Li Hao-Ran, Xu Huan, Zheng Zi-Yi, Li Guan-Hua, You Zhi-Yong, Li Shan-Shan
Anhui Province Industrial Generic Technology Research Center for Alumics Materials, Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, School of Physics and Electronic Information, Huaibei Normal University, Huaibei, 235000, People's Republic of China.
Mikrochim Acta. 2025 Aug 20;192(9):608. doi: 10.1007/s00604-025-07486-2.
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.
硼掺杂的CeO（B-CeO）修饰电极被开发用于对硝基苯酚（PNP）的灵敏检测。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）等多种技术对CeO和B-CeO纳米材料进行了表征，并证实了B的成功掺杂以及CeO晶体结构的维持。B-CeO的平均粒径在50至100纳米之间。B掺杂增加了Ce(III)的比例，促进了Ce(III)和Ce(IV)之间更快的氧化还原循环，并导致形成氧空位（OVs），这些氧空位充当了额外的活性位点。B-CeO电极在0至10 μmol L的浓度范围内表现出高灵敏度，检测限为26 nmol L。此外，B-CeO对有机污染物和无机离子的干扰均表现出优异的抗性，使其适用于复杂的环境应用。对加标样品的回收率测试取得了令人印象深刻的结果，回收率在92.67%至103.25%之间，证明了该传感器在实际应用中的潜力。这些发现揭示了B-CeO在环境污染物电化学检测中的高效、实际应用潜力，以及在环境监测中推动传感器技术发展的潜力。
