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Magnetic nanoparticles of Ni/NiO nanostructured in film form synthesized by dead organic matrix of yeast

机译：由酵母的死有机基质合成的薄膜状Ni / NiO纳米磁性纳米颗粒

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摘要

An innovative sustainable protocol of nanobiotechnology has been developed to synthesize Ni/NiO magnetic nanoparticles, nanostructured in film form, through a dead organic matrix of the yeast Rhodotorula mucilaginosa, which was isolated from the Amazon region. It is a synergistic strategy that utilizes green technology, thus minimizing environmental impact and reducing costs. The best conditions for the adsorption of the metal through the dead organic matrix and subsequent synthesis of the nanoparticles were monitored by analyzing the biosorption of nickel by the yeast. The structural characteristics of the film-forming nanoparticles were investigated via high-resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (FTIR). The magnetic properties of the nanoparticles produced by the dead organic matrix were determined in a superconducting quantum interference device (SQUID). Results indicate that the Ni/NiO nanoparticles are mainly spherical, with an average size of 5.5 nm, present magnetic properties, synthesized extracellularly and involve the proteins of the yeast, which probably confer organization in the film form. Such natural bioprocess suggests a rational protocol strategy as a template for the industrial-scale synthesis of magnetic nanoparticles of metals from the dead organic matrix of yeast and also provides a possible green system of nanobioremediation of metals from wastewater.
机译：已开发出一种创新的可持续性纳米生物技术方案，可以通过分离自亚马逊地区的酵母Rhodotorula mucilaginosa的死有机基质合成膜形式纳米结构的Ni / NiO磁性纳米颗粒。这是一种利用绿色技术的协同策略，从而最大程度地减少了对环境的影响并降低了成本。通过分析酵母对镍的生物吸附，监测了金属通过死有机基质吸附和随后合成纳米颗粒的最佳条件。通过高分辨率透射电子显微镜（HRTEM），原子力显微镜（AFM），X射线光电子能谱（XPS）和红外光谱（FTIR）研究了成膜纳米颗粒的结构特征。在超导量子干涉仪（SQUID）中确定了由死有机基质产生的纳米颗粒的磁性。结果表明，Ni / NiO纳米颗粒主要为球形，平均尺寸为5.5 nm，具有磁性，在细胞外合成，并涉及酵母的蛋白质，可能以薄膜形式提供组织。这种自然的生物过程提出了一种合理的方案策略，作为从酵母的死有机基质工业规模合成金属磁性纳米颗粒的模板，并且还为废水中金属的纳米生物修复提供了可能的绿色系统。

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