Prabhu Keerthi, Malode Shweta J, Shetti Nagaraj P, Pandiaraj Saravanan, Alodhayb Abdullah, Muthuramamoorthy Muthumareeswaran
Department of Chemistry, K.L.E. Institute of Technology, Hubballi, 580027, Karnataka, India.
Center for Energy and Environment, School of Advanced Sciences, KLE Technological University, Vidyanagar, Hubballi, 580031, Karnataka, India.
Environ Res. 2023 Nov 1;236(Pt 1):116710. doi: 10.1016/j.envres.2023.116710. Epub 2023 Jul 20.
The abstract highlights the development of an electroanalytical sensor for the detection of 2-phenylphenol (2-PPL) as a contaminant. The novelty of the experiment lies in the utilization of a 1-D nanostructured WO/CuO nanocomposite integrated with a carbon paste electrode (CPE). The hydrothermal method was used to synthesize the WO NPs, which were then characterized using Scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS) techniques. Tungsten oxides (WO) have been the subject of extensive study because of their many desirable characteristics, including their ease of preparation, tunable stoichiometry, crystal structure, particle morphology, 2.6 eV bandgap, excellent photocatalytic oxidation capacity, non-toxic nature, and widespread availability. The narrow band gap in CuO makes it an ideal sensing material. Copper oxide has applications in many different industries because it is a semiconductor metal with a narrow band gap in the spectrum of 1.2-1.9 eV and unique optical, electrical, and magnetic properties. Techniques like cyclic voltammetry (CV), and square wave voltammetry (SWV) were used. Real sample analysis was carried out in real-world samples like different types of soil, vegetables, and water. The electroanalytical sensor showed outstanding catalytic behavior by enhancing the peak current of the 2-phenylphenol with the potential shift to the less positive side compared to the unmodified carbon paste electrode in the presence of pH 7.0 phosphate buffer solution (PB). Throughout the experimental study, double distilled was used. Various electro-kinetic parameters like pH, accumulation time study, scan rate, concentration variation, standard heterogeneous rate constant, and participation of electrons, accumulation time, and transfer coefficient have been studied at WO/CuO/CPE. The limit of detection was quantified together with the limit of quantification. Possible electrochemical oxidation mechanism of the toxic molecule was depicted. Overall, this research contributes to the field of electroanalytical sensing and offers potential applications in environmental monitoring.
摘要重点介绍了一种用于检测作为污染物的2-苯基苯酚（2-PPL）的电分析传感器的开发。该实验的新颖之处在于利用了与碳糊电极（CPE）集成的一维纳米结构WO/CuO纳米复合材料。采用水热法合成WO纳米颗粒，然后使用扫描电子显微镜（SEM）和能量色散X射线光谱（EDS）技术对其进行表征。氧化钨（WO）因其许多理想特性而成为广泛研究的对象，这些特性包括易于制备、可调节的化学计量比、晶体结构、颗粒形态、2.6 eV的带隙、优异的光催化氧化能力、无毒性质以及广泛的可用性。CuO中的窄带隙使其成为理想的传感材料。氧化铜是一种半导体金属，在光谱中具有1.2 - 1.9 eV的窄带隙以及独特的光学、电学和磁学性质，因此在许多不同行业都有应用。使用了循环伏安法（CV）和方波伏安法（SWV）等技术。在不同类型的土壤、蔬菜和水等实际样品中进行了实际样品分析。在pH 7.0磷酸盐缓冲溶液（PB）存在的情况下，与未修饰的碳糊电极相比，该电分析传感器通过将2-苯基苯酚的峰值电流增强并使电位向较不正值的一侧移动，表现出出色的催化行为。在整个实验研究中使用的是双蒸水。在WO/CuO/CPE上研究了各种电动参数，如pH、积累时间研究、扫描速率、浓度变化、标准异质速率常数以及电子参与、积累时间和转移系数。对检测限和定量限进行了量化。描绘了有毒分子可能的电化学氧化机制。总体而言，这项研究为电分析传感领域做出了贡献，并在环境监测中提供了潜在应用。
