Manganese oxides/carbon nanowall nanocomposite electrode as an efficient non-enzymatic electrochemical sensor for hydrogen peroxide

Fatemeh Bohlooli; Ayumu Yamatogi; Shinsuke Mori

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Manganese oxides/carbon nanowall nanocomposite electrode as an efficient non-enzymatic electrochemical sensor for hydrogen peroxide

机译：锰氧化物/碳纳米瓦尔纳米复合电极作为过氧化氢的有效的非酶促电化学传感器

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Plasma-enhanced chemical vapor deposition in a CO/H 2 microwave discharge system was performed for synthesizing of carbon nanowalls template and subsequently potentiostatic anodic deposition technique was applied for depositing of manganese oxides onto the carbon nanowall surfaces. Characterization of the synthesized nanocomposite films was done via scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The electrochemical properties of MnO x /CNW electrode were investigated by cyclic voltammetry and amperometry techniques. The prepared nanocomposite electrode exhibited high electrochemical activity for the detection of hydrogen peroxide (H 2 O 2 ) in phosphate buffer solution at an applied potential of 0.7?V, showing a linear dependence on the concentration of H 2 O 2 from 40?μM to 10,230?μM, a high sensitivity (698.6?μA?mM ?1 ?cm ?2 ), and a detection limit of 0.55?μM (signal/noise?=?3). The sensor exhibited good selectivity toward hydrogen peroxide detection against ascorbic acid, uric acid, and citric acid. This study demonstrates a great potential of CNW based composite electrodes in nonenzymatic electrochemical sensor application.

机译：对CO / H 2微波排出系统中的等离子体增强的化学气相沉积用于合成碳纳米瓦尔模板，随后施用电位阳极阳极沉积技术，用于将锰氧化物沉积到碳纳米瓦尔表面上。通过扫描电子显微镜（SEM）和X射线光电子谱（XPS）进行合成纳米复合膜的表征。通过循环伏安法和电流测量技术研究了MNO X / CNW电极的电化学性质。制备的纳米复合电极表现出高电化学活性，用于检测磷酸盐缓冲溶液中的磷酸盐缓冲溶液的过氧化氢（H 2 O 2），其施加电位为0.7≤v，显示对40Ωμm的H 2 O 2浓度的线性依赖性10,230？μm，灵敏度高（698.6？μaΩ·mm？1？cm？2），检出限为0.55≤μm（信号/噪音？=？3）。传感器对抗坏血酸，尿酸和柠檬酸的过氧化氢检测表现出良好的选择性。该研究表明了非酶电化学传感器应用中基于CNW的复合电极的巨大潜力。

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《Sensing and Bio-Sensing Research》 |2021年第a期|共9页
作者
Fatemeh Bohlooli; Ayumu Yamatogi; Shinsuke Mori;
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Carbon nanowallsManganese oxidesCyclic voltammetryAmperometryHydrogen peroxide;

机译：碳纳米瓦尔曼曼喃喃铵氧化伏安rametryamperry-氢化氢过氧化物;

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Manganese oxides/carbon nanowall nanocomposite electrode as an efficient non-enzymatic electrochemical sensor for hydrogen peroxide

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