title: Exploration of CeO₂ nanoparticles as a chemi-sensor and photo-catalyst for environmental applications.
abstract: CeO₂ nanoparticles were synthesized hydrothermally and utilized as redox mediator for the fabrication of efficient ethanol chemi-sensor. The developed chemi-sensor showed an excellent performance for electrocatalytic oxidization of ethanol by exhibiting higher sensitivity (0.92 μA∙cm⁻²∙mM⁻¹) and lower limit of detection (0.124±0.010 mM) with the linear dynamic range of 0.17 mM-0.17 M. CeO₂ nanoparticles have been characterized by field emission scanning electron microscopy (FESEM), Energy dispersive spectroscopy (EDS), X-ray powder diffraction (XRD), Raman spectrum, Fourier transform infrared spectroscopy (FTIR), and UV-visible absorption spectrum which revealed that the synthesized CeO₂ is an aggregated form of optically active spherical nanoparticles with the range of 15-36 nm (average size of ~25±10 nm) and possessing well crystalline cubic phase. Additionally, CeO₂ performed well as a photo-catalyst by degrading amido black and acridine orange.
authors.affiliation: Centre for Advanced Materials and Nano-Engineering (CAMNE) and Department of Chemistry, Faculty of Sciences and Arts, Najran University, P. O. Box 1988, Najran, 11001, Saudi Arabia. drkhanmarwat@gmail.com
authors.forename: Sher Bahadar
authors.initials: SB
authors.lastname: Khan
authors.forename: M
authors.initials: M
authors.lastname: Faisal
authors.forename: Mohammed M
authors.initials: MM
authors.lastname: Rahman
authors.forename: Aslam
authors.initials: A
authors.lastname: Jamal
mesh_terms: D002563:Cerium / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis* / Q000737:chemistry; D053758:Nanoparticles / Q000032:analysis* / Q000737:chemistry / Q000648:ultrastructure; D055668:Photochemical Processes
chemical_list: D004785:Environmental Pollutants; D002563:Cerium; C030583:ceric oxide