Issue 8, 2020

Development of an ultra-sensitive para-nitrophenol sensor using tri-metallic oxide MoO2·Fe3O4·CuO nanocomposites

Abstract

A tri-metal oxide, MoO2·Fe3O4·CuO (TMO), was synthesized by the co-precipitation method and characterized by XRD, SEM-EDS, and FTIR. The average particle size of the nanocomposite was found to be 34.85 nm. The zeta potential and hydrodynamic size of the MoO2·Fe3O4·CuO nanocomposite were studied in acidic and basic pH respectively. A glassy carbon electrode (GCE) was modified by MoO2·Fe3O4·CuO to develop a chemical sensor for para-nitrophenol (p-NP). A simple IV method was employed for this study. Excellent sensitivity, an ultra-low detection limit, long-term stability, and reproducibility of the MoO2·Fe3O4·CuO/Nafion/GCE sensor were observed towards p-NP. A linear calibration plot (r2: 0.9995) was obtained for 1.0 pM to 0.01 mM aqueous p-NP solution, with a sensitivity value of 5.2430 μA μM−1 cm−2 and remarkably low detection limit (LOD) of 0.2 pM.

Graphical abstract: Development of an ultra-sensitive para-nitrophenol sensor using tri-metallic oxide MoO2·Fe3O4·CuO nanocomposites

Supplementary files

Article information

Article type
Paper
Submitted
21 Aug 2020
Accepted
21 Sep 2020
First published
22 Sep 2020
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2020,1, 2831-2839

Development of an ultra-sensitive para-nitrophenol sensor using tri-metallic oxide MoO2·Fe3O4·CuO nanocomposites

M. A. Subhan, P. Chandra Saha, J. Ahmed, A. M. Asiri, M. Al-Mamun and M. M. Rahman, Mater. Adv., 2020, 1, 2831 DOI: 10.1039/D0MA00629G

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