Deep Eutectic Solvent-Assisted Synthesis of a Strontium Tungstate Bifunctional Catalyst: Investigation on the Electrocatalytic Determination and Photocatalytic Degradation of Acetaminophen and Metformin Drugs

In this work, we propose a modified solid-state approachfor thesustainable preparation of a SrWO4 bifunctional catalystusing thymol-menthol-based natural deep eutectic green solvents(NADESs). Various spectroscopic and morphological techniques analyzedthe as-synthesized SrWO4 particles. Acetaminophen (ATP)and metformin (MTF) were selected as the model drug compounds. Theelectrochemical detection and photocatalytic degradation of ATP andMTF upon ultraviolet-visible (UV-vis) light irradiationin the presence of as-prepared SrWO4 particles as an activecatalyst are examined. The present study displayed that the proposedcatalyst SrWO4 has enhanced catalytic activity in achievingthe optimum experimental conditions, and linear ranges of ATP = 0.01-25.90 mu M and MTF = 0.01-25.90 mu M, a lower limit of detection(LOD) value (ATP = 0.0031 mu M and MTF = 0.008 mu M), andhigher sensitivity toward ATP and MTF determination were obtained.Similarly, the rate constant was found to be k =ATP = 0.0082 min(-1) and MTF = 0.0296 min(-1) according to the Langmuir-Hinshelwood model, benefittingfrom the excellent synergistic impact of the SrWO4 catalysttoward the photocatalytic degradation of the drug molecule. Hence,this work offers innovative insights into the applicability of theas-prepared SrWO4 bifunctional catalyst as an excellentfunctional material for the remediation of emerging pollutants inwater bodies with a recovery range of 98.2-99.75%. This work offers innovative sustainableinsights into theapplicability of the SrWO4 bifunctional catalyst as anexcellent functional material for the remediation of emerging pollutantsin water bodies.