Browsing by Author "Nainggolan, Rezky Yoshua"

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    SINTESIS NANOPARTIKEL PERAK MENGGUNAKAN EKSTRAK DAUN JABON PUTIH (Anthocephalus cadamba Miq.)
    (Elfitra, 2023-12) Nainggolan, Rezky Yoshua
    Biosynthesis is one of the synthesis methods that used plants as reductor. The secondary metabolite compund in plants can be used as bioreductor fo synthesize silver nanoparticles. The purpose of this research was to synthesize silver nanoparticles using jabon putih leaf extract (Anthocephalus cadamba Miq.) using biosynthesis method. The extract was obtained from maseration method by mixing 5 g jabon putih leaves with 250 mL Aqua demineralized. After that, silver nanoparticles was synthesized with biosynthesis method that accompanied with variation of pH and AgNO3 solution’s concetration. The pH was variated in 3, 5, 7, 9, and 11 and AgNO3 solution’s concetration was variated in 0.1 mM, 1 mM, and 10 mM. the formed silver nanoparticles were analyzed using UV-Vis Spectrophotometry and Fourier Transform Infra Red (FTIR). The result of this research are showed in UV-Vis and FTIR’s Spectra. UV-Vis spectra analysis showed the existence of an optimum stable absorbance peak at wavelength of 431 nm with the absorbance of 1.331. This result was further supported by FTIR spectra, which shows the presence of the O-H group, a functional group that reduce Ag+ ions into Ag0. The best conditions to synthesize silver nanoparticles in this research were found to be at pH 3 with a concentration of AgNO3 solution of 1 mM.