Stanković Vesna, Đurđić Slađana, Ognjanović Miloš, Zlatić Gloria, Stanković Dalibor
Institute for Chemistry, Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia.
Faculty of Chemistry, University of Belgrade, 11000 Belgrade, Serbia.
Sensors (Basel). 2024 Jan 22;24(2):705. doi: 10.3390/s24020705.
In this study, we propose an eco-friendly method for synthesizing cerium tungstate nanoparticles using hydrothermal techniques. We used scanning, transmission electron microscopy, and X-ray diffraction to analyze the morphology of the synthesized nanoparticles. The results showed that the synthesized nanoparticles were uniform and highly crystalline, with a particle size of about 50 nm. The electrocatalytic properties of the nanoparticles were then investigated using cyclic voltammetry and electrochemical impedance spectroscopy. We further used the synthesized nanoparticles to develop an electrochemical sensor based on a carbon paste electrode that can detect hydroquinone. By optimizing the differential pulse voltammetric method, a wide linearity range of 0.4 to 45 µM and a low detection limit of 0.06 µM were obtained. The developed sensor also expressed excellent repeatability (RSD up to 3.8%) and reproducibility (RSD below 5%). Interferences had an insignificant impact on the determination of analytes, making it possible to use this method for monitoring hydroquinone concentrations in tap water. This study introduces a new approach to the chemistry of materials and the environment and demonstrates that a careful selection of components can lead to new horizons in analytical chemistry.
在本研究中，我们提出了一种利用水热技术合成钨酸铈纳米颗粒的环保方法。我们使用扫描电子显微镜、透射电子显微镜和X射线衍射来分析合成纳米颗粒的形态。结果表明，合成的纳米颗粒均匀且结晶度高，粒径约为50纳米。然后使用循环伏安法和电化学阻抗谱研究了纳米颗粒的电催化性能。我们进一步使用合成的纳米颗粒开发了一种基于碳糊电极的电化学传感器，该传感器可以检测对苯二酚。通过优化差分脉冲伏安法，获得了0.4至45 μM的宽线性范围和0.06 μM的低检测限。所开发的传感器还表现出优异的重复性（相对标准偏差高达3.8%）和再现性（相对标准偏差低于5%）。干扰对分析物的测定影响不显著，使得该方法可用于监测自来水中对苯二酚的浓度。本研究为材料化学和环境化学引入了一种新方法，并表明仔细选择组分可以为分析化学带来新的前景。
