期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 18, 页码 9526-9533出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b00884
关键词
Mn2O3; hollow spheres; fabrication; modified electrode; H2O2
资金
- National Natural Science Foundation of China [21405144, 21177090, 21275104, 21175094, 21301163, 91326110]
- Radiochemistry 909 Program in China Academy of Engineering Physics (CAEP)
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.
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