One-pot engineering of novel cashew like cobalt tungstate; dynamic electrocatalyst for the selective detection of promethazine hydrochloride

Abstract

In recent years, advanced functional materials have been attaining a much important role in electrochemical sensors for day-to-day life activities. The specific detection of (bio) sensor with a cost-effective method has focused much recently and more comfortable with making a low-cost device for practical applications. Herein, we used a cost-effective method for fabricating the electrochemical sensing detector for promethazine hydrochloride (PHC) using cashew like cobalt tungstate (CW). The CW was synthesized using a simple co-precipitation method and was characterized using FTIR, Raman, XRD, FE-SEM, XPS, EDAX, and elemental mapping analysis. Also, the electrochemical activity and potential impact of the CW were scrutinized by CV and used towards the oxidation of PHC. As a result, the electrochemical experiments proved that the CW exhibits superior electrochemical performance with lower LOD and sensitivity of 0.0159 µM and 0.3056 µA µM−1 cm−2, respectively. Furthermore, the selectivity, repeatability, reproducibility, and real samples analysis of the sensor confirmed the promising nature of the CW modified electrode towards the detection of PHC.