Green synthesis of Ag:ZnO nanoparticles via solvothermal method: characterization, photocatalytic and dielectric properties

This study investigates the photocatalytic and dielectric properties of green-synthesized silver-doped zinc oxide nanoparticles (Ag:ZnONPs). FTIR analysis confirmed the presence of functional groups derived from the plant extract, which played a key role in the capping, and stabilization of the nanoparticles. SEM observations revealed rod-like and quasi-spherical nanostructures, while EDX analysis verified the successful incorporation of Ag into the ZnO matrix. XRD results confirmed the hexagonal wurtzite structure of synthesized sample, with an average crystallite size of approximately 20 nm. Photoluminescence studies showed near-band-edge emission with suppressed defect-related recombination, indicating improved charge carrier separation due to Ag doping. The Ag:ZnONPs demonstrated excellent visible-light photocatalytic performance, achieving nearly 99% degradation of crystal violet within 24 h and methyl orange within 72 h. Dielectric investigations revealed reduced impedance, and enhanced AC conductivity at room temperature, reflecting improved charge transport. The results highlight the multifunctional potential of green-synthesized Ag:ZnONPs for environmental remediation and advanced electronic applications.