Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia.
Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 11001, Saudi Arabia.
Biosensors (Basel). 2022 Nov 6;12(11):976. doi: 10.3390/bios12110976.
Herein, an ultra-sonication technique followed by a photoreduction technique was implemented to prepare silver nanoparticle-decorated Chitosan/SrSnO nanocomposites (Ag-decorated Chitosan/SrSnO NCs), and they were successively used as electron-sensing substrates coated on a glassy carbon electrode (GCE) for the development of a 2,6-dinitrophenol (2,6-DNP) efficient electrochemical sensor. The synthesized NCs were characterized in terms of morphology, surface composition, and optical properties using FESEM, TEM, HRTEM, BET, XRD, XPS, FTIR, and UV-vis analysis. Ag-decorated Chitosan/SrSnO NC/GCE fabricated with the conducting binder (PEDOT:PSS) was found to analyze 2,6-DNP in a wide detection range (LDR) of 1.5~13.5 µM by applying the differential pulse voltammetry (DPV) approach. The 2,6-DNP sensor parameters, such as sensitivity (54.032 µA µM cm), limit of detection (LOD; 0.18 ± 0.01 µM), limit of quantification (LOQ; 0.545 µM) reproducibility, and response time, were found excellent and good results. Additionally, various environmental samples were analyzed and obtained reliable analytical results. Thus, it is the simplest way to develop a sensor probe with newly developed nanocomposite materials for analyzing the carcinogenic contaminants from the environmental effluents by electrochemical approach for the safety of environmental and healthcare fields in a broad scale.
在此，采用超声处理技术和光还原技术制备了银纳米颗粒修饰的壳聚糖/锶锡氧化物纳米复合材料（Ag 修饰的壳聚糖/SrSnO NCs），并将其成功用作涂覆在玻碳电极（GCE）上的电子感应基底，用于开发 2,6-二硝基苯酚（2,6-DNP）高效电化学传感器。通过 FESEM、TEM、HRTEM、BET、XRD、XPS、FTIR 和 UV-vis 分析对合成的 NCs 进行形貌、表面组成和光学性质的表征。发现使用导电粘合剂（PEDOT:PSS）制备的 Ag 修饰的壳聚糖/SrSnO NC/GCE 通过应用差分脉冲伏安法（DPV）可以在 1.5~13.5 µM 的宽检测范围（LDR）内分析 2,6-DNP。2,6-DNP 传感器的参数，如灵敏度（54.032 µA µM cm）、检测限（LOD；0.18 ± 0.01 µM）、定量限（LOQ；0.545 µM）重现性和响应时间，都表现出优异和良好的结果。此外，还对各种环境样品进行了分析，并获得了可靠的分析结果。因此，通过电化学方法从环境废水中分析致癌污染物，开发具有新型纳米复合材料的传感器探针是最简单的方法，从而在广泛的范围内保障环境和医疗保健领域的安全。
