铜（II）包覆的 Fe3O4 纳米颗粒作为一种有效的酶模拟物，用于过氧化氢的比色检测,Microchimica Acta

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铜（II）包覆的 Fe3O4 纳米颗粒作为一种有效的酶模拟物，用于过氧化氢的比色检测
Microchimica Acta ( IF 5.3 ) Pub Date : 2019-07-09 , DOI: 10.1007/s00604-019-3599-y
Hongying Liu , Langlang Zhu , Huan Ma , Jiajun Wen , Hanxiao Xu , Yubing Qiu , Linan Zhang , Lihua Li , Chunchuan Gu

摘要作者描述了具有优异过氧化物酶样活性的 Cu(II) 包覆的 Fe3O4) 纳米粒子 (NPs) 的制备。NPs 是通过 Cu(II) 离子与木质素磺酸钠的氧官能团之间的螯合形成的。通过扫描电子显微镜、透射电子显微镜、X 射线粉末衍射、X 射线光电子能谱和傅里叶变换红外光谱对纳米颗粒的形貌和结构进行了表征。NPs 的平均直径为 220 nm。它们被证明是可行的过氧化物酶模拟物，可以通过过氧化氢催化 3,3',5,5'-四甲基联苯胺的氧化，产生蓝色。这些发现用于设计比色测定，该测定在 2.5 至 100 μM H2O2 浓度范围内具有线性响应，检测限为 0.2 μM。该测定以其选择性、高灵敏度、良好的选择性、便携性和成本效益而著称。通过简单的策略成功制备了具有优异过氧化物酶样活性的图形抽象 Fe3O4-Cu2+ 纳米粒子，然后用于设计一种简便且灵敏的比色 H2O2 传感器。线性范围和检测限分别为2.5~100 μM和0.212 μM。

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Copper(II)-coated Fe3O4 nanoparticles as an efficient enzyme mimic for colorimetric detection of hydrogen peroxide

AbstractThe authors describe the preparation of Cu(II)-coated Fe3O4) nanoparticles (NPs) that possess excellent peroxidase-like activity. The NPs were formed by chelation between Cu(II) ions and the oxygen functional groups of sodium ligninsulfonate. The morphology and structure of the NPs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The NPs have an average diameter of 220 nm. They are shown to be viable peroxidase mimics that can catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine by hydrogen peroxide to produce a blue coloration. The findings were used to design a colorimetric assay that has a linear response in the 2.5 to 100 μM H2O2 concentration range and a 0.2 μM detection limit. The assay excels by its selectivity, high sensitivity, good selectivity, portability and cost efficiency. Graphical abstractFe3O4-Cu2+ nanoparticles with excellent peroxidase-like activity were successfully prepared via a facile strategy, and then used to design a facile as well as sensitive colorimetric H2O2 sensor. The linear range and the detection limit were 2.5~100 μM and 0.212 μM.

更新日期：2019-07-09

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