Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
Ecotoxicol Environ Saf. 2021 Jan 15;208:111516. doi: 10.1016/j.ecoenv.2020.111516. Epub 2020 Oct 26.
Rapid-monitoring of drugs has attracted tremendous consideration owing to robust global demand for cost-effective and high effectiveness. Binary metal oxides with various morphology have been reported as electrodes for electrochemical sensor to fulfilling the clinical and enviromental requirements. In this study, strontium tungstate (SrWO) nanoflakes have been successfully prepared via the facile sonochemical method for the first time. The characteristics of as-prepared SrWO are systematically measured by various analytical and spectroscopic methods. The SrWO nanoflakes are utilized to modify the electrochemical electrode for the sulfadiazine (SDZ) determination. The SrWO modified electrode possesses excellent electrocatalytic activity and high recognition capability for the electrochemical detection of SDZ. Impressively, the as-fabricated SrWO modified electrode attainted lowest oxidation peak at +0.93 V (vs Ag/AgCl) with the limit of detection of 0.009 μM, the sensitivity of 0.123 µA µM cm and linear detection range of 0.05-235 μM. The enhanced performance of proposed SrWO-based sensors could be attributed to the catalytic effect, large surface area, good electrical conductivity and physicochemical nature. Notably, the electrocatalytic performances of the SDZ sensors are good as compared to the previous literature, indicating the significance of the newly designed SrWO modified electrode. The real-sample diagnosis by the SDZ detection in environmental sample demonstrates the proposed SrWO-based sensors with good recovery range.
由于全球对高性价比和高效性的强烈需求，药物的快速监测引起了极大的关注。具有各种形态的二元金属氧化物已被报道为电化学传感器的电极，以满足临床和环境要求。在本研究中，首次通过简便的超声化学方法成功制备了钨酸锶（SrWO）纳米片。通过各种分析和光谱方法系统地测量了所制备的 SrWO 的特性。将 SrWO 纳米片用于修饰电化学电极以测定磺胺嘧啶（SDZ）。SrWO 修饰电极具有出色的电催化活性和对 SDZ 的电化学检测的高识别能力。令人印象深刻的是，所制备的 SrWO 修饰电极在 +0.93 V（相对于 Ag/AgCl）处获得了最低的氧化峰，检测限为 0.009 μM，灵敏度为 0.123 μA μM cm，线性检测范围为 0.05-235 μM。所提出的基于 SrWO 的传感器的增强性能可归因于催化作用、大表面积、良好的导电性和物理化学性质。值得注意的是，与先前的文献相比，SDZ 传感器的电催化性能较好，表明新设计的 SrWO 修饰电极的重要性。通过环境样品中的 SDZ 检测进行实际样品诊断表明，基于 SrWO 的传感器具有良好的回收率范围。
