Abstract

A valuable approach in green nanotechnology is the application of biomaterials in the synthesis of nanoparticles. In this project, we synthesized iron oxide nanoparticles in the phase of hematite (α-Fe₂O₃) by the aqueous extract of Laurus nobilis L. leaves in a simple and eco-friendly method. The nanoparticles were characterized using Ultraviolet–Visible spectroscopy (UV–Visible), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), transfer electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS). The results showed that the nanoparticles are crystalline, almost spherical like and partly as a hexagonal shape with an average size of 8.03 ± 8.99 nm. The antimicrobial activity of the synthesized nanoparticles was evaluated against three bacteria and two fungi. The results showed that the nanoparticles are moderately effective on the Gram-positive bacterium of Listeria monocytogenes and the fungi Aspergillus flavus and Penicillium spinulosum. The nanoparticles synthesized by this green method could be potentially useful as antifungal and antibacterial compound and, may be considered as gas sensors, light photo-catalysis and, semiconductor.

Graphic abstract

中文翻译：

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月桂叶的水提物绿色合成氧化铁纳米颗粒及其抗菌活性评估

摘要

绿色纳米技术中的一种有价值的方法是生物材料在纳米颗粒合成中的应用。在该项目中，我们在赤铁矿的相位合成的氧化铁纳米颗粒（的α-Fe ₂ ö ₃）通过的含水提取物月桂L.以简单且环保的方式离开。使用紫外-可见光谱（UV-Visible），傅立叶变换红外光谱（FT-IR），X射线衍射分析（XRD），扫描电子显微镜（SEM），转移电子显微镜（TEM）和能量色散X射线光谱（EDS）。结果表明，纳米粒子为晶体，几乎为球形，部分为六边形，平均尺寸为8.03±8.99 nm。评价了合成的纳米颗粒对三种细菌和两种真菌的抗菌活性。结果表明，该纳米颗粒上的革兰氏阳性细菌适度有效李斯特菌和真菌黄曲霉和旋青霉。通过这种绿色方法合成的纳米粒子可能潜在地用作抗真菌和抗菌化合物，并且可以被视为气体传感器，光催化和半导体。

图形摘要