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All Journal Jurnal Fisika Unand
Sri Handani
Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Andalas
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Sintesis Hijau dan Karakterisasi Nanopartikel ZnO Menggunakan Ekstrak Daun Kelapa Sawit (Elaeis guineensis) Daniel Hizhar; Sri Handani; Elvaswer
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.236-243.2026

Abstract

This study aims to synthesize zinc oxide (ZnO) nanoparticles through a green synthesis approach using palm oil leaf extract as a natural reducing and stabilizing agent. The green synthesis method utilizes phytochemical compounds present in the palm oil leaf extract to reduce zinc acetate dihydrate precursor into ZnO nanoparticles. The crystal structure, functional groups, and morphology of the synthesized ZnO nanoparticles were characterized using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Field Emission Scanning Electron Microscopy (FESEM), respectively. The XRD results indicate that the ZnO nanoparticles exhibit a hexagonal wurtzite crystal structure without impurity phases, with an average crystallite size of 22.20 nm. FTIR analysis confirms the presence of Zn–O bonds along with residual organic functional groups originating from the palm oil leaf extract. FESEM images reveal spherical to quasi-spherical particle morphology with agglomerated structures and a uniformly distributed average particle size of 84.40 nm. These results demonstrate that palm oil leaf extract is effective for the green synthesis of ZnO nanoparticles.
Karakterisasi Komposit Serat Pelepah Pisang dan Serbuk Cangkang Kelapa Sawit Jumatul Annisa; Dwi Puryanti; Sri Handani
Jurnal Fisika Unand Vol 15 No 3 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.3.269-275.2026

Abstract

Research on themanufacture of composites reinforced with banana stem fiber and palm kernel shells aims to analyze the effect of variation in the volume fractionof banana stem fiber and palm kernel shells on the mechanical and physical properties of the composite. The composite was fabricated using the hand lay-up method with volume fraction variations (matrix: fiber: shell) of 40%:50%:10%, 40%:40%:20%, 40%:30%:30%, 40%:20%:40%, and 40%:10%:50%. Mechanical test include Charpy impact test, compressive strength test using a Universal Testing Machine (UTM),Vickers hardness test, and water absorption test. The results showed that the highest impact strength of 0,0947 J/mm2 was obtained at 40%:20%:40% composition, the highest compressive strength of 7,69 MPa at 40%:50%:10%, and the highest hardness value of 18,68 HV at 40%:40%:20%. The lowest water absorption value of 14,28% at 40%:10%:50%. These result indicate that the composition of 40%:20%:40% is the optimum composition for automotive dashboard applications, as it meets the mechanical standards required for dashboard materials.
Pembuatan Nanopartikel Zinc Oxide melalui Metode Sintesis Hijau menggunakan Ekstrak Daun Kersen (Muntingia calabura L.) Adinda Mahesa Putri; Sri Handani; Afdhal Muttaqin
Jurnal Fisika Unand Vol 15 No 4 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.4.389-396.2026

Abstract

This study aims to synthesize ZnO nanoparticles through a green synthesis approach utilizing Muntingia calabura L. leaf extract as a natural bioreducing and stabilizing agent. The green synthesis route was chosen for its environmental friendliness and sustainability compared to conventional chemical methods that rely on toxic reagents and high energy consumption. The Muntingia calabura leaf extract, rich in secondary metabolites such as flavonoids, polyphenols, and tannins, acted as reducing agents to convert Zn²⁺ ions into ZnO nanoparticles. The synthesis involved mixing various extract concentrations (5%, 10%, 15%) with 0.05 M zinc acetate dihydrate, followed by calcination at 600°C. UV-Vis spectra showed an absorption peak around 370 nm, confirming the formation of ZnO nanoparticles. XRD analysis indicated a hexagonal wurtzite crystal structure with an average crystallite size of 20–40 nm, while SEM revealed nearly spherical morphology with uniform distribution. FTIR confirmed the presence of –OH and C=O functional groups from phenolic compounds that acted as capping agents. These findings highlight the promising role of Muntingia calabura leaf extract as a sustainable biogenic source for ZnO nanoparticle synthesis.
Co-Authors Adinda Mahesa Putri Afdhal Muttaqin Daniel Hizhar Dwi Puryanti Elvaswer Jumatul Annisa