Green-synthesised cobalt oxide (Co₃O₄) nanoparticles using aloe-vera latex for their photocatalytic and electrochemical sensor studies

Abstract

The current study aimed to investigate multiple applications of synthesised 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 the existence of cubic phases and crystalline behaviour of synthesised CONPs. Surface morphology and elemental analysis of prepared sample were 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 synthesised photocatalyst on AR-88 dye (40 ppm) under the effect of irradiation of UV-light. Electrochemical behaviour of achieved CONPs was effectively examined by cyclic voltammetry (CV) and electrochemical impedance methods in 1 M KOH. Further, the excellent sensor performance on paracetamol chemical and glucose bio-molecules was examined using CO carbon paste electrode (COCPE). These analyses were revealed that CONPs is an effective and promising material for electrochemical sensor and photocatalytic studies.

GRAPHICAL ABSTRACT

Keywords:

• Co₃O₄ nanoparticles
• green fuel
• electrochemical sensor
• photocatalytic studies
• amperometry

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The data and materials that support the findings of this study are available with the corresponding author.

Code availability statement

Not applicable.

Additional information

Funding

Not applicable.