Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb₂O₃) nanosheets for environmental safety

Abstract

Herein, we report the construction of a dynamic, highly sensitive, stable, reliable, and reproducible selective ethanol sensor based on a ternary metal oxide system of CdO/ZnO/Yb 2 O 3 nanosheets (NSs). The NSs were synthesized by a hydrothermal process in alkaline phases. The morphological and structural characterization of the synthesized NSs were approved using various advantageous and well-established conventional methods such as Fourier-transform infrared spectroscopy (FTIR), ultraviolet visible spectroscopy (UV/vis), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), and powder X-ray diffraction (XRD). A thin layer of CdO/ZnO/Yb 2 O 3 NSs was deposited onto a glassy carbon electrode (GCE) with conducting binder to produce a working electrode. A calibration plot was obtained and was found to be linear over the ethanol concentration range (linear dynamic range, LDR) from 0.35 nM to 3.5 mM with the detection limit (LoD) of 0.127 AE 0.006 nM and the quantification limit (LoQ) of 0.423 AE 0.02 (signal-to-noise ratio, at the S/N of 3), and the system exhibited a sensitivity of 7.4367 mA mM À1 cm À2

Fabrication of a 3,4‐Diaminotoluene Sensor Based on a TiO2 ‐Al2O3Nanocomposite Synthesized by a Fast and Facile Microwave Irradiation Method

“…It is observed from Figure b that, the electrochemical responses are versed with the corresponding concentration of 3,4‐DAT. These similar observations have been reported earlier . At the beginning of sensing performance of 3,4‐DAT with TiO 2 ‐Al 2 O 3 NCs/binder/GCE electrochemical sensor, a few number of 3,4‐DAT molecules are adsorbed on the surface of TiO 2 ‐Al 2 O 3 NCs/binder/GCE and corresponding oxidation reaction of 3,4‐DAT is in progress.…”

Fabrication of selective and sensitive chemical sensor probe based on ternary nano-formulated CuO/MnO2/Gd2O3 spikes by hydrothermal approach

“…Further increasing of pH, Mn(OH) 2 is also participated out to form aggregation with other two metal hydroxides. The formation of NSs is similar with the previously reported article 31 . The synthesized NSs were characterized in terms of elemental composition, crystallinity, optical property, morphology, structure, and functional properties.…”

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag2O·SrO·CaO

“…As a result, the electron transfer rate as well as the conductivity of the working electrode is increased due to the use of Naon, as described in previous reports. [68][69][70][71][72] During the electrochemical detection of 3-CP in PBS, the 3-CP molecules are adsorbed on the surface of the NPs of the modied GCE and by the inuence of the applied potential, they are oxidized to CO 2 , H + , and free electrons. The generated free electrons trigger the high conductivity of the sensing buffer phase and amplied I-V responses are recorded in the Keithley electrometer.…”