Zinc oxide (ZnO) nanoparticles have attracted significant interest in a number of applications ranging from electronics to biomedical sciences due to their large exaction binding energy (60 meV) and wide bandgap of 3.37 eV. In the present study, we report the low-cost bacterium based “eco-friendly” efficient synthesis of ZnO nanoparticles by using the zinc-tolerant bacteria Serratia nematodiphila. The physicochemical characterization of ZnO nanoparticles was performed by employing UV-vis spectroscopy, XRD, TEM, DLS, Zeta potential, and Raman spectroscopy. The antimicrobial and antifungal studies were investigated at different concentrations using the agar well-diffusion method, whereby the microbial growth rate decreases with the increase in nanoparticle concentration. Further, photocatalytic performance studies were conducted by taking methyl orange (MO) as a reference dye.

氧化锌（ZnO）纳米粒子因其严格的结合能（60 meV）和3.37 eV的宽带隙而在电子学到生物医学等许多领域引起了广泛的兴趣。在本研究中，我们报告了通过使用耐锌细菌，以低成本细菌为基础的“生态友好”高效合成ZnO纳米颗粒线虫沙门氏菌。ZnO纳米粒子的理化特性是通过使用紫外可见光谱，XRD，TEM，DLS，Zeta电位和拉曼光谱进行的。使用琼脂充分扩散方法研究了不同浓度的抗微生物和抗真菌研究，其中微生物生长速率随纳米颗粒浓度的增加而降低。此外，以甲基橙（MO）为参考染料进行了光催化性能研究。