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Article Abstract
Boron-doped CeO (B-CeO) modified electrodes were developed for the sensitive detection of p-nitrophenol (PNP). The CeO and B-CeO nanomaterials were characterized via various techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), and the successful doping of B and the maintenance of the crystal structure of CeO were confirmed. The B-CeO showed an average particle size ranging from 50 to 100 nm. B doping increased the proportion of Ce(III), facilitated faster redox cycling between Ce(III) and Ce(IV), and resulted in the formation of oxygen vacancies (OVs), which served as additional active sites. The B-CeO electrode exhibited high sensitivity with a detection limit of 26 nmol L in the concentration range 0-10 μmol L. Furthermore, B-CeO showed excellent resistance to interference from both organic pollutants and inorganic ions, making it suitable for complex environmental applications. Recovery tests on spiked samples yielded impressive results, with recoveries ranging from 92.67% to 103.25%, demonstrating the sensor's potential for real-world applications. These findings reveal the potential of B-CeO for efficient, practical applications in the electrochemical detection of environmental pollutants and for advancing sensor technologies in environmental monitoring.
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