FORMATION KINETICS OF GREEN SILVER NANOPARTICLES USING GNETUM GNEMON L. LEAF AND FRUIT EXTRACT AS BIOREDUCTORS

This research was carried out with the aim of determining the formation rate of green silver nanoparticles using Gnetum gnemon L. leaves and fruit as a reducing agent.In the synthesis of silver nanoparticles, each bioreductant extract is mixed with a silver nitrate solution.From color observations, the silver nanoparticles using Gnetum gnemon L. leaves and fruit showed a color change from clear to yellowish-brown.The results of measurements using a colorimeter at a wavelength of 430 nm showed an increase in the absorbance value after 1 hour of mixing for the AgNPs using Gnetum gnemon L. leaves and 1.33 hours for the AgNPs using Gnetum gnemon L. fruit.The color change and increase in absorbance values of the two samples began to stabilize after 5 hours of mixing until measurements on the 5th day.The rate of formation of silver nanoparticles using Gnetum gnemon L. leaves is 710 -6 s -1 and the rate of formation of AgNPs using Gnetum gnemon L. fruit is 3.810 -4 s -1 .Measurements using UV-Vis showed that LSPR silver nanoparticles with Gnetum gnemon L. leaf as bioreductor at a wavelength of 439 nm and nanoparticles with Gnetum gnemon L. fruit as bioreductor at a wavelength of 405 nm.