In this study, zinc oxide (ZnO) nanocolloids (ZnONCs) were prepared in an electrical discharge machine using the electrical spark discharge method. ZnONCs comprising ZnO nanoparticles (ZnONPs) and zinc nanoparticles (ZnNPs) could be successfully prepared using metal electrodes with 99.97%-purity zinc (Zn) wire and deionized water as the dielectric fluid at normal temperature and pressure; chemical substances were not required in the preparation. According to the results of ultraviolet–visible spectroscopy, the ZnONP characteristic peak value was 345 nm. X-ray diffraction results indicated that ZnONCs had both Zn and ZnO crystallite orientations. Transmission electron microscopy results revealed that ZnONPs and ZnNPs exhibited elongated crystals measuring 30–50 nm, a ZnO d-spacing of 0.25 nm, and a Zn d-spacing of 0.21 nm. Raman and photoluminescence imaging results indicated favorable structural quality and crystallinity.

在这项研究中，使用电火花放电方法在放电机中制备了氧化锌（ZnO）纳米胶体（ZnONC）。在常温常压下，采用纯度为99.97％的锌（Zn）线和去离子水为介电体的金属电极，可以成功制备出包含ZnO纳米颗粒（ZnONPs）和锌纳米颗粒（ZnNPs）的ZnONC。制备中不需要化学物质。根据紫外可见光谱的结果，ZnONP特征峰为345 nm。X射线衍射结果表明ZnONCs同时具有Zn和ZnO晶体取向。透射电子显微镜结果表明，ZnONP和ZnNPs表现出拉长的晶体，尺寸为30–50 nm，ZnO d间距为0.25 nm，Zn d间距为0.21 nm。