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All Journal JURNAL KIMIA SAINS DAN APLIKASI
Putri, Retno Wahdany Huda
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Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

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The Potency of Noni Leaves Extract (Morinda citrifolia L.) as a Bioreductor in the Synthesis of Copper Nanoparticles and Its Effectiveness as an Antibacterial against Streptococcus pyogenes Putri, Retno Wahdany Huda; Sutoyo, Suyatno
Jurnal Kimia Sains dan Aplikasi Vol 28, No 3 (2025): Volume 28 Issue 3 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.3.138-145

Abstract

The noni (Morinda citrifolia L) is one of Indonesia’s traditional medicinal plants, which people have widely used to treat dysentery, hypertension, diabetes, and heart attacks and prevent cancer. The noni contains phenolic compounds, namely flavonoids, anthraquinones, alkaloids, and tannins, which have the potential to act as bioreductors. The research aims to synthesize copper nanoparticles (CuNPs) using noni leaves extract as a bioreductor and assay their antibacterial activity. CuNPs were synthesized by mixing noni leaf extract and copper sulfate in a 1:1, 1:2, 1:3, and 1:4 ratio. It was characterized using UV-Vis, PSA, FTIR, and XRD. Antibacterial activity was tested using the disc diffusion method on Streptococcus pyogenes. The results showed that the optimum synthesis of CuNPs was at a ratio of 1:3 and pH 10. CuNPs had a maximum UV-Vis absorption wavelength at 305 nm, an average particle size of 5.46 nm with a polydispersity index (PDI) of 0.2048, and the Cu-O peak was observed at 560 cm-1 in the FTIR spectrum. XRD measurements revealed peaks at 2θ angles of 43.38°, 50.50°, and 74.43°. CuNPs showed good potential as an antibacterial agent against Streptococcus pyogenes with an average inhibition zone diameter of 17.3 mm. Thus, copper nanoparticles synthesized using noni leaf extract bioreductor had the potential to be developed as an antibacterial agent for Streptococcus pyogenes.
Co-Authors Sutoyo, Suyatno