Boosted electrocatalytic activity of in situ oxidized and surface covered crednerite CuMnO2/carbon nanofibers nanocomposite for ornidazole sensor

Abstract

A large number of antibiotics used as additives with feedstocks to promote the production capacity in cattle rearing and poultry farming are finally abandoned in the environment. Hence, the tracing of such antibiotics from the route is vital to environmental safety. Herein, the crednerite CuMnO2 and CuMnO2/CNFs nanocomposite were prepared by one-pot synthesis. The CNFs in precursor solution have been sonicated and the crednerite CuMnO2 was grown on CNFs hydrothermally with in-situ oxidation of CNFs. The as-prepared CuMnO2/CNFs covered glassy carbon electrode (GCE) reached a sensing range of 0.01 to 350 μM to ornidazole (ORD) antibiotics in the laboratory solution. The articulated detection limit of CuMnO2/CNFs/GCE to ORD and sensitivity are 0.21 nM and 0.511 μA μM−1 cm−2 respectively. Furthermore, the CuMnO2/CNFs nanocomposite has been tested for ORD in real samples and retrieved responses at a minimum of 90% in food, environmental and biological samples.