ABSTRACT

Chemical precipitated and followed by calcinations is a versatile process for synthesising undoped ZnO and Mn (5, 10 and 15 wt%) doped ZnO nanoparticles at pH-10 and calcinations temperature of 450°C for 2 hours were followed for synthesising all the samples. The structural properties evaluated via XRD pattern revealed the hexagonal wurzite phase and with the grain size of 19 to 9 nm. Variation in the microstructural properties as function of dopant concentration was attributed using standard relations. The morphological and cross verification of structural properties were made via HRTEM analysis. Wide, direct allowed band gap property and narrow size distributed particles nature were confirmed through UV-visible absorption spectra with blue shifted peaks. The bandgap values got increased on increasing the dopant concentration. The presences of functional groups of the prepared samples were also confirmed by FTIR. Bands below 700 cm⁻¹ assigns the Metal-oxygen framework of the sample. The antibacterial efficiency of the prepared nanoparticles was evaluated for gram positive bacterial strains namely Staphylococcus aureus and Bcaillus subtilis.

摘要

化学沉淀和随后的煅烧是在 pH-10 下合成未掺杂的 ZnO 和 Mn（5、10 和 15 wt%）掺杂的 ZnO 纳米颗粒的通用工艺，然后在 450°C 的煅烧温度下进行 2 小时以合成所有样品。通过 XRD 图案评估的结构特性显示六方纤锌矿相，晶粒尺寸为 19 至 9 nm。使用标准关系归因于作为掺杂剂浓度函数的微观结构特性的变化。通过 HRTEM 分析对结构特性进行形态学和交叉验证。通过具有蓝移峰的紫外-可见吸收光谱证实了宽、直接允许的带隙特性和窄尺寸分布的颗粒性质。随着掺杂剂浓度的增加，带隙值增加。FTIR也证实了制备样品的官能团的存在。700 厘米以下的带^-1指定样品的金属-氧框架。对所制备的纳米颗粒对革兰氏阳性菌株即金黄色葡萄球菌和枯草芽孢杆菌的抗菌效率进行了评估。