Electro-oxidative determination of aromatic amine (o-phenylenediamine) using organic-inorganic hybrid composite.

A highly sensitive o-phenylenediamine (OPD) sensor based on a FeO doped with functionalized multi-walled carbon nanotubes (FeO@f-MWCNTs) composite fabricated glassy carbon electrode (GCE) was developed. The modified FeO@f-MWCNTs/GCE showed an enhanced current (I) response toward OPD relative to that of a FeO/GCE, f-MWCNTs/GCE, and a bare GCE. Under optimum conditions, the FeO@f-MWCNTs/GCE showed a wide linear range remove at OPD concentrations of 0.6-80µM. The limit of detection and sensitivity of the f-MWCNTs/GCE, FeO/GCE sensor were found to be 50µM, and 2.8002mAmMcm, respectively. The developed sensor showed excellent accumulation time, good repeatability, and operational stability. The obtained results suggest that the development of composite could be an effective electro-catalyst and it can play a vital role in biomedical, pharmaceutical, and hazardous free environmental applications.