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Mohammed M. Rahman,Jahir Ahmed,Abdullah M. Asiri,Sulaiman Y. Alfaifi 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
Herein, a novel composite material (Magnesium co-doped Tin (IV) oxide; MTO) microcube was synthesizedby a simple solution method in basic phase and successfully characterized. It has been used theFourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), X-rayDiffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), and Energy-DispersiveSpectroscopy (EDS) techniques for the characterization of MTO. The MTO microcube was used later tomodify gold-coated l-chips to detect unsafe toxin, bisphenol A (BPA) in aqueous medium. Notable sensingperformance was achieved with excellent sensitivity (1.63 mAmM1cm2), fast response time (11 s),wide linear dynamic range (LDR = 0.10 nM – 1.0 mM: R2 = 0.9997), ultra-low detection limit (2.7 ± 0.1 pMat S/N = 3) and excellent reproducibility and repeatability for the MTO/Au/l-Chip sensor. This MTO fabricatedgold-coated l-chip was further applied with appropriate quantification and determination resultsin real environmental sample analyses.
M. Faisal,M.M. Alam,Jahir Ahmed,Abdullah M. Asiri,S.A. Alsareii,Raja Saad Alruwais,Norah Faihan Alqahtani,Mohammed M. Rahman,Farid A. Harraz 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-
Herein, a facile L-lactic acid electrochemical sensor based on Pt-nanoparticles (NPs)@Chitosan/ZnTiO3nanocomposites (NCs) coated on a glassy carbon electrode (GCE) is demonstrated. Ultra-sonicationmethod followed by irradiation using an Osram Hg-lamp was applied to prepare Pt-NPs@Chitosan/ZnTiO3 NCs, and the characterization of prepared NCs was executed by Field Emission ScanningElectron Microscopy FESEM, Energy Dispersive Spectroscopy EDS, Transmission Electron MicroscopyTEM, High Resolution Transmission Electron Microscopy HRTEM, Fourier Transform InfraredSpectroscopy FTIR, Ultraviolet–visible spectroscopy UV–vis., and X ray Diffraction XRD analysis. A linearcurrent versus potential responses relation was obtained in a concentration range of L-lactic acid of 0. 30 2.40 mM at differential pulse voltammetric (DPV) analysis in a pH 7.0 buffer medium and resultedconcentration range was defined as the dynamic detection range (LDR) for L-lactic acid analysis. The Llacticacid sensor sensitivity (0.4529 lAlM-1cm2), limit of detection (LOD; 22.36 ± 1.12 lM), and limitof quantification (LOQ; 79.88 lM) were obtained. Besides this, the sensor reproducibility and responsetime were found to be reliable. Finally, the assembled sensor probe was validated by the testing of realsamples, which exhibited acceptable and satisfied results. It is introduced a new route for the detection ofchemicals using novel nanocomposite materials by electrochemical approach for the safety of healthcarefields in a broad scales.