Abstract In this study, the effect of zinc precursor ratio on structural, morphology and luminescent properties of zinc oxide (ZnO) nanoparticles (NPs) prepared by cationic surfactant-assisted method was studied. ZnO NPs were prepared at room temperature by increasing Zn 2+ : CTAB mole ratio. The pristine ZnO samples showed phase-purity (without need for calcination) as shown by X-ray diffractograms (XRD). Nitrogen adsorption − desorption analysis showed that the samples exhibit Type III isotherm and H3 hysteresis with mesoporosity. The triangular- to quadrilateral-shaped morphological evolution of the ZnO NPs with increasing concentrations of zinc ions was confirmed by SEM and TEM images of the samples. The UV–Vis–DRS studies showed blue-shifted λ max (band gap) in all the ZnO samples which indicated their nanostructured nature. The photoluminescence spectra of these ZnO samples show emissions in UV and visible regions. The mechanism of formation of nanostructured ZnO was suggested based on the model reported for mesoporous silica synthesized in CTAB medium.

中文翻译：

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锌前驱体比例对 CTAB 介质中合成的 ZnO 纳米粒子形貌和发光性能的影响

摘要 本研究研究了锌前驱体配比对阳离子表面活性剂辅助法制备的氧化锌(ZnO)纳米颗粒(NPs)的结构、形貌和发光性能的影响。通过增加 Zn 2+ : CTAB 摩尔比在室温下制备 ZnO NP。如 X 射线衍射图 (XRD) 所示，原始 ZnO 样品显示出相纯度（无需煅烧）。氮吸附-解吸分析表明，样品表现出 III 型等温线和 H3 滞后与中孔。样品的 SEM 和 TEM 图像证实了随着锌离子浓度的增加，ZnO NPs 的三角形到四边形形态演变。UV-Vis-DRS 研究显示所有 ZnO 样品中的蓝移 λ max（带隙）表明它们的纳米结构性质。这些 ZnO 样品的光致发光光谱显示在紫外线和可见光区域的发射。基于在 CTAB 介质中合成的介孔二氧化硅所报道的模型，提出了纳米结构 ZnO 的形成机制。