A novel natural reducing agent for the preparation of cerium oxide nanoparticles based on the saffron by-product: Characterization, antioxidant and antibacterial activity for nutritional applications

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2024-10-13 DOI:10.1016/j.nanoso.2024.101381

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引用次数: 0

Abstract

The study concerns the valorization of Moroccan saffron by-products in the synthesis of metallic oxide nanoparticles. Cerium oxide nanoparticles (CeO₂ NPs) were synthesized in an environmentally friendly process using an aqueous extract of saffron by-products. The characterization of the CeO₂ NPs and the investigation of their scavenging activity of free radicals using 2-diphenyl-1-picrylhydrazyl (DPPH) method, as well as their antibacterial activity with regard to their application in food products have been studied. The Fourier-transformed infrared spectroscopy (FTIR) analysis confirmed that the active compounds of saffron pruned flowers extracts were involved in the reduction and stabilization of CeO₂ NPs. Scanning electron microscopy (SEM), and X-ray diffraction (XRD) analysis revealed the homogeneous distribution and the crystalline form of CeO₂ NPs, respectively. Moreover, the green CeO₂ NPs showed high inhibition percentages (72 %) and strong growth inhibition of the majority of pathogenic bacteria tested, with inhibition zone diameters ranging from 2 to 5 mm.

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一种基于藏红花副产品制备氧化铈纳米粒子的新型天然还原剂：营养应用中的表征、抗氧化和抗菌活性

本研究涉及摩洛哥藏红花副产品在合成金属氧化物纳米粒子中的应用。研究人员使用藏红花副产品的水提取物，以环保工艺合成了氧化铈纳米粒子（CeO2 NPs）。研究了 CeO2 NPs 的特性，并使用 2-二苯基-1-苦基肼（DPPH）法调查了它们清除自由基的活性，以及它们在食品中应用的抗菌活性。傅立叶变换红外光谱（FTIR）分析证实，藏红花剪枝花提取物中的活性化合物参与了 CeO2 NPs 的还原和稳定。扫描电子显微镜（SEM）和 X 射线衍射（XRD）分析分别显示了 CeO2 NPs 的均匀分布和结晶形态。此外，绿色 CeO2 NPs 显示出很高的抑制率（72%），对大多数病原菌的生长有很强的抑制作用，抑制区直径在 2 至 5 毫米之间。

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .