Electrochemical investigation of Mn₃O₄/ZrO₂ nanocomposite; a robust sensor platform for the sensitive determination of bisphenol A

ABSTRACT

Electrochemical sensing of bisphenol A by Mn₃O₄/ZrO₂ nanocomposite-modified screen printed graphite electrode (SPGE) was explored. Mn₃O₄/ZrO₂ nanocomposite was prepared through a simple method. Field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) confirm the successful synthesis of this nanocomposite. The Mn₃O₄/ZrO₂/SPGE exhibited good electrocatalytic performances towards bisphenol A with a sensitivity of about 0.0753 μA μM⁻¹ and a low limit of detection (LOD) (9.0 nM) in the linear ranges of 0.03–375.0 μM. Besides this, the long-time performing stability, reproducibility and repeatability of the sensor are found to be reliable and good. The practical utility of this new sensor was substantially revealed for detecting bisphenol A in real samples. Considering the very good results, it seems that the Mn₃O₄/ZrO₂/SPGE can be considered as a new method in the development of accurate and inexpensive electrochemical sensors.

KEYWORDS:

• Electrochemical sensing
• bisphenol A
• screen-printed graphite electrode
• Mn₃O₄/ZrO₂ nanocomposite

Acknowledgements

The authors acknowledge the financial support provided for this project by the Sirjan School of Medical Sciences, Sirjan, Iran.

Disclosure statement

No potential conflict of interest was reported by the author(s).