Facile co-precipitation synthesis of strontium tungstate anchored on boron nitride (SrWO4/BN) nanocomposite as a promising electrocatalyst for pharmaceutical drug
Metal tungstate are considered as an efficient electrocatalyst in the sector of electrochemical sensor. Herein, we prepared alkaline earth metal based transition metal tungstate (SrWO4) through simple co-precipitation method. Further, to enhance the electrocatalytic activity, commercial available boron nitride (BN) was used to prepare SrWO4/BN composite with the aid of ultra-sonication method. As prepared SrWO4/BN composite were scrutinized using XRD, FTIR, FE-SEM, EDS, elemental mapping analysis, HR-TEM for the determination of phase purity, functional group, structural morphology of as prepared composite. The electrochemical performance of the SrWO4/BN composite was analyzed with the help of cyclic voltammetry and linear sweep voltammetry technique in three electrode system. As modified SrWO4/BN with glassy carbon electrode (SrWO4/BN/GCE) exhibits better electrochemical activity towards the reduction of ornidazole (OD) with lower cathodic peak potential (Epc = -0.62 V), increased cathodic current (Ipc = -21.3 µA) compared to other modified electrode for the detection of OD with larger linear range (0.01 µM – 437 µM) and lower limit of detection (0.003 µM). Further the interference study was carried out to detect hazardous metals like anionic, cationic, some of biological compounds and similar structural compounds for the examination of selectivity of as proposed sensor by SrWO4/BN/GCE reveals better selectivity. In addition, the practical feasibility of the sensor was inspected with commercial OD tablet and lake water samples, discloses the acceptable recovery of the sensor in real samples. From all the gained results, the proposed sensor via SrWO4/BN/GCE composite prepared by ultra-sonication technique evidences more appropriate candidate for the detection of OD.