Ghalib Basmah, Hessien Manal
Department of Chemistry, College of Science, King Faisal University, P.O. Box 400, 31982, Alahsa, Saudi Arabia.
Sci Rep. 2025 May 13;15(1):16653. doi: 10.1038/s41598-025-00851-4.
A novel henna-green/microwave-assisted hydrothermal method was applied to synthesize cobalt-manganese spinel ferrite nanocomposites. This eco-friendly approach, utilizing henna extract as a capping agent, combined with a microwave-assisted hydrothermal technique, offers advantages such as environmental sustainability, time, and energy efficiency. Examined parameters included pH (10 ± 1), temperatures (175 ± 25 °C), durations (15, 30 ± 15 min), and forty milliliters of henna extract prepared with varying henna quantities (five, ten, or fifteen grams per hundred milliliters of water). Post-optimization, various substituents like nickel and chromium were explored. Samples were calcined at 500 °C, 700 °C, and 900 °C, and analyzed using Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and magnetic property assessments. XRD revealed a cubic face-centered spinel ferrite and hematite structure. SEM and TEM showed diverse morphologies (rod-like, flower-like, polygonal) influenced by synthesis conditions and substituents. XPS confirmed Co, Mn, Ni, Fe, and Cr presence in the spinel lattice. The nanocomposites exhibited ferromagnetic behavior with saturation magnetization (M) values from 23.53 to 55.15 emu/g. Chromium substitution showed the best antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans. This study highlights the potential of the henna-green/microwave-assisted hydrothermal method for controlled synthesis of substituted cobalt spinel ferrite nanocomposites with tunable properties for various applications.
采用一种新颖的指甲花-绿色/微波辅助水热法合成钴锰尖晶石铁氧体纳米复合材料。这种环保方法利用指甲花提取物作为封端剂，并结合微波辅助水热技术，具有环境可持续性、节省时间和能源效率等优点。考察的参数包括pH值（10±1）、温度（175±25℃）、反应时间（15、30±15分钟）以及用不同量指甲花（每100毫升水5克、10克或15克）制备的40毫升指甲花提取物。优化后，探索了镍和铬等各种取代基。样品在500℃、700℃和900℃下煅烧，并使用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和磁性性能评估进行分析。XRD显示为立方面心尖晶石铁氧体和赤铁矿结构。SEM和TEM显示了受合成条件和取代基影响的多种形态（棒状、花状、多边形）。XPS证实了尖晶石晶格中存在Co、Mn、Ni、Fe和Cr。纳米复合材料表现出铁磁行为，饱和磁化强度（M）值为23.53至55.15emu/g。铬取代对大肠杆菌、金黄色葡萄球菌和白色念珠菌表现出最佳的抗菌活性。本研究突出了指甲花-绿色/微波辅助水热法在可控合成具有可调性能的取代钴尖晶石铁氧体纳米复合材料以用于各种应用方面的潜力。
