共查询到10条相似文献,搜索用时 46 毫秒
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G.Murugadoss 《材料科学技术学报》2012,28(7):587-593
Different morphologies of undoped and transition metals(Mn,Co and Ni) doped one-dimensional(1D) ZnO nanocrystals were successfully synthesized by chemical method in an air atmosphere using polyvinylpyrrolidone(PVP) as a surfactant.The structure and optical properties were studied by scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),thermal gravimetric analysis(TGA),ultraviolet visible(UV-vis) absorption spectra and photoluminescence(PL) spectra.The doped ZnO nanorods exhibited a blue-shifted band gap and enhanced ultraviolet(UV) emission.In addition defect related emission was observed for the doped ZnO. 相似文献
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类单晶氧化锌纳米棒的制备与表征 总被引:6,自引:0,他引:6
用简单的无催化剂、高温热蒸发方法制备氧化锌纳米棒,得到了具有良好晶体结构和规则外形的ZnO纳米棒,长度为(1-5)μm,直径约几十纳米.测量了ZnO纳米棒的光致发光特性.讨论了实验条件对纳米棒生长结果的影响,并对生长机理做了初步探讨. 相似文献
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固相配位化学反应法合成ZnO纳米粉体 总被引:21,自引:0,他引:21
采用固相配位化学反应法制备ZnO的纳米粉体,并通过差热分析,热失重和红外光谱分析ZnO纳米粉体的合成过程。用X射线衍射和透射电子显微镜表征ZnO纳米粉体的全,形貌及大小。研究结果表明:400℃,热分解2h,可得到平均晶粒尺寸约为10nm的ZnO纳米粉体,其相结合为闪锌矿结构。同时发现随着热分解温度的增加,晶粒尺寸缓慢长大。粉体粒子的团聚一肌为软团聚,很容易在超声波作用下分散开。 相似文献
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采用超声化学方法制备ZnO纳米颗粒,透射电子显微镜(TEM)测试结果显示,合成出的ZnO纳米颗粒尺寸均匀,形状规则。而X-射线衍射(XRD)结果表明,提高反应温度可以促进ZnO的生长。因而,对于合成单一分散的ZnO纳米晶而言,声化学方法是一种非常简便的方法。 相似文献
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Chunna YANG Ying LI Ge XU Xiuliang MA 《材料科学技术学报》2007,23(5):583-586
Single-crystalline ZnO nanorods have been synthesized by a simple solvothermal process at low temperature. Transmission electron microscopy (TEM) observations have confirmed that the as-synthesized products have rod-like morphologies with diameters ranging from several nanometers to 30 nm and lengths from 100 nm to 2 μm. Such hexagonal ZnO nanorods are structurally uniform and the growth direction is identified to be [0001]. Growth mechanism of the ZnO nanorods was proposed. 相似文献