Sustainable Synthesis
of Nickel Oxide Nanoparticles via Manilkara Zapota Extract for Advanced Wastewater
Treatment
Prajapati Jay and Patel K.N.
Res. J. Chem. Environ.; Vol. 29(9); 46-55;
doi: https://doi.org/10.25303/299rjce046055; (2025)
Abstract
Using leaf extract from Manilkara zapota, biogenic nickel oxide nanoparticles (NiO-NPs)
were successfully produced and their photocatalytic effectiveness in breaking down
Congo red dye was assessed. An eco-friendly, economical and sustainable substitute
for traditional chemical processes is offered by this green synthesis technique.
The structural, morphological and optical characteristics of the produced NiO-NPs
were confirmed by means of Fourier Transform Infrared Spectroscopy (FTIR), UV-Vis
spectroscopy, High-Resolution Transmission Electron Microscopy (HRTEM) and X-ray
diffraction (XRD). NiO-NPs demonstrated strong photocatalytic activity when exposed
to sunlight and important factors including catalyst dosage and dye concentration
affected the rate of degradation. The degradation mechanism and ideal circumstances
for maximum Congo red decolorization were determined, exposing the function of NiO-NPs
in promoting redox reactions.
Furthermore, by lowering pH, electrical conductivity, chemical oxygen demand, total
dissolved solids, phosphates and sulfates, NiO-NPs successfully enhanced wastewater
quality. These results highlight the potential of biogenic NiO-NPs as an effective
and environmentally benign remedy for environmental cleanup and azo dye degradation,
supporting long-term pollution management plans.
