Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan, ROC.
School of Bio Resources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, 10150, Thailand.
Chemosphere. 2022 Feb;288(Pt 2):132511. doi: 10.1016/j.chemosphere.2021.132511. Epub 2021 Oct 21.
Paraoxon is one of the pesticide that can induce toxicity to nervous system of living organisms. In this work, we focused on synthesizing the catalyst Bismuth Vanadate with the properties that can sense the presence of organophosphorus compounds and characterized them with various characterization methods. The structural studies done by XRD, UV spectroscopy and FTIR spectroscopy. Morphological studies were carried by SEM and TEM. Elemental analysis using XPS spectra. The proposed electrocatalyst was successfully applied as the active electrode material modifying the screen printed carbon electrode for electrochemical sensor applications. The results of the studies indicate that bismuth vanadate modified electrode exhibited four electron transfer process for reduction of nitro group and this lead to the superior electrochemical sensing performance for ethyl Paraoxon with a detection limit of 0.03 μM and good sensitivity 0.345 μA μM cm with excellent reproducibility, repeatability, stability and selectivity over common interferents. Furthermore, the practical application was successfully carried using the proposed modified strips to determine Paraoxon presence in the river water sample with satisfactory results. This proposed catalyst can act as a desirable candidate for the rapid electrochemical sensor.
对硫磷是一种能导致生物神经系统中毒的农药。在这项工作中，我们专注于合成具有感知有机磷化合物存在性能的催化剂 五氧化二铋，并通过各种表征方法对其进行了表征。通过 XRD、紫外光谱和傅里叶变换红外光谱进行结构研究。通过 SEM 和 TEM 进行形态研究。通过 XPS 光谱进行元素分析。所提出的电催化剂成功地用作活性电极材料，用于修饰丝网印刷碳电极，用于电化学传感器应用。研究结果表明，五氧化二铋修饰电极对硝基的还原表现出四电子转移过程，这导致对乙基对氧磷具有优异的电化学传感性能，检测限为 0.03 μM，灵敏度为 0.345 μA μM cm，具有出色的重现性、重复性、稳定性和对常见干扰物的选择性。此外，使用所提出的改性条成功地进行了实际应用，以确定河水中对氧磷的存在，结果令人满意。该催化剂可用作快速电化学传感器的理想候选物。
