Preparation and Characterization of Fe2O3 Nanoparticles by Solid-Phase Method and Its Hydrogen Peroxide Sensing Properties

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• 作者：Chen Hao ; Yuru Shen ; Zhiyuan Wang ; Xiaohong Wang ; Feng Feng ; Cunwang Ge ; Yutao Zhao ; Kun Wang
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：March 7, 2016
• 年：2016
• 卷：4
• 期：3
• 页码：1069-1077
• 全文大小：627K
• ISSN：2168-0485

文摘

Modified Fe₂O₃ nanoparticles were obtained by a conventional solid-phase method with different additions of sodium lignosulfonate (SLS) and calcining temperatures. The microstructures and morphologies of the synthesized Fe₂O₃ samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric/differential scanning calorimetry (TG/DSC) analysis, Fourier transform infrared spectroscopy (FT-IR) and surface area and porosity analyzer (BET). The results indicate that the fine Fe₂O₃ particles with uniform morphology were gained (1.0 g SLS, calcined 400 °C). Then, the as-prepared Fe₂O₃ nanoparticle, along with graphene (G), was immobilized on the surface of glassy carbon electrode (GCE) by a bridge constituted of chitosan (CS) for further electrochemical measurement of cyclic voltammetry and chronoamperometry. The prepared G-Fe₂O₃-CS/GCE with the above-mentioned fine Fe₂O₃ particles (1.0 g SLS, calcined 400 °C) displayed high sensitivity (84.32 μA mM^–1 cm^–2), wide detection range (0.001–6.0 mM) and low detection limit (1.1 μM) when applied to the electrochemical sensing of hydrogen peroxide. Moreover, the sensor was also confirmed to exhibit good anti-interference for ascorbic acid and uric acid, excellent repeatability, and long-term stability.