Green Synthesis of Zinc Oxide Nanoparticles Using <i>Centella asiatica</i> (L.) Urb. Extract: Characteristics and Applications

Centella asiatica is one of the popular plant sources used in green synthesis application due to its antibacterial and cell regeneration stimulating properties. The objective of studying the synthesis process of ZnO nanoparticles in pennywort extract is to analyze the structure and morphology of materials using modern analytical methods. ZnO nanoparticles are used to remove CIP antibiotics in wastewater and are intended for application in cosmetic products. The results of the adsorption process to remove the antibiotic ciprofloxacin after 90 min, with an adsorption dose of 0.005 g L−1, an initial concentration of 100 mg L−1 in a pH 6 environment, showed an adsorption capacity of 152.93 mg g−1. The adsorption data followed the pseudo-second-order adsorption kinetic model and the Dubinin-Radushkevich adsorption isotherm model according to the non-linear regression method. The synthetic ZnO nanoparticles in a skincare mask product application with an SPF index of 14.12 and sun protection ability of 93.92% were evaluated.