An electrochemical acetaminophen sensor based on La3+/Co3O4 nanoflowers modified graphite screen printed electrode architecture

Authors

• Iran Sheikhshoaie ¹
• Fariba Garakani Nejad ¹
• Hadi Beitollai ^{2, 3}

1. Department of Chemistry, Shahid Bahonar University, Kerman, Iran.
2. Environment Department, Institute of Science and High Technology and Environmental
3. Sciences, Graduate University of Advanced Technology, Kerman, Iran.

Abstract

In this study, the La³⁺/Co₃O₄ nanoflowers were synthesized by co-precipitation method. The morphology of the La³⁺/Co₃O₄NFs were characterized using scanning electron microscopy (SEM), and were further used to modify the graphite screen printed electrode (GSPE). The electrochemical behavior of acetaminophen at La³⁺/Co₃O₄NFs/GSPE has been studied in aqueous solutions. Experimental results showed that the La³⁺/Co₃O₄NFs modified GSPE possess excellent electrocatalytic activity toward the detection of acetaminophen. Under optimum conditions, the La³⁺/Co₃O₄NFs modified electrode exhibited high sensitivity and stability to acetaminophen over a wide linear range of concentrations from 0.5μM to 250.0μM, with a detection limit of 0.09μM. Finally, the proposed sensor was successfully applied to the detection of acetaminophen in real samples.

Keywords

• Acetaminophen
• Electrocatalytic activity
• Graphite screen printed electrode
• La3+/Co3O4 nanoflowers
• Modified electrode