Phytogenic Synthesis of Chitosan-Doped Zinc Oxide Nano Composites Using Annona muricata Linn: Evaluation of Antibacterial, Antioxidant and Antidiabetic Activities
摘要
Annona muricata has long been utilized in traditional medicine and biomedicine. In this study, we developed an eco-friendly method for synthesizing zinc oxide nanoparticles (CS-ZnO NPs) using A. muricata leaf extract. The synthesized CS-ZnO NPs were characterized by UV–visible spectroscopy (UV–vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and field emission scanning electron microscopy with energy-dispersive X-ray analysis (FESEM-EDAX). UV–vis analysis confirmed nanoparticle formation with a distinct absorption peak at 255 nm. FTIR identified functional groups responsible for nanoparticle stabilization, while XRD verified their crystalline nature. SEM images revealed predominantly spherical particles and EDAX confirmed the elemental composition of zinc and oxygen. The CS-ZnO NPs exhibited strong antibacterial activity against Gram-positive Enterococcus faecalis with a 10 mm zone of inhibition, along with notable antioxidant activity as demonstrated by DPPH (76.56%), ABTS (77.24%) and TAC (79.81%) assays. Additionally, the nanoparticles showed promising antidiabetic potential, inhibiting α-amylase (79.18%) and α-glucosidase (73.22%). Overall, these findings suggest that green-synthesized CS-ZnO NPs from A. muricata leaves possess significant antimicrobial, antioxidant and antidiabetic properties, making them highly promising for the biomedical applications.
Graphical Abstract