Fenniche Fares, Khane Yasmina, Aouf Djaber, Albukhaty Salim, Nouasria Fatima Zohra, Chouireb Makhlouf, Harfouche Nesrine, Henni Abdellah, Sulaiman Ghassan M, Jabir Majid S, Mohammed Hamdoon A, Abomughaid Mosleh M
Materials, Energy Systems Technology and Environment Laboratory, Faculty of Sciences and Technology, University of Ghardaia, 47000, Ghardaia, Algeria.
Department of Process Engineering, Faculty of Sciences and Technology, University of Ghardaïa, BP 455, 47000, Ghardaïa, Algeria.
Sci Rep. 2024 Nov 2;14(1):26408. doi: 10.1038/s41598-024-77252-6.
This work reports the electrochemical fabrication of thin films comprising polyaniline nanofibers (PANI) in conjunction with graphene oxide (GO) and reduced graphene oxide (rGO) on ITO substrate, along with examining the electrochemical properties, with a focus on the influence of the substrate and electrolyte in the electrodeposition methods. The study explores the electrochemical characteristics of these thin films and establishes a flexible framework for their application in diverse sectors such as sensors, supercapacitors, and electronic devices. It analyzes the impact of the substrate and electrolyte in electrodeposition techniques. The effects were studied using techniques such as cyclic voltammetry and chronoamperometry. The fabrication process of PANI/GO and PANI/rGO thin films involved the integration of rGO within PANI via electropolymerization, conducted under sulfuric acid. GO was synthesized by modifying the well-known Hummers' method and characterized by X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). SEM showed the diameters of the formed PANI were between 40 and 150 nm, which helped to intertwine the rGO nanosheets with PANI nanofibers to form thin films. The electrochemical behavior of the PANI/rGO thin films was examined using cyclic voltammetry (CV) and chronoamperometry in different electrolytes, including sulfuric acid (H₂SO₄) and potassium nitrate (KNO₃). The CV profiles exhibited distinct oxidation and reduction peaks, with variations in the voltammogram morphology attributed to the nature of the electrolyte and the substrate employed during the electrodeposition process. These results highlight the critical role of both the substrate and electrolyte in governing the electrochemical performance of PANI/rGO thin films. The findings from this study demonstrate a versatile approach for the fabrication of PANI/graphene-based thin films with tunable electrochemical properties, and such a strategy has great application to fabricating other thin film composites for supercapacitors or other control source frameworks requiring enhanced charge storage and electrochemical responsiveness.
这项工作报道了在ITO衬底上电化学制备包含聚苯胺纳米纤维（PANI）与氧化石墨烯（GO）和还原氧化石墨烯（rGO）的薄膜，并研究其电化学性质，重点关注电沉积方法中衬底和电解质的影响。该研究探索了这些薄膜的电化学特性，并为其在传感器、超级电容器和电子设备等不同领域的应用建立了一个灵活的框架。分析了衬底和电解质在电沉积技术中的影响。使用循环伏安法和计时电流法等技术研究了这些影响。PANI/GO和PANI/rGO薄膜的制备过程涉及通过在硫酸中进行电聚合将rGO整合到PANI中。GO通过改进著名的Hummers法合成，并通过X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）进行表征。扫描电子显微镜（SEM）显示所形成的PANI的直径在40至150纳米之间，这有助于使rGO纳米片与PANI纳米纤维交织形成薄膜。在不同电解质（包括硫酸（H₂SO₄）和硝酸钾（KNO₃））中使用循环伏安法（CV）和计时电流法研究了PANI/rGO薄膜的电化学行为。CV曲线呈现出明显的氧化和还原峰，伏安图形态的变化归因于电沉积过程中使用的电解质和衬底的性质。这些结果突出了衬底和电解质在控制PANI/rGO薄膜电化学性能方面的关键作用。这项研究的结果展示了一种制备具有可调电化学性质的PANI/石墨烯基薄膜的通用方法，并且这种策略在制备用于超级电容器或其他需要增强电荷存储和电化学响应性的控制源框架的其他薄膜复合材料方面具有很大的应用价值。
