Center of Excellence for Research in Engineering Materials (CEREM), King Saud University, Riyadh 11421, Saudi Arabia.
Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet 3100, Bangladesh.
Talanta. 2019 Feb 1;193:64-69. doi: 10.1016/j.talanta.2018.09.100. Epub 2018 Sep 27.
In this study, conducting polyaniline (PAni) and silicon dioxide (SiO) nanocomposites (NCs) were synthesized for chemical sensing applications by microwave assisted reaction technique. Facile synthesis and characterization of the PAni-SiO nanocomposites were investigated in details and discussed in this report. For the potential application, 1,4-dioxane chemical sensor was fabricated with the PAni-SiO nanocomposites deposited onto glassy carbon electrode (GCE). A very thin uniform film was deposited onto GCE with nanocomposite by using conducting 5% nafion binder at room conditions. To evaluate the sensor analytical performances, a calibration plot such as current versus concentration of 1,4-dioxane was drawn and calculated the analytical parameters from the slope of calibration curve. Results are found as sensitivity (0.5934 µAµmol1 L cm), detection limit (16.0 ± 0.8 pmol L), and quantification limit (LOQ; 53.3 ± 1.5 pmol L) in this observation. Considering the linear region in calibration plot, the linear dynamic range of 1,4-dioxane chemical sensor was found (0.12 nmol L ∼ 1.2 mmol L). Besides this, the proposed 1,4-dioxane chemical sensor was exhibited good reproducibility, long-term stability, high accuracy in detecting of 1,4-dioxane in real environmental samples. This research is to develop of a selective and an efficient electrochemical sensor. It might be a simple and easy way by applying electrochemical method to ensure the safe and sustainable green environment.
在这项研究中，通过微波辅助反应技术合成了聚苯胺（PAni）和二氧化硅（SiO）纳米复合材料（NCs），用于化学传感应用。本报告详细研究并讨论了 PAni-SiO 纳米复合材料的简便合成和表征。为了潜在的应用，将 PAni-SiO 纳米复合材料沉积在玻碳电极（GCE）上制备了 1,4-二恶烷化学传感器。通过在室温条件下使用导电 5% nafion 粘合剂将纳米复合材料涂覆到 GCE 上，可以沉积非常薄且均匀的薄膜。为了评估传感器的分析性能，绘制了电流与 1,4-二恶烷浓度的校准曲线，并从校准曲线的斜率计算分析参数。在观察中，得到了灵敏度（0.5934 µAµmol1 L cm）、检测限（16.0 ± 0.8 pmol L）和定量限（LOQ；53.3 ± 1.5 pmol L）。考虑到校准曲线的线性区域，发现了 1,4-二恶烷化学传感器的线性动态范围（0.12 nmol L ～ 1.2 mmol L）。此外，所提出的 1,4-二恶烷化学传感器表现出良好的重现性、长期稳定性和对实际环境样品中 1,4-二恶烷的高检测精度。这项研究旨在开发一种选择性和高效的电化学传感器。通过应用电化学方法来确保安全和可持续的绿色环境可能是一种简单易行的方法。
