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The ultra-small cerium oxide nanoparticles (CeO2 NPs) have been synthesized by the hydrothermal process. The structure and morphology of as-prepared nanoparticle were studied by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). The results confirm that the morphology of CeO2 NPs was obtained uniform and spherical structure with the size ranging from approximately 2˗5 nm. The obtained CeO2 NPs was evaluated by the electrochemical sensing of nitrobenzene (NB). In order to, the sensor based on the modified SPCE exhibits good electrocatalytic activity and the sensitivity was about 1.1166 μA μM -1 cm -1 . Remarkably, the CeO2 NPs modified electrode showed the excellent lowest detection limit 0.092 μM over the linear range from 0.1 to 520 μM. Moreover, the ultra-small CeO2 NPs was established good recoveries towards the determine the NB in tap water and river water samples.

A Facile synthesis of ultra-small cerium oxide nanoparticles for enhanced Electrochemical Detection of Nitrobenzene in water samples