高度均一ZnO纳米梭的水热法制备及其性能

摘要

以六亚甲基四胺和硝酸锌为原料,采用水热法在90℃条件下反应24h,于Si衬底上制备出一维ZnO纳米梭材料.采用场发射扫描电镜、X射线衍射仪和高分辨透射电镜等方法对样品形貌和晶体结构进行了表征.结果表明,所得ZnO纳米梭形貌一致、尺寸均匀,为六方纤锌矿型结构,具有良好的结晶性能.对ZnO纳米梭的光致发光性能的研究表明,该纳米梭具有很强的紫外发光峰,缺陷发光很弱,说明其结晶质量良好.本文还对ZnO纳米梭的水热反应机理和形核长大机制进行了探讨.%One-dimensional ZnO nanoshuttles were synthesized on Si substrates by a hydrothermal method at 90 ℃ for 24 h using hexamethyenetetramine ( HMT) and zinc nitrate as raw materials. The morphology and crystal structure were characterized by field-emission scanning electron microscopy, X-ray diffraction, and high resolution transmission electron microscope. All the data indicated that ZnO nanoshuttles are homogeneous in morphology and uniform in size, with a single-crystal hexagonal wurtzite structure and acceptable crystal quality. Room-temperature photoluminescent spectra showed that a strong near-bang-edge UV emission peak and a much weak defect emission, which suggested that ZnO nanoshuttles have a good optical quality. The nu-cleation and growth mechanism in the reaction process of ZnO nanoshuttles were also discussed in this work.