Metal tungstates are considered efficient electrocatalysts in the area of electrochemical sensors. Herein, we prepared an alkaline-earth-metal-based transition metal tungstate (SrWO₄) through a simple co-precipitation method. Further, to enhance the electrocatalytic activity, commercially available boron nitride (BN) was used to prepare a SrWO₄/BN composite via an ultrasonication method. The as-prepared SrWO₄/BN composite was scrutinized using XRD, FTIR, FE-SEM, EDS, elemental mapping, and HR-TEM analysis for determining the phase purity, functional groups, and structural morphology of the as-prepared composite. The electrochemical performance of the SrWO₄/BN composite was analyzed with the help of cyclic voltammetry and linear sweep voltammetry techniques using a three-electrode system. As-modified SrWO₄/BN with a glassy carbon electrode (SrWO₄/BN/GCE) exhibits better electrochemical activity towards the reduction of ornidazole (OD), with a lower cathodic peak potential (E_pc = −0.62 V) and an increased cathodic current (I_pc = −21.3 μA) compared to other modified electrodes for the detection of OD, and a larger linear range (0.01–437 μM) and lower limit of detection (0.003 μM). Further, interference studies were carried out in the presence of hazardous metal anions and cations, some biological compounds, and similar structural compounds to examine the selectivity of the proposed sensor; SrWO₄/BN/GCE reveals good selectivity. In addition, the practical feasibility of the sensor was inspected using commercial OD tablet and lake water samples, disclosing the acceptable recovery properties of the sensor in the presence of real samples. From all the obtained results, the proposed sensor utilizing the SrWO₄/BN/GCE composite prepared via an ultrasonication technique is shown to be an appropriate candidate for the detection of OD.

中文翻译：

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锚固在氮化硼（SrWO4 / BN）复合材料上的钨酸锶的轻松共沉淀合成，可作为有望用于药物分析的电催化剂

金属钨酸盐在电化学传感器领域被认为是有效的电催化剂。在这里，我们通过简单的共沉淀方法制备了一种基于碱土金属的过渡金属钨酸盐（SrWO ₄）。此外，为了增强电催化活性，使用市售的氮化硼（BN）通过超声法制备SrWO ₄ / BN复合材料。使用XRD，FTIR，FE-SEM，EDS，元素图谱和HR-TEM分析检查制备的SrWO ₄ / BN复合材料，以确定制备的复合物的相纯度，官能团和结构形态。SrWO ₄的电化学性能借助循环伏安法和线性扫描伏安法，使用三电极系统对/ BN复合材料进行了分析。带有玻璃碳电极的改性SrWO ₄ / BN（SrWO ₄ / BN / GCE）对降低奥硝唑（OD）表现出更好的电化学活性，具有较低的阴极峰电位（E _pc = -0.62 V）和较高的阴极电流（I _pcOD = -21.3μA），而其他修饰电极可检测OD，线性范围较大（0.01–437μM），检测下限（0.003μM）。此外，在有害金属阴离子和阳离子，一些生物化合物和类似结构化合物的存在下进行了干扰研究，以检验所提出传感器的选择性。SrWO ₄ / BN / GCE具有良好的选择性。此外，使用市售OD片和湖水样品检查了传感器的实际可行性，公开了在存在真实样品的情况下传感器的可接受的恢复特性。从所有获得的结果中，拟议的传感器利用通过以下方法制备的SrWO ₄ / BN / GCE复合材料 超声波技术被证明是检测OD的合适选择。