Chemistry Department, Jomo Kenyatta University of Agriculture and Technology, P.O. Box 62000, 00200, Nairobi, Kenya.
Department of Biological and Physical Sciences, Karatina University, P.O. Box 1957-10101, Karatina, Kenya.
Sci Rep. 2023 Aug 28;13(1):14030. doi: 10.1038/s41598-023-41119-z.
In recent ages, green nanotechnology has gained attraction in the synthesis of metallic nanoparticles due to their cost-effectiveness, simple preparation steps, and environmentally-friendly. In the present study, copper oxide nanoparticles (CuO NPs) were prepared using Parthenium hysterophorus whole plant aqueous extract as a reducing, stabilizing, and capping agent. The CuO NPs were characterized via UV-Vis Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), powder X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Dynamic Light Scattering (DLS). The UV-Vis spectra of CuO NPs showed a surface plasmonic resonance band to occur at 340 nm. FTIR analysis revealed the presence of secondary metabolites on the surface of CuO NPs, with a characteristic Cu-O stretching band being identified at 522 cm. Scanning electron micrographs and transmission electron micrographs showed that CuO NPs were nearly spherical, with an average particle of 59.99 nm obtained from the SEM micrograph. The monoclinic crystalline structure of CuO NPs was confirmed using XRD, and crystallite size calculated using the Scherrer-Debye equation was found to be 31.58 nm. DLS showed the presence of nanoparticle agglomeration, which revealed uniformity of the CuO NPs. Furthermore, the degradation ability of biosynthesized nanoparticles was investigated against rifampicin antibiotic. The results showed that the optimum degradation efficiency of rifampicin at 98.43% was obtained at 65℃ temperature, 50 mg dosage of CuO NPs, 10 mg/L concentration of rifampicin solution, and rifampicin solution at pH 2 in 8 min. From this study, it can be concluded that CuO NPs synthesized from Parthenium hysterophorus aqueous extract are promising in the remediation of environmental pollution from antibiotics. In this light, the study reports that Parthenium hysterophorus-mediated green synthesis of CuO NPs can effectively address environmental pollution in cost-effective, eco-friendly, and sustainable ways.
在近代，由于绿色纳米技术具有成本效益高、制备步骤简单、环境友好等优点，在金属纳米粒子的合成中引起了人们的关注。本研究采用白花臭牡丹全植物水提物作为还原剂、稳定剂和封端剂来制备氧化铜纳米粒子（CuO NPs）。采用紫外可见分光光度计、傅里叶变换红外光谱（FTIR）、粉末 X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和动态光散射（DLS）对 CuO NPs 进行了表征。CuO NPs 的紫外可见光谱显示表面等离子体共振带在 340nm 处发生。FTIR 分析表明，CuO NPs 表面存在次生代谢物，特征 Cu-O 伸缩带在 522cm 处被识别。扫描电镜和透射电镜显示，CuO NPs 近球形，SEM 显微照片得到的平均粒径为 59.99nm。利用 XRD 证实了 CuO NPs 的单斜晶结构，并通过谢乐-德拜方程计算得到的晶粒尺寸为 31.58nm。DLS 显示出纳米颗粒的团聚存在，这表明 CuO NPs 的均匀性。此外，还研究了生物合成的纳米粒子对利福平抗生素的降解能力。结果表明，在 65℃温度、50mg CuO NPs 剂量、10mg/L 利福平溶液浓度和 pH2 的利福平溶液条件下，利福平的最佳降解效率为 98.43%，反应时间为 8min。从这项研究可以得出结论，由白花臭牡丹水提物合成的 CuO NPs 在修复抗生素造成的环境污染方面具有很大的潜力。在这方面，该研究报告了利用白花臭牡丹介导的绿色合成 CuO NPs 可以以经济高效、环保和可持续的方式有效地解决环境污染问题。
