Abstract In this study we prepared zinc oxide (ZnO) nanoparticles using the polyol method with zinc acetate and/or sodium acetate in a propylene glycol medium with varied hydrolysis reaction time (10, 60 and 300 min). It was observed that the hydrolysis reaction time and the concentration of acetate ions had a strong effect on the morphology and size of ZnO nanoparticles (NPs). X-ray diffraction (XRD) patterns revealed that all samples crystalized in the typical ZnO wurtzite structure and Rietveld refinement was used to characterize the structure and to suggest a preferential growth. Fourier transformed infrared spectroscopy (FTIR) was performed and showed the typical ZnO band, no impurity signals, as well as differences in A1 and E1 vibration modes due to different crystal growth in the structure. Raman scattering was carried out to determine the defects in the structure of ZnO, such as interstitial oxygen and oxygen vacancies. Transmission electron microscope (TEM) images revealed that ZnO NPs size and shape are strongly dependent on the hydrolysis reaction time and addition of acetate counter ions, respectively. The change in shape and size has also affected the optical properties, such as the optical bandgap (Eg) of ZnO NPs and their florescence.

中文翻译：

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颗粒形状和尺寸对多元醇法合成氧化锌形貌和光学性能的影响

摘要 在本研究中，我们使用多元醇法在丙二醇介质中用乙酸锌和/或乙酸钠制备氧化锌 (ZnO) 纳米颗粒，水解反应时间不同（10、60 和 300 分钟）。观察到水解反应时间和乙酸根离子浓度对 ZnO 纳米粒子 (NPs) 的形态和尺寸有很大影响。X 射线衍射 (XRD) 图案显示，所有样品均以典型的 ZnO 纤锌矿结构结晶，Rietveld 精修用于表征结构并表明优先生长。进行傅里叶变换红外光谱 (FTIR) 并显示出典型的 ZnO 带，没有杂质信号，以及由于结构中晶体生长不同而导致的 A1 和 E1 振动模式的差异。进行拉曼散射以确定ZnO结构中的缺陷，例如间隙氧和氧空位。透射电子显微镜 (TEM) 图像显示，ZnO NPs 的大小和形状分别强烈依赖于水解反应时间和醋酸盐反离子的添加​​。形状和尺寸的变化也影响了光学性质，例如 ZnO NPs 的光学带隙 (Eg) 及其荧光。