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首页> 外文期刊>RSC Advances >Facile surface modification of nickel ferrite nanoparticles for inherent multiple fluorescence and catalytic activities
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Facile surface modification of nickel ferrite nanoparticles for inherent multiple fluorescence and catalytic activities

机译：镍铁氧体纳米粒子的便捷表面修饰，具有固有的多重荧光和催化活性

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We synthesized biocompatible NiFe2O4 nanoparticles (NPs) with diameters below 10 nm by coating their surface with a tartrate ligand, which interestingly give rise to photoluminescence covering the entire visible region. The analyses with various spectroscopic tools reveal that the reason behind the unique fluorescence properties of functionalized NiFe2O4 NPs is ligand-to-metal charge-transfer transition from the highest occupied energy level of tartrate ligand to the lowest unoccupied energy level of Ni2+ and d–d transitions centered over Ni2+ ions in the NPs. These fluorescent NPs are also found to be suitable for cell imaging. Moreover, the functionalized NiFe2O4 NPs show a good catalytic activity on biologically and environmentally toxic pigments, such as bilirubin and methylene blue which leads to their wide application towards therapeutics and waste water treatment. We believe that the developed multifunctional NiFe2O4 NPs would stimulate the opportunities for advanced biomedical applications.
机译：我们通过在表面涂覆一层直径小于10 nm的生物相容性NiFe 2 O 4 纳米颗粒（NPs）酒石酸盐配体，有趣的是它引起了覆盖整个可见光区域的光致发光。各种光谱学工具的分析表明，功能化NiFe 2 O 4 NPs独特的荧光特性背后的原因是从酒石酸配体的最高占据能级到Ni 2 + 的最低未占据能级的配体到金属的电荷转移跃迁，而d-d跃迁居中NP中的Ni 2 + 离子。还发现这些荧光NP适合细胞成像。此外，功能化的NiFe 2 O 4 NPs对生物和环境毒性颜料表现出良好的催化活性，例如作为胆红素和亚甲蓝，使其广泛用于治疗和废水处理。我们认为，开发的多功能NiFe 2 O 4 NP将刺激先进生物医学应用的机会。

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