Evaluate the Ni-ZnO/g-C3N4 Nanocomposite for Photocatalytic Degradation of Organic Defect Degradation and Antibacterial Activity

Abstract

In the present work, an effective, ecofriendly and novel photocatalytic composite of Ni-ZnO/g-C₃N₄ (NZG) has been successfully prepared via a hydrothermal method. The crystalline structure and phase purity of the produced g-C₃N₄, Ni-ZnO, and Ni-ZnO/g-C₃N₄ nanocomposite were ascertained using XRD analysis. Both the g-C₃N₄, and Ni-ZnO retained peaks showed minor changes that suggested component interaction. Determine the functional groups and validate the composite’s development using FTIR analysis of the combined g-C₃N₄, and Ni-ZnO characteristics, along with the addition of new Zn-O and C-N stretching bands. The optical properties and bandgap energy were observed for g-C₃N₄, Ni-ZnO, and Ni-ZnO/g-C₃N₄ nanocomposite were 360, 380, and 470 nm⁻¹ with 2.74, 2.94 and 2.86 eV. The homogeneous distribution of Ni-ZnO nanoparticles on g-C₃N₄, sheets, with strong contact at the interface and consistent elemental composition, was shown by using TEM analysis to investigate the morphological and elemental composition. The photocatalytic degradation efficiency was investigated against RB5 dyes. The Ni-ZnO/g-C₃N₄ nanocomposite showed excellent than pure Ni-ZnO and g-C₃N₄ catalyst reached 89.7% degradation for RB5 after 120 min under UV light. Due to this enhanced stability, in addition to the improved electron hole separations and synergistic photocatalytic mechanism between Ni-ZnO and g-C₃N₄ is an excellent photocatalytic activity against waste water management. The positive control chloramphenicol was showed the inhibition zone was against Sterptococcus aureus and Enterococcus faecalis for 16 nm and 18 nm, for negative control there was no zone of inhibition, and the Ni-ZnO/g-C₃N₄ NCs showed the maximum zone of inhibition was observed in Enterococcus faecalis for 21 nm at and 100 µg/mL respectively.