Abstract Pure and Ag substituted cobalt ferrite nanoparticles (NPs) having the composition (1−x)CoFe2O4: xAg (x = 0.0, 0.2) were synthesized by a novel honey assisted combustion method in order to investigate their structural and magnetic properties along with their antibacterial activity. XRD patters confirm the spinel phase of CoFe2O4 and the presence of silver (Ag) nanoparticles in the spinel network. The incorporation of Ag in CoFe2O4 spinel structure enhanced the size of the unit cell, resulting to higher value of lattice parameter (a) compared to the pure CoFe2O4. The sintering process promoted the growth of the crystallite sizes (D). The crystallite sizes of the synthesized and annealed powders were found in the range of 24–41 nm. From the EDX studies, it seemed that the distribution of Ag nanoparticles was non-uniform. The saturation magnetization (Ms) and coercivity (Hc) of the powders were influenced by annealing as well as with the substitution of Ag. The highest value of saturation magnetization (60 emu/g) was obtained by the CoFe2O4 nanoparticles with the coercivity value 1358 Oe. The saturation magnetization and coercivity of Ag doped CoFe2O4 were less than that of pure CoFe2O4. The present cobalt ferrite nanoparticles and Ag doped cobalt ferrite nanoparticles have shown good antibacterial activities. But Ag doped cobalt ferrite nanoparticles seems to be the potential candidates for effective antibacterial activity. The structural and magnetic results along with the results of antibacterial activities are reported in the present manuscript.

中文翻译：

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蜂蜜助燃法制备银取代铁氧体钴纳米粒子的结构、形态和磁性研究及抗菌活性评价

摘要 为了研究它们的结构和磁性以及它们的磁性，通过一种新的蜂蜜辅助燃烧方法合成了具有 (1-x)CoFe2O4:xAg (x = 0.0, 0.2) 组成的纯和 Ag 取代的钴铁氧体纳米粒子 (NPs)。抗菌活性。XRD 图案证实了 CoFe2O4 的尖晶石相和尖晶石网络中银 (Ag) 纳米颗粒的存在。在 CoFe2O4 尖晶石结构中加入 Ag 增强了晶胞的尺寸，导致与纯 CoFe2O4 相比晶格参数 (a) 的值更高。烧结过程促进了微晶尺寸（D）的生长。合成和退火粉末的微晶尺寸在 24-41 nm 范围内。从 EDX 研究来看，Ag 纳米粒子的分布似乎是不均匀的。粉末的饱和磁化强度 (Ms) 和矫顽力 (Hc) 受退火以及 Ag 替代的影响。CoFe2O4 纳米颗粒的矫顽力值为 1358 Oe，饱和磁化强度最高 (60 emu/g)。Ag掺杂CoFe2O4的饱和磁化强度和矫顽力小于纯CoFe2O4的饱和磁化强度和矫顽力。本发明的铁氧体钴纳米粒子和Ag掺杂的铁氧体钴纳米粒子均表现出良好的抗菌活性。但是，Ag 掺杂的钴铁氧体纳米粒子似乎是有效抗菌活性的潜在候选者。本手稿报告了结构和磁性结果以及抗菌活性的结果。CoFe2O4 纳米粒子的矫顽力值为 1358 Oe，饱和磁化强度最高 (60 emu/g)。Ag掺杂CoFe2O4的饱和磁化强度和矫顽力小于纯CoFe2O4的饱和磁化强度和矫顽力。本发明的铁氧体钴纳米粒子和Ag掺杂的铁氧体钴纳米粒子均表现出良好的抗菌活性。但是，Ag 掺杂的钴铁氧体纳米粒子似乎是有效抗菌活性的潜在候选者。本手稿报告了结构和磁性结果以及抗菌活性的结果。CoFe2O4 纳米粒子的矫顽力值为 1358 Oe，饱和磁化强度最高 (60 emu/g)。Ag掺杂CoFe2O4的饱和磁化强度和矫顽力小于纯CoFe2O4的饱和磁化强度和矫顽力。本发明的铁氧体钴纳米粒子和Ag掺杂的铁氧体钴纳米粒子均表现出良好的抗菌活性。但是，Ag 掺杂的钴铁氧体纳米粒子似乎是有效抗菌活性的潜在候选者。本手稿报告了结构和磁性结果以及抗菌活性的结果。本发明的铁氧体钴纳米粒子和Ag掺杂的铁氧体钴纳米粒子均表现出良好的抗菌活性。但是，Ag 掺杂的钴铁氧体纳米粒子似乎是有效抗菌活性的潜在候选者。本手稿报告了结构和磁性结果以及抗菌活性的结果。本发明的铁氧体钴纳米粒子和Ag掺杂的铁氧体钴纳米粒子均表现出良好的抗菌活性。但是，Ag 掺杂的钴铁氧体纳米粒子似乎是有效抗菌活性的潜在候选者。本手稿报告了结构和磁性结果以及抗菌活性的结果。