Green synthesis nanoperak menggunakan ekstrak batang dadap serep (Erythrina Subumbrans (Hassk.) Merr)
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Batang dadap serep mengandung senyawa metabolit sekunder flavonoid, saponin, isoflavonoid, alkaloid dan lektin yang dapat berperan sebagai reduktor dalam biosintesis nanosilver. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi ekstrak cair batang dadap serep terhadap proses green sintesis nanopartikel perak (AgNPs). Ekstrak air batang dadap serep direaksikan dengan 1 mM AgNO3 dengan perbandingan volume 1:1 (FI), 1:2 (FII), dan 2:1 (FIII). Karakterisasi AgNPs meliputi surface plasmon resonance (SPR) menggunakan spektrofotometer UV/Vis pada panjang gelombang 300-700 nm, ukuran partikel, dan potensial zeta menggunakan Particle Size Analyzer (PSA). Hasil penelitian menunjukkan nilai SPR AgNPs adalah 429-436 nm, sedangkan ukuran partikel AgNPs FI, II, dan III adalah 66,13 nm, 75,76 nm, dan 75,96 nm. Nilai PDI di bawah 0,5 menunjukkan bahwa distribusi nanopartikel seragam. Nanopartikel paling stabil terdapat pada formula I.
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