Browsing by Author "Rafiaa Kihal"

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    A novel and ultrasensitive non‑enzymatic electrochemical glucose sensor in real human blood samples based on facile one‑step electrochemical synthesis of nickel hydroxides nanoparticles onto a three‑dimensional Inconel 625 foam
    (Journal of Applied Electrochemistry, 2023) Rafiaa Kihal; Hassina Fisli; Mohamed Lyamine Chelaghmia; Widad Drissi; Chahira Boukharouba; Sara Abdi; Mouna Nacef; Abed Mohamed Afoune; Maxime Pontié
    In this contribution, a simple and novel non-enzymatic electrochemical sensor for the detection of glucose was successfully prepared by direct in situ growth of nickel hydroxide nanoparticles (Ni(OH)2NPs) onto a three-dimensional Inconel 625foam (IN625F) substrate through a facile electrochemical route, using cyclic voltammetry (CV) method in alkaline medium without addition of nickel salts. Then, surface characterization of modifed Ni(OH)2/IN625F electrodes was carried out through advanced technologies, such as scanning electron microscopy (SEM) and X-ray difraction (XRD). The electrochemical catalytic behavior of the fabricated electrodes was investigated using CV and amperometric methods. The results revealed that the novel modifed sensor, Ni(OH)2/IN625F, showed the highest sensitivity of 5685 μAmM−1 cm−2 over a wide linear concentration range from 1 to10 mM, with lowest detection limit (LOD) of 2 μM (S/N = 3), and short response time within<2 s. Therefore, the proposed non-enzymatic electrochemical sensor demonstrated high selectivity and stability, good reproducibility, and low cost. In addition, analysis of human blood samples was performed. Hence, the constructed glucose sensor, Ni(OH)2/IN625F, with suitable performance could be used as a promising material in real human blood samples.
  • No Thumbnail Available
    Item
    Dendritic Cu(OH)2 nanostructures decorated pencil graphite electrode as a highly sensitive and selective impedimetric non‑enzymatic glucose sensor in real human serum blood samples
    (Monatshefte für Chemie - Chemical Monthly, 2022) Chahira Boukharouba; Mouna Nacef; Mohamed Lyamine Chelaghmia; Rafiaa Kihal; Widad Drissi; Hassina Fisli; Abed Mohamed Afoune; Maxime Pontié
    In this study, an efective and low price non-enzymatic electrochemical glucose sensor was easily elaborated through electrodeposition of highly uniform copper dendrites hydroxide onto pencil graphite electrode (Cu(OH)2/PGE). The obtained electrode was investigated by feld-emission scanning electron microscopy, atomic force microscopy, energy-dispersive X-ray spectroscopy, X-ray difraction, and FT-IR characterizations. The electrocatalytic properties of the modifed electrode were investigated by cyclic voltammetry, amperometry, and electrochemical impedance spectroscopy techniques, which can be readily applied to determine glucose using the fabricated sensor, as the results after optimization revealed. Furthermore, a single frequency impedance method was applied for glucose determination as an alternative to conventional EIS methods. The fabricated Cu(OH)2/PGE electrode exhibited a selective impedimetric response towards glucose over an exceptional linear range from 0.1 to 12 mM (R2 = 0.999) with a detection limit of 71.8 µM. Finally, Cu(OH)2/PGE was successfully applied to the assay of glucose in blood samples with unknown interferences.
  • No Thumbnail Available
    Item
    Electrodeposition of SnS Thin film Solar Cells in the Presence of Sodium Citrate
    (J. Electrochem. Sci. Technol., 2017, 8(3), 206-214, 2017) Rafiaa Kihal; Hassiba Rahal; Abed Mohamed Affoune; Mokhtar Ghers
    SnS films have been prepared by electrodeposition technique onto Cu and ITO substrates using acidic solutions containing tin chloride and sodium thiosulfate with sodium citrate as an additive. The effects of sodium citrate on the electrochemical behavior of electrolyte bath containing tin chloride and sodium thiosulfate were investigated by cyclic voltammetry and chronoamperometry techniques. Deposited films were characterized by XRD, FTIR, SEM, optical, photoelectrochemical, and electrical measurements. XRD data showed that deposited SnS with sodium citrate on both substrates were polycrystalline with orthorhombic structures and preferential orientations along (111) directions. However, SnS films with sodium citrate on Cu substrate exhibited a good crystalline structure if compared with that deposited on ITO substrates. FTIR results confirmed the presence of SnS films at peaks 1384 and 560 cm-1. SEM images revealed that SnS with sodium citrate on Cu substrate are well covered with a smooth and uniform surface morphology than deposited on ITO substrate. The direct band gap of the films is about 1.3 eV. p-type semiconductor conduction of SnS was confirmed by photoelectrochemical and Hall Effect measurements. Electrical properties of SnS films showed a low electrical resistivity of 30 Ω cm, carrier concentration of 2.6 × 1015 cm-3 and mobility of 80 cm2 V-1 s-1.
  • No Thumbnail Available
    Item
    In Situ Growth of Ni(OH)2 Nanoparticles on 316L Stainless Steel Foam: An Efficient Three-dimensional Nonenzymatic Glucose Electrochemical Sensor in Real Human Blood Serum Samples
    (Electroanalysis, 2022) Widad Drissi; Mohamed Lyamine Chelaghmia; Mouna Nacef; Abed Mohamed Affoune; Hamid Satha; Rafiaa Kihal
    For the first time, nickel hydroxide nanoparticles (Ni(OH)2 NPs) grown on 316L stainless steel foam were used as a non-enzymatic electrochemical glucose sensor. The Ni(OH)2/SSF-316L was elaborated by applying a simple ultrafast CV method without nickel salts addition. Ni(OH)2/SSF-316L was characterized by SEM and XRD. The electrochemical behavior was investigated by CV, EIS, and amperometric measurements. The fabricated sensor revealed higher sensitivity 1062 μA mM 1cm 2, wide linear range from 1.0 μM to 4.0 mM with a low detection limit of 2.0 μM and good selectivity. In addition, real sample analysis was performed for controlled glucose in real blood serum.