Currently, the use of sustainable chemistry as an ecological alternative for the generation of products or processes that are free of a polluting substance has assumed a preponderant role. The aim of this work is to propose a bioinspired, facile, low cost, non-toxic, and environmentally friendly alternative to obtaining magnetic nanoparticles with a majority phase of magnetite (Fe₃O₄). It is important to emphasize that the synthesis was based on the chemical reduction through the Cnicus benedictus extract, whose use as reducing agent has not been reported in the synthesis of iron oxides nanoparticles. In addition, the Cnicus benedictus is an abundant endemic plant in Mexico with several medicinal properties and a large number of natural antioxidants. The obtained nanoparticles exhibited significant magnetic and antibacterial properties and an enhanced photocatalytic activity. The crystallite size of the Fe₃O₄ nanoparticles (Fe₃O₄ NP’s) was calculated by the Williamson-Hall method. The photocatalytic properties of the Fe₃O₄ NP’s were studied by kinetics absorptions models in the Congo red (CR) degradation. Finally, the antibacterial effects of the Fe₃O₄ NPs were evaluated mediated the Kirby–Bauer method against Escherichia coli and Staphylococcus aureus bacteria. This route offers a green alternative to obtain Fe₃O₄ NPs with remarkable magnetic, photocatalytic, and antibacterial properties.

中文翻译：

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本尼迪克特提取物生物合成的Fe3O4磁性纳米粒子：有机染料降解及抗菌行为的光催化研究

当前，在产生无污染物质的产品或过程的过程中，可持续化学作为生态替代品的使用已占主导地位。这项工作的目的是提出一种具有生物启发性，易用，低成本，无毒且对环境友好的替代方法，以获得具有多数磁铁矿（Fe ₃ O ₄）相的磁性纳米粒子。重要的是要强调，合成是基于通过本尼迪克尼迪克提取物的化学还原，在氧化铁纳米粒子的合成中尚未报道其用作还原剂。此外，本尼迪克犬是墨西哥丰富的地方植物，具有多种药用特性和大量天然抗氧化剂。所获得的纳米颗粒表现出显着的磁性和抗菌性能以及增强的光催化活性。通过Williamson-Hall方法计算Fe ₃ O ₄纳米颗粒（Fe ₃ O ₄ NP's）的微晶尺寸。通过动力学吸收模型研究了刚果红（CR）降解过程中Fe ₃ O ₄ NP的光催化性能。最后，介导了柯比鲍尔方法介导的Fe ₃ O ₄ NPs对大肠杆菌和大肠杆菌的抗菌作用。金黄色葡萄球菌细菌。该途径为获得具有显着磁性，光催化和抗菌性能的Fe ₃ O ₄ NP提供了绿色的替代方法。