ANTIOXIDANT ACTIVITY AND PHYSICO-CHEMICAL PROPERTIES OF GREEN SYNTHESIZED ZINC OXIDE NANOPARTICLES USING ERUCA SATIVA LEAF EXTRACT

Lina Y. Mohammed
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Abstract

The aim of this work is to synthesize zinc oxide (ZnO) nanoparticles from Eurca Sativa water extract which is a medicinal plant cultivated in home gardens in Kurdistan Region-Iraq. The biosynthesis of nanoparticles has been extensively studied due to their numerous applications. Among them, zinc oxide nanoparticles (ZnO NPs) have gained significant attention for wide range of its applications. To investigate the optical, chemical, structural, and morphological properties, different techniques; UV-VIS spectrophotometer, Fourier Transform Infrared Analysis (FT-IR), X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX) were used. The results revealed that typical ZnO absorption spectra exhibit a well-defined exciton band at 371.6 nm that is near the bulk exciton absorption of ZnO (373 nm) with an energy band gap of 3.029 eV, confirming the production of ZnO nanoparticles. FTIR study demonstrated the existence of bioactive compounds such as flavonoids, polyphenols, tannins, and saponins that can function as reducing and capping agents of ZnO nanoparticles. FESEM picture revealed that ZnO NPs show spherical morphologies with an average diameter of 71.07 nm.  The antioxidant activities of biosynthetic ZnO NPs were studied using non-enzymatic methods; 2,2-diphenyl-1-picrylhydrazyl (DPPH), reducing power assay, and total antioxidant activities. The results showed that the biosynthesized ZnO-NPs nanoparticles had significant antioxidants compared with ascorbic acid as a reference. The obtained results showed that the present method is eco-friendly, less cost-effective, and safe for human health and this method plays a vital role in the industrial and biomedicine fields.
利用杜仲叶提取物合成的绿色氧化锌纳米颗粒的抗氧化活性和理化性质
这项工作的目的是从库尔德斯坦地区(伊拉克)家庭菜园中种植的一种药用植物 Eurca Sativa 的水提取物中合成氧化锌(ZnO)纳米粒子。纳米粒子的生物合成因其用途广泛而被广泛研究。其中,氧化锌纳米粒子(ZnO NPs)因其广泛的应用而备受关注。为了研究纳米氧化锌的光学、化学、结构和形态特性,研究人员使用了不同的技术:紫外-可见分光光度计、傅立叶变换红外分析(FT-IR)、X 射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、能量色散 X 射线光谱(EDX)。研究结果表明,典型的氧化锌吸收光谱在 371.6 纳米处显示出一个清晰的激子带,接近氧化锌的体激子吸收(373 纳米),能带隙为 3.029 eV,这证实了氧化锌纳米粒子的产生。傅立叶变换红外光谱研究表明存在生物活性化合物,如黄酮类、多酚类、单宁酸和皂苷,它们可以作为氧化锌纳米粒子的还原剂和封端剂。FESEM 照片显示,氧化锌纳米粒子呈球形,平均直径为 71.07 nm。 研究人员采用 2,2-二苯基-1-苦基肼(DPPH)、还原力测定和总抗氧化活性等非酶方法研究了生物合成 ZnO NPs 的抗氧化活性。结果表明,与抗坏血酸作为参照物相比,生物合成的 ZnO-NPs 纳米粒子具有显著的抗氧化性。结果表明,该方法环保、成本低、对人体健康安全,在工业和生物医学领域发挥着重要作用。
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