Green-synthesised cobalt oxide (Co <sub>3</sub> O <sub>4</sub> ) nanoparticles using aloe-vera latex for their photocatalytic and electrochemical sensor studies
B. Avinash, C.R. Ravikumar, B.S. Surendra, Syed Khasim, N. Basavaraju, R. Ramesh, T. Naveen Kumar, N. Raghavendra
Abstract
The current study aimed to investigate multiple applications of synthesized cobalt oxide (Co3O4) nanoparticles (CONPs) via Aloe-Vera latex as green fuel by solution combustion approach. The structural parameters of prepared NPs were confirmed by several spectral methods such as; PXRD study shows existence of cubic phases and crystalline behaviour of synthesized CONPs. Surface morphology and elemental analysis of prepared sample was illustrated by SEM-EDX and TEM techniques. The optical measurement of CONPs was discussed by UV-Visible absorbance spectral technique using Kubelka–Monk function and its energy band-gap is 1.77 eV. This study explored excellent photo-dye-degradation action (98.8% at 135 min) of synthesized photocatalyst on AR-88 dye (40 ppm) under effect of irradiation of UV-light. Electrochemical behaviour of achieved CONPs was effectively examined by cyclic voltammetry (CV) and electrochemical impedance methods in 1M KOH. Further, the excellent sensor performance on paracetamol chemical and glucose bio-molecules were examined using CO carbon paste electrode (COCPE). These analyses were revealed that CONPs is effective and promising material for electrochemical sensor and photocatalytic studies.