MnCo_2O_4@Au纳米纤维类氧化物酶的SERS活性及应用

SERS Activity and Application of Oxidase-Like MnCo_2O_4@Au Nanofibers

近年来MnCo_2O_4材料由于其优异的催化活性和导电性在超级电容器、锂离子电池、CO_2还原燃料电池等方面被广泛应用。MnCo_2O_4表面富含氧化态的Mn^(2+)/Mn^(3+)和Co_^(2+)/Co^(3+)使其成为较好的类氧化物酶基底的电子传输介质^([1])。表面增强拉曼光谱技术是一种超灵敏的分子检测手段,类氧化物酶材料与贵金属复合,可以构筑一种氧化物酶与SERS协同增强活性的基底材料,以SERS技术来研究类氧化物酶催化分子反应的过程^([2])。这里,我们通过MnCo_2O_4与贵金属Au复合,由于MnCo_2O_4和Au纳米粒子之间的协同作用,MnCo_2O_4@Au纳米纤维复合材料比单独MnCo_2O_4和Au展现出更好的SERS活性及很好的类氧化物酶活性,进一步这种材料还可以检测有害的重金属离子。这种MnCo_2O_4@Au纳米类氧化物酶复合材料SERS基底在生物传感器、环境保护和食品安全方面具有广阔的应用前景。

In recent years,MnCo2 O4 materials have been widely studied for their broad applications in supercapacitors,lithium ion batteries,and CO2 reduction fuel cells due to their excellent catalytic activity andconductivity.The surface of MnCo2 O4 is rich in the oxidation state of Mn2+/Mn3+and Co<sup>2+/Co3+,providing it a good electron transfer medium for oxidase-like substrates.Surface enhanced Raman spectroscopy（SERS）technology is an ultra-sensitive molecular detection method.The fabrication of oxidase-like MnCo2 O4@Au nanofibers could synergistically enhances the oxidase activity of the oxides due to the synergistic effect between MnCo2 O4 and Au nanoparticles,which has been used as efficient SERS substrate to study the oxidation process of the oxidase-like catalyticreaction[2].This material can also be used for the detection of harmful heavy metal ions.The oxidase-like MnCo2 O4@Au nanofibers as SERS substrate shows broad prospects in biosensors,environmental protection and food safety.