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.

Automated summary

In this study, a modified solid-state approach using natural deep eutectic green solvents (NADESs) was proposed for the sustainable preparation of a bifunctional catalyst, SrWO4. The as-synthesized SrWO4 particles were analyzed using various spectroscopic and morphological techniques. The electrochemical detection and photocatalytic degradation of model drug compounds, ATP and MTF, were examined using the as-prepared SrWO4 particles as an active catalyst. The results showed that the SrWO4 catalyst exhibited enhanced catalytic activity, lower limit of detection values, and higher sensitivity towards ATP and MTF determination.