Pure, iron-doped, and glucose capped ZnO nanoparticles (NPs) have been synthesized by a chemical precipitation method. The structural, optical, and photoluminescence properties of all the prepared samples are examined systematically. X-ray diffraction patterns of all the samples exhibited a single hexagonal wurtzite structure with an average crystallite size ranging from 1.01 to 1.78 nm. Transmission electron microscope images showed the spherical shaped NPs in the range of between 17 and 19 nm. Fourier transform of infrared spectroscopy (FTIR) studies confirmed the presence of octahedral sites around 470–489 cm⁻¹ and tetrahedral sites at 616 cm⁻¹ in pristine and doped samples. The calculated optical bandgap energy for pure, Fe doped and glucose capped ZnO NPs are found to be 3.82, 3.80, and 3.63 eV, respectively, and the variations in the bandgap is ascribed to the Fermi level, which is in the conduction band resulting in the absorption edge shifting towards the higher/ lower energy. It is observed that Fe doped and glucose capped ZnO NPs showed a strong photoluminescence signal than the pure ZnO NPs. The green emission is quenched. The blue emission is enhanced due to the deactivation of oxygen vacancies on the surfaces due to the smaller particle sizes as a result of the quantum confinement effect.

已通过化学沉淀法合成了纯的，铁掺杂的和葡萄糖封端的ZnO纳米颗粒（NPs）。系统检查了所有制备样品的结构，光学和光致发光特性。所有样品的X射线衍射图显示出单个六方纤锌矿结构，其平均微晶尺寸为1.01至1.78nm。透射电子显微镜图像显示球形NP在17至19 nm之间。红外光谱（FTIR）的傅立叶变换研究证实，在470-489 cm ^-1附近存在八面体位置，在616 cm ^-1附近存在四面体位置在原始和掺杂的样品中。发现纯的，掺杂Fe的和掺杂葡萄糖的ZnO NP的计算带隙能量分别为3.82、3.80和3.63 eV，带隙的变化归因于费米能级，这在导带中导致吸收边移向更高/更低的能量。观察到，与纯ZnO NP相比，Fe掺杂和葡萄糖封端的ZnO NP显示出更强的光致发光信号。绿色发射被淬灭。由于量子限制效应的结果，由于较小的粒径而使表面上的氧空位失活，从而增强了蓝色发射。