Abstract
A facile hydrothermal process was used to prepare MnCoxOy, nanoparticles (NPs) in alkaline medium (pH-10.5) at room temperature. The NPs were characterized by Fourier-transform infrared spectroscopy (FTIR), ultraviolet visible spectroscopy (UV/vis), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), and powder X-ray diffraction (XRD). A thin layer of NPs film as a chemical sensor was fabricated on a glassy carbon electrode (GCE) with the help of a conducting binder. The sensor was implemented successfully for the detection 3,4-DAT with reliable I-V approach at low potential. The sensor-features include good sensitivity (0.37 mA mu molL(-1)cm(-2)), low detection limit (LOD=0.26 +/- 0.01 pmolL(-1) at a signal to noise ratio of 3), low limit of quantification (LOQ=7.80 +/- 0.01 pmolL-1), good reliability, good reproducibility, ease of integration, and long-term stability were investigated. The sensor response towards 3,4-DAT is linear in logarithmic scale over a large concentration range (1.0 pmolL(-1) to 1.0 mu molL(-1)). This work is introduced a route for future sensitive sensor development based on MnCoxOy NPs by reliable I-V method for the detection of hazardous and carcinogenic toxins in environmental and health care fields.