Sensitive Hg(II) detection via a glassy carbon electrode modified with Pr-doped high-entropy fluorite oxide nanoparticles

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-10-03 DOI:10.1016/j.colsurfa.2025.138534

Mariappan Anandkumar , Roman Sergeevich Morozov , Gleb Vladimirovich Lychkin , Venkata Ramesh Naganaboina , Olga Vladimirovna Zaitseva , Daria Valerevna Iarushina , Evgeny Alekseevich Trofimov

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Abstract

Heavy metal poisoning, particularly Hg(II), poses severe threats to humans and disrupts ecological balance. Heavy metal detection employing electrochemical methods offers several advantages; however, due to the weak electrochemical activity of the glassy carbon electrode (GCE), modification is indispensable. In the present investigation, the GCE was modified with Pr-doped Ce_0.2Gd_0.2Sm_0.2Y_0.2Zr_0.2O_2-δ (HEO) nanoparticles for the electrochemical detection of Hg(II). Samples with varying dopant concentrations were prepared by solution combustion synthesis utilizing glycine as the fuel. The prepared nanoparticles were used to modify the glassy carbon electrode (GCE), and their electrochemical properties were explored towards Hg(II) sensing. The results indicate that modifying the GCE with Pr-doped HEO nanoparticles improved the electrochemical properties. Additionally, the use of such modified electrode material to detect trace amounts of Hg(II) showed a good linear range between concentrations of 1–5 nM with an limit of detection (LOD) of 0.15 nM. Moreover, the modified electrode material exhibited good reproducibility, stability, and anti-interfering properties. Finally, the use of modified sensors for real-time practical applications such as tap water, soil, coffee, and tea extracts showed consistent results, making them a suitable electrode material.

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用掺pr的高熵氧化萤石纳米粒子修饰的玻碳电极对汞（II）的敏感检测

重金属中毒特别是汞（II）对人类健康造成严重威胁，破坏生态平衡。采用电化学方法检测重金属有几个优点；然而，由于玻璃碳电极的电化学活性较弱，因此必须进行改性。在本研究中，用掺pr的Ce0.2Gd0.2Sm0.2Y0.2Zr0.2O2-δ (HEO)纳米粒子修饰GCE，用于Hg（II）的电化学检测。以甘氨酸为燃料，采用溶液燃烧合成法制备了不同掺杂浓度的样品。将制备的纳米颗粒用于修饰玻碳电极（GCE），并对其在汞（II）传感方面的电化学性能进行了研究。结果表明，用掺pr的HEO纳米颗粒修饰GCE可以改善其电化学性能。此外，使用该修饰电极材料检测痕量Hg（II）的浓度在1-5 nM之间具有良好的线性范围，检测限（LOD）为0.15 nM。此外，改性电极材料具有良好的再现性、稳定性和抗干扰性。最后，将改进后的传感器用于实时实际应用，如自来水、土壤、咖啡和茶提取物，结果一致，使其成为合适的电极材料。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.