Biogenic approach for synthesis of ZnO/NiO nanocomposites as a highly efficient photocatalyst and evaluation of their biological properties

Abstract

Mixed metal oxide-based nanocomposites (NCs) had remained broadly used for photo catalysisfacilitated elimination of harmful substances from the aquatic ecosystem. Now a days searching for an improved photo catalyst looks plentiful metal oxide-based materials take began out of studies. In present works concerning the use of ZnO/NiO NCs as photocatalytic treatment of wastewater utilizing oxides of metals as photo catalysts has merged a subject of major concern. The way of coupling with other semiconductors for improved photo degradation in the presence of UV-visible light. NCs were mainly characterized by XRD, FT-IR, UV-DRS, morphological studies such as SEM and TEM, elemental composition by EDAX that all a rmed the effective synthesis of NCs. For instance, ZnO/NiONCs having a bandgap of about 3.11eV achieved an outstanding degradation activity toward 100% photo degradation of methylene blue (MB) within a short period of time. Further, prepared ZnO/NiO NCs have excellent antibacterial activity against both Gram negative and Gram-positive bacteria. This behavior is primarily caused by the accumulation of ZnO/NiO NCs on the bacteria's surface, which results in cytotoxic bacteria and a relatively increased ZnO, resulting in cell death. Also ZnO/NiO NCs exhibit essential harmless effects on human red blood cells and their intervention with the action of the clotting on both PPP and PRP in human erythrocytes. As an outcome, the studies have shown that Phyllanthus Niruri (L) mediated Green Synthesis by combustion methods performs well as a good capping agent to synthesize ZnO/NiO NCs with important multi-disciplinary applications.Extending laboratory and characterization facilities. Authors also thank DST-

Enhanced Photodegradation of Acetaminophen Using Efficient ZnO-NiO Nanofibers

“…Synergistic effects and heterojunctions of ZnO-NiO within the nanofibers are crucial for enhancing photocatalytic efficiency. These heterojunctions facilitate charge transfer and reduce the recombination of electron-hole pairs, which are essential for effective photocatalysis [42]. The presence of NiO at a certain ratio (ZN1.5) correlates with increased photocatalytic activity due to an improved heterostructure, while maintaining the surface area [43].…”

Green Synthesis, Characterization, and Evaluation of Photocatalytic and Antibacterial Activities of Co3O4–ZnO Nanocomposites Using Calpurnia aurea Leaf Extract

“…17 Numerous studies have explored the synthesis and application of n-type ZnO-based semiconductor materials in combination with other materials. For instance, Puttarajuet al 18 developed ZnO/NiO nanocomposites using Phyllanthusniruri L. extract for photocatalytic and biological activities. Bordbar et al 19 reported the green synthesis of CuO/ZnO nanocomposite using Melissa Officinalis L. leaf extract for photocatalytic degradation.…”

“…Numerous studies have explored the synthesis and application of n-type ZnO-based semiconductor materials in combination with other materials. For instance, Puttarajuet al 18 developed ZnO/NiO nanocomposites using Phyllanthusniruri L . extract for photocatalytic and biological activities.…”