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

摘要

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