnO纳米棒及其3D组装结构。利用EDS、XPS、SEM、TEM、FTIR对样品进行了表征，结合光致发光（PL）谱研究了样品的PL性能，并对ZnO纳米棒及其3D组装结构的生长机理进行了简要分析。结果表明，ZnO纳米棒的直径约为300nm，长径比约为3，3D组装结构的直径约为2μm，ZnO纳米棒及其3D组装结构的生长可能与PEG模板的导向作用有关。PL谱表明样品在413-464nm内有很强的蓝光发射特性，这与样品的微观结构有很大关系。

Pure and fine crystallized ZnO nanorods and its 3D self-assembled microstructures were synthesized by microwave-assisted hydrothermal method using Zn（NO3 ）2 . 6H2 O, NaOH and PEG-2000 as raw materials. The as-prepared samples were studied by EDS, XPS, SEM, TEM, and FTIR, the photolundnescenee property of the samples was investigated by PL spectroscopy. The growth mechanism of ZnO nanorods and its 3D self-assembled microstructures was also briefly analyzed. The results show that the average diameter and length of ZnO rods are about 300nm and 1μm, whereas the diameter of 3D self-assembled ZnO microstructures is about 2μm. The growth process of 3D self-assembled microstructures is possibly associated with the directing effect of PEG template. Furthermore, the PL spectra show that the as-prepared samples exhibited broad blue emission in the band range of 413-464nm, and its photoluminescence property is highly related to its microstructures.