The microwave irradiation approach was adapted to prepare bismuth doped Cadmium Oxide nanostructures with varied Bi doping levels (1%, 3%, and 5%). Analytical research was conducted on the impact of Bi doping on the structure, crystallite size, shape, band gap, and antimicrobial behavior of CdO nanostructures. All materials developed polycrystalline and cubic structures with (111), (200), and (311) orientations, according to X-ray diffraction spectra. Particles are homogeneously distributed in SEM pictures, and Bi doping has an effect on the morphology. Additionally, as the level of Bi-doping is increased, grain size reduces from 40 to 20 nm. The TEM micrographs revealed agglomerated spherical shaped particles. With increasing amounts of Bi doping in the CdO nanostructures, the shapes and distribution of particles changed. With increasing Bi doping concentration, the energy band gap shifted from 1.94 to 2.2 eV. The antibacterial activity of pure and Bi doped CdO nanoparticles was tested using the Plate count method. CdO and Bi-CdO nanoparticles were investigated for their size-dependent antibacterial efficacy against G. negative and G. positive microorganisms. 5% of Bi doping level combined with a smaller particle size results in a toxicity of 89% for G. negative pathogens and 78% for G. positive pathogens.

微波辐射方法适用于制备具有不同 Bi 掺杂水平（1%、3% 和 5%）的铋掺杂氧化镉纳米结构。对 Bi 掺杂对 CdO 纳米结构的结构、微晶尺寸、形状、带隙和抗菌行为的影响进行了分析研究。根据 X 射线衍射光谱，所有材料都形成了具有 (111)、(200) 和 (311) 取向的多晶和立方结构。粒子在 SEM 图像中均匀分布，Bi 掺杂对形貌有影响。此外，随着 Bi 掺杂水平的增加，晶粒尺寸从 40 nm 减小到 20 nm。TEM 显微照片显示附聚的球形颗粒。随着 CdO 纳米结构中 Bi 掺杂量的增加，颗粒的形状和分布发生了变化。随着 Bi 掺杂浓度的增加，能带隙从 1.94 eV 变为 2.2 eV。使用平板计数法测试纯和 Bi 掺杂的 CdO 纳米粒子的抗菌活性。研究了 CdO 和 Bi-CdO 纳米颗粒对 G. 阴性和 G. 阳性微生物的大小依赖性抗菌功效。5% 的 Bi 掺杂水平与较小的粒径相结合，导致 G. 阴性病原体的毒性为 89%，G. 阳性病原体的毒性为 78%。