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Hexagonal cerium oxide decorated on β‑Ni(OH)2 nanosheets stabilized by reduced graphene oxide for effective sensing of H2O2 KCI 등재
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/420758
Cerium oxide decorated on nickel hydroxide anchored on reduced graphene oxide (Ce-Ni(OH)2/rGO) composite with hexagonal structures were synthesized by facile hydrothermal method. Fourier transform infrared spectroscopy (FT-IR), highresolution transmission electron microscopy with selected area diffraction (HRTEM-SAED), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer– Emmett–Teller (BET) surface area analysis and electrochemical technology were used to characterize the composite. Due to its unique two-dimensional structures and synergistic effect among Ce2O3, Ni(OH)2 and rGO components indicated twodimensional hexagonal nano Ce-Ni(OH)2/rGO composite is promising electrode material for improved electrochemical H2O2 sensing application. From 50 to 800 μM, the H2O2 concentration was linearly proportional to the oxidation current, with a lower detection of limit of 10.5 μM (S/N = 3). The sensor has a higher sensitivity of 0.625 μA μM−1 cm− 2. In addition, the sensor demonstrated high selectivity, repeatability and stability. These findings proved the viability of the synthetic method and the potential of the composites as a H2O2 sensing option.
1 Introduction
2 Experimental section
2.1 Chemicals and reagents
2.2 Synthesis of Ce-Ni(OH)2 nanocomposite
2.3 Graphene oxide synthesis by Modified Hummer’s method
2.4 Anchoring of Ce-Ni(OH)2 on rGO
2.5 Characterization
2.6 Electrochemical experiments
2.7 Fabrication of the working electrode
3 Results and discussion
3.1 Characterization of Ce-Ni(OH)2rGO nanocomposite
3.2 Electrochemical characteristics of Ce-Ni(OH)2rGO nanocomposite
4 Conclusions
Acknowledgements
References
