Fabrication of Novel and Potential Selective 4-Cyanophenol Chemical Sensor Probe Based on Cu-Doped Gd2O3 Nanofiber Materials Modified PEDOT:PSS Polymer Mixtures with Au/µ-Chip for Effective Monitoring of Environmental Contaminants from Various Water Samples

Abstract

Herein, a novel copper-doped gadolinium oxide (Cu-doped Gd2O3; CGO) nanofiber was synthesized by a simple solution method in the basic phase and successfully characterized. We have used Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM) and Energy-Dispersive Spectroscopy (EDS) techniques for characterization of the CGO nanofiber. The CGO nanofiber was used later to modify Au-coated μ-Chips with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) polymer mixtures (coating binder) to selectively detect 4-cyanophenol (4-CP) in an aqueous medium. Notable sensing performance was achieved with excellent sensitivity (2.4214 µAµM−1 cm−2), fast response time (~12 s), wide linear dynamic range (LDR = 1.0 nM–1.0 mM: R2 = 0.9992), ultra-low detection limit (LoD; 1.3 ± 0.1 pM at S/N = 3), limit of quantification (LoQ; 4.33 pM), and excellent reproducibility and repeatability for CGO/Au/μ-Chip sensor. This CGO modified Au/μ-chip was further applied with appropriate quantification and determination results in real environmental sample analyses.

Electrocatalysis of 2,6-Dinitrophenol Based on Wet-Chemically Synthesized PbO-ZnO Microstructures

“…Recently, the nano-metal oxides/hybrid nanocomposites as electrons mediator on sensing working electrode are coming popular to the researchers due to its potential applications as sensors. Applying the fluoresce technique, the novel functional polymer [12], thiazol-substituted pyrazoline nanoparticles [13], and metal-organic frameworks [14] have been used as fluorescent substrates to the development of 2,6-dinitrophenol sensors and exhibited wider detection range with a lower detection limit of 2,6-dinitrophenol reliably, which are appreciable. Besides this, the metal-organic framework [15] and graphene quantum dots [16] have been used as luminescent nanomaterials for the detection of 2,6dinitrophenol.…”

Gadolinium Oxide Nanorods Anchored on g-C3N4 Nanosheets for Dual-Mode Electrochemical Determination of Clioquinol in Real-Time Analysis

“…Gadolinium oxide (GdO) nanoparticles are extremely useful as catalysts, electrical materials, lasers, optical materials, nuclear materials, and phosphors. GdO has prospective uses in biomedicine, magnetic resonance imaging, as a multimodal contrast agent, and in cancer therapy. − Although GdO 1D nanostructures enhance catalytic performance through an electrode–electrolyte interaction, it lacks certain properties like sustainability, stability, ion diffusion, and reproducibility during the electrochemical determining process, which therefore inspired us to develop a robust pathway for tailoring electrocatalysts and fabricate a new nanoarchitecture. ,, …”