Journal of Chromatography & Separation Techniques
Open Access
ISSN: 2157-7064
ISSN: 2157-7064
Sher Bahadar Khan
Posters: J Chromat Separation Techniq
C erium oxide (CeO 2 1) nanoparticles (NP) have been synthesized hydrothermally in the presence of surfactant (urea) and studied the effect of surfactant on the particle size and ultimately on the chemical sensing and photo-catalytic properties of CeO 2 . CeO 2 1 was 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 product is well crystalline cubic phase optically active nanoparticles. SEM images of CeO 2 1 showed that the synthesized product is composed of cumulative form of highly crytallinity spherical shape nanoparticles with an average diameter of ~ 12 � 10 nm. Additionally, CeO 2 1 was utilized as redox mediator for the fabrication of ethanol chemi-sensor. The developed chemi-sensor showed an excellent performance for electrocatalytic oxidization of ethanol by exhibiting higher sensitivity (1.192 μA.cm -2 .M -1 ) and lower limit of detection (9.7 μM) with the linear dynamic range of 17.0 μM ~ 1.7 M. Moreover, by applying to organic pollutant, CeO 2 1 degraded almost 50% of acridine orange in short time. By comparing with 2, CeO 2 1 showed lower particle size, lower limit of detection and higher sensitivity toward ethanol sensing and high photo-catalytic activity for degradation of acridine orange. It is concluded that reduction in the particle size enhances the active surface area of the CeO 2 which results in increase of chemical sensing and photo-catalytic properties of CeO2