Facile Fabrication of Mn2O3 Nanoparticle-Assembled Hierarchical Hollow Spheres and Their Sensing for Hydrogen Peroxide
Facile Fabrication of Mn2O3 Nanoparticle-Assembled Hierarchical Hollow Spheres and Their Sensing for Hydrogen Peroxide
复制标题
Mn2O3 纳米粒子组装的分层空心球的简便制造及其对过氧化氢的传感
DOI：
10.1021/acsami.5b00884
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发表时间：
2015-05-13
影响因子：
9.5
通讯作者：
Xiao, Dan
中科院分区：
文献类型：
--
作者：
Cheng, Changming;Huang, Ying;Xiao, Dan
在目前的工作中，我们描述了 Mn2O3 纳米粒子组装的分层空心球的简便水热制造及其在电化学测定过氧化氢 (H2O2) 中的应用。通过粉末 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM) 和 X 射线光电子能谱 (XPS) 很好地表征了所制备样品的组成和形貌。由于对 H2O2 的电化学反应，提出了一种基于 Mn2O3 空心球修饰玻碳电极的新型非酶电化学传感器，用于测定 H2O2。通过循环伏安法、电化学阻抗谱和计时电流法研究了修饰电极的电化学性能。修饰电极在0.10-1276.5 μM的宽浓度范围内对H2O2表现出明显的电流响应，线性范围为0.10-126.5 μM，检测限为0.07 μM (S/N = 3)。它表现出优异的分析性能，具有长期稳定性、良好的重现性和可接受的抗干扰能力。此外，它还直接应用于实际样品中的 H2O2 测定，具有可接受的精度和回收率，展示了其在常规 H2O2 分析中的潜在应用。
In the present work, we described the facile hydrothermal fabrication of Mn2O3 nanoparticle-assembled hierarchical hollow spheres and their application for the electrochemical determination of hydrogen peroxide (H2O2). The composition and morphology of the as-prepared samples were well characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Because of the electrochemical responses toward H2O2, a novel nonenzymatic electrochemical sensor for the H2O2 determination based on Mn2O3 hollow spheres modified glassy carbon electrode was proposed. The electrochemical properties of the modified electrode were investigated by cyclic voltammetry, electrochemical impedance spectroscopy and chronoamperometry. The modified electrode displayed distinct amperometric response to H2O2 in a wide concentration range 0.10-1276.5 mu M, with a linear range of 0.10-126.5 mu M and a detection limit of 0.07 mu M (S/N = 3). It exhibited excellent analytical performance in terms of long-time stability, good reproducibility and acceptable anti-interference ability. In addition, it was applied for the H2O2 determination in real samples directly with acceptable accuracy and recovery, demonstrating its potential application in routine H2O2 analysis.