铒取代锰铜铁氧体纳米颗粒:合成、结构、磁性和抗菌活性

IF 1.5 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
N. I. Abu-Elsaad, Rabab A. Metwally, A. S. Nawara
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引用次数: 0

摘要

本研究采用柠檬酸盐-硝酸盐自燃烧法制备尖晶石铁素体纳米粒子Mn0.5Cu0.5ErxFe2−xO4,其中0.0≤x≤0.075。分析了掺铒对抗菌、显微结构、形态和磁性的影响。通过对Er掺杂样品的结构研究,发现其为纯单相立方结构,但在x = 0.075处出现了第二相。结果表明:Er3+浓度达到x = 0.06时,随着Er3+浓度的增加,晶格参数逐渐增大,之后在x = 0.075处开始下降,介于8.432 ~ 8.446 Å之间。TEM图像显示了纳米尺度和立方尖晶石结构。锰铜纳米铁氧体中Er3+含量的增加引起磁性能的显著变化。矫顽力变化范围为93.60 ~ 114.89 G,饱和磁化强度(54.83 ~ 40.42 emu/ G)和剩磁强度(11.57 ~ 7.61 emu/ G)总体呈下降趋势。微波频率测量结果表明,铁氧体可以应用于无线通信技术。对MCF纳米颗粒对蜡样芽孢杆菌、金黄色葡萄球菌、铜绿假单胞菌、尖孢镰刀菌、黄曲霉、土霉、烟曲霉、黑霉和根霉等病原微生物的抑菌效果进行了评价,结果表明,掺铒浓度为0.03和0.075的MCF纳米颗粒对上述所有微生物的生长均有增强的抑制作用。当掺铒浓度为0.075时,抑制效果最好,平均晶粒尺寸为39.16 nm,高于未掺铒浓度为0.03时的抑制效果,平均晶粒尺寸为49.36 nm。微生物学研究表明,这些纳米颗粒可以作为一种有前景的抗微生物剂,降低对铜绿假单胞菌的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Erbium Substituted Mn-Cu Ferrite Nanoparticles: Synthesis, Structural, Magnetic, and Antimicrobial Activity Properties

In this study, the citrate–nitrate auto combustion process was used to create spinel ferrite nanoparticles Mn0.5Cu0.5ErxFe2−xO4, where 0.0 ≤ x ≤ 0.075. An analysis was conducted to evaluate the influence of erbium doping on the antimicrobial, microstructural, morphological, and magnetic possessions. A pure single-phase cubic structure is revealed by the structural study of the produced samples with Er doping, but the second phase emerges at x = 0.075. Results show that the lattice parameter grows with incorporating Er3+ concentration up to x = 0.06, after which it starts to drop at x = 0.075, which lies between 8.432 and 8.446 Å. The TEM pictures revealed nanoscale dimensions and a cubic spinel structure. A rise in the Er3+ content in Mn-Cu nanoferrites caused a dramatic variation in the magnetic properties. The coercivity varied from 93.60 to 114.89 G, whereas the saturation magnetization (ranging from 54.83 to 40.42 emu/g) and remanence (from 11.57 to 7.61 emu/g) showed a general decreasing trend. The results of the microwave frequency measurements show that ferrites can be used in wireless communication technology. The evaluation of the antimicrobial efficacy of MCEF nanoparticles against pathogenic microorganisms, including Bacillus cereus, Staphylococcus aureus, Pseudomonas aeruginosa, Fusarium oxysporum, Aspergillus flavus, A. terreus, A. fumigatus, A. niger, and Rhizopus sp., demonstrated that MCF nanoparticles doped with erbium at concentrations of 0.03 and 0.075 exhibit enhanced inhibitory effects on the growth of all aforementioned microorganisms. The highest inhibition was observed at an erbium concentration of 0.075, with a mean crystallite size of 39.16 nm, surpassing the inhibition at 0.03 concentration, which had an average size of 49.36 nm, in comparison to the undoped nanoparticles. The microbiological studies demonstrate that these nanoparticles may serve as a prospective antimicrobial agent with reduced effects on P. aeruginosa.

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来源期刊
Brazilian Journal of Physics
Brazilian Journal of Physics 物理-物理:综合
CiteScore
2.50
自引率
6.20%
发文量
189
审稿时长
6.0 months
期刊介绍: The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.
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