Abstract The eco-friendly synthetic approach for preparing CeO2-NPs using C. procera flower extract. The synthesized CeO2-NPs were studied for their UV–Vis, XRD and HR-TEM. The X-ray diffraction studies confirmed the cubic structure of synthesized CeO2-NPs with an average crystallite size of 7 nm. High Resolution Transmission Electron Microscope (HR-TEM) images showed that the CeO2-NPs possessed spherical shape and particle size of 21 nm. The photocatalytic degradation of methyl orange (MO) dye under sunlight irradiation by biosynthesized CeO2-NPs was analyzed. The synthesized CeO2-NPs exhibited 98% degradation activity against MO dye. Furthermore, antibacterial activity of C. procera flower extract and biosynthesized CeO2-NPs were studied. The biosynthesized CeO2-NPs exhibits a important antibacterial activity against Gram negative bacteria Escherichia coli and Pseudomonas aeruginosa than Gram positive bacteria.

中文翻译：

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菖蒲花提取物绿色合成氧化铈纳米粒子及其光催化降解和抗菌活性

摘要 一种使用原木花提取物制备CeO2-NPs 的环保合成方法。研究了合成的 CeO2-NPs 的 UV-Vis、XRD 和 HR-TEM。X 射线衍射研究证实了合成的 CeO2-NPs 的立方结构，平均晶粒尺寸为 7 nm。高分辨率透射电子显微镜 (HR-TEM) 图像显示 CeO2-NPs 具有球形形状和 21 nm 的粒径。分析了生物合成的 CeO2-NPs 在阳光照射下光催化降解甲基橙 (MO) 染料。合成的 CeO2-NPs 对 MO 染料具有 98% 的降解活性。此外，还研究了 C. procera 花提取物和生物合成的 CeO2-NPs 的抗菌活性。