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Microperoxidase-11/metal–organic framework/macroporous carbon for detecting hydrogen peroxide

机译：用于检测过氧化氢的微过氧基酶-11 /金属 - 有机骨架/大孔碳

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In this work, a novel hydrogen peroxide (H _(2) O _(2) ) electrochemical biosensor was developed based on the metal–organic framework (MOF, Tb@mesoMOF) modified three-dimensional (3D) kenaf stem-derived macroporous carbon (3D-KSCs) electrode which was used as a new platform to load microperoxidase-11 (MP-11) for the first time. The chitosan-Au nanoparticles (CHIT-AuNPs) were firstly electrodeposited on the 3D-KSCs integrated electrode, which provided a large number of active sites for the growth of Tb@mesoMOFs to form the Tb@mesoMOFs/CHIT-AuNPs/3D-KSCs integrated electrode. Then the MP-11 molecules were effectively encapsulated in Tb@mesoMOFs of the Tb@mesoMOFs/CHIT-AuNPs/3D-KSCs integrated electrode. Scanning electron microscopy and energy disperse X-ray spectroscopy was used to characterize the resulting electrode. The results showed that a large number of spherical Tb@mesoMOFs grew on the CHIT-AuNPs/3D-KSCs electrode uniformly and firmly. The electrochemical performance of the MP-11/Tb@mesoMOFs/CHIT-AuNPs/3D-KSCs electrode were also explored. The resulting MP-11/Tb@mesoMOFs/CHIT-AuNPs/3D-KSCs integrated electrode showed good performance toward the detection of H _(2) O _(2) with a wide linear range from 3.02 μM to 640 μM and a low detection limit of 0.996 μM. This work provides new ideas to design MOFs/3D-KSCs integrated electrodes for enzyme immobilization to construct electrochemical biosensors.
机译：在这项工作中，基于金属 - 有机框架（MOF，Tb @ Mesomof）改性的三维（3D）keNaf茎衍生的大孔，开发了一种新的过氧化氢（H _（2）O _（2））电化学生物传感器。碳（3D-KSCs）电极用作新平台以首次加载微酮酶-11（MP-11）。首先在3D-kscs集成电电极上首先电沉积壳聚糖-αu纳米颗粒（Chit-auanps），该电极提供了大量的活性位点，用于形成Tb @ mesomofs的生长以形成Tb @ mesomofs / chit-aunps / 3d-kscs集成电极。然后在TB @ Mesomofs / Chit-AuNPS / 3D-KSCS集成电极的Tb @ Mesomofs中有效地包封MP-11分子。扫描电子显微镜和能量分散X射线光谱用于表征所得电极。结果表明，大量球形TB @ Mesomofs均匀且牢固地增长了Chit-AUNPS / 3D-KSCS电极。还探讨了MP-11 / TB / TB的电化学性能/ CHIT-AUNPS / 3D-KSCS电极。得到的MP-11 / TB @ Mesomofs / Chit-AUNP / 3D-KSCS集成电极对检测H _（2）O _（2）的良好性能显示，宽线性范围为3.02μm至640μm和低检出限为0.996μm。这项工作为设计MOFS / 3D-KSCS集成电极提供了新的思路，以构建电化学生物传感器。

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