MIL-68衍生的六方锥形In@CN用于高灵敏检测过氧化氢

MIL-68(In)-Derived Hexagonal Structure In@CN for Highly Detection of Hydrogen Peroxide

摘要: 过氧化氢(H₂O₂)的检测在医学，环境等领域有着重要作用。然而，目前其常用的检测方法具有操作复杂，成本昂贵和灵敏度低等缺点，无法满足人们的需求。随着科学技术的进步，电化学法因具备检测限低、灵敏度高等特点被广泛运用于小分子的检测。基于此，我们利用金属有机框架In-MIL-68(MOFs)的热解策略制备出In@CN材料，将其用于高灵敏性检测H₂O₂的电化学传感器中。通过循环伏安法(CV)，电化学阻抗谱(EIS)，计时库伦曲线(Q-t)和安培时间电流曲线(i-t)等电化学方法探究该电化学传感器的检测性能。此外，我们还通过扫描电子显微镜(SEM)对该材料(In@CN)进行物理表征，确定其表面形貌。通过X射线衍射仪(XRD)确定其元素组成。实验结果表明：In@CN参与构建的电化学传感器即In@CN/GCE相较于In₂O₃/GCE在检测H₂O₂方面具有更高的灵敏度和更好的导电性，对H₂O₂的电化学检测具有更强的响应信号。此外，实验结果也表明该传感器具有良好的抗干扰性与稳定性。本文为新型催化剂构建H₂O₂的电化学传感器提供了一定的参考价值。

Abstract: Developing an effective method for detecting hydrogen peroxide (H₂O₂) plays an important role in medicine, environment and other fields. However, the commonly detection platforms have the disadvantages of complex operation, high cost and low sensitivity. With the progress of science and technology, electrochemical methods due to the low detection limit and high sensitivity have been widely used in the detection of small molecules. In this work, the hexagonal structure In@CN was successfully fabricated by pyrolysis strategy from metal-organic frameworks In-MIL-68 (MOFs). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to investigate the morphology and compositions and phase. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), chronometric coulomb curve (Q-t) and ampere time current curve(i-t) were used to investigate the electrochemical responses. The results showed that the electrochemical sensor In@CN/GCE has higher sensitivity and better conductivity than In₂O₃/GCE. In addition, the In@CN/GCE also shows a good anti-interference and stability. This work provides a certain reference value for the construction of electrochemical sensors for the detection of H₂O₂.