Research Publications
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Publication Open Access Macaranga peltata Leaf Extract Mediated Green Synthesis of Iron Nanoparticles and Their Application in Organic Dye Removal(Faculty of Engineering, 2026-03) Dissanayake D.M.K.N.; Perera M.A.D; Karunaratne M.S.A; Pahalagedara M.NThis study presents an eco-friendly method for synthesizing iron nanoparticles (FeNPs) using Macaranga peltata leaf extract, and evaluate their potential for degrading the organic dye methyl orange (MO). The synthesis exploits phytochemicals in the leaf extract as natural reducing and stabilizing agents. The synthesized FeNPs were characterized using UV-Vis spectroscopy, FTIR, XRD, and SEM, confirming amorphous structure and particle sizes ranging from 34–94 nm. Catalytic activity was evaluated via MO degradation experiments, achieving 85.16% efficiency within 200 minutes. The study demonstrates a sustainable wastewater treatment solution using green nanotechnology.Publication Open Access Macaranga peltata Leaf Extract Mediated Green Synthesis of Iron Nanoparticles and Their Application in Organic Dye Removal(Faculty of Engineering, 2025-09-09) Dissanayake D.M.K.N.; Perera M.A.D.; Karunaratne M.S.A.; Pahalagedara M.N.This study presents an eco-friendly method for synthesizing iron nanoparticles (FeNPs) using Macaranga peltata leaf extract, evaluating their potential in degrading the organic dye methyl orange (MO). The synthesis exploits phytochemicals in the leaf extract as natural reducing and stabilizing agents. The synthesized FeNPs were characterized using UV-Vis spectroscopy, FTIR, XRD, and SEM, confirming amorphous structure and particle sizes ranging from 34–94 nm. Catalytic activity was evaluated via MO degradation experiments, achieving 85.16% efficiency within 200 minutes. The study demonstrates a sustainable solution for wastewater treatment through green nanotechnology.Publication Open Access Methyl Orange Degradation by Green Synthesized Iron Oxide Nanoparticles by Syzygium aromaticum(Faculty of Humanities and Sciences, SLIIT, 2023-11-01) Gaminda, K.A.P; Abeysinghe, T; Jayasinghe, C; Senthilnithy, RWater contamination due to textile dyes is considered carcinogenic to the environment and living organisms. Many textile dyes resist degradation, and the degradation by-products of the textile dye cause severe effects on the ecosystems. Iron oxide nanoparticles were synthesized using Syzygium aromaticum extract to address this issue. Herein, the azo dye methyl orange (MO) degradation by the green synthesized iron oxide nanoparticles (GINPs) was investigated. The synthesized GINPs were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and Fourier-Transform Infrared (FT-IR) spectroscopy. The results showed a successful synthesis and fabrication of GINPs by the S. aromaticum extract with the size ranging from nano to micro-region. A 100 ppm of MO was degraded up to 43 ppm in the first 20 min and reached equilibrium at 120 min, and the dye was degraded up to 40 ppm by the GINPs. At the equilibrium stage, 50 % of MO was degraded with a dosage (~20 ± 1 mg) of the GINPs, indicating the capability of GINPs in MO degradation compared to chemically synthesized zero-valent iron nanoparticles (CINPs).