Sintesis dan Karakterisasi Nanokomposit Fe3O4@PEG:ZnO
DOI:
https://doi.org/10.25077/jfu.11.1.29-36.2022Keywords:
Fe3O4, PEG, ZnO, Precipitation, Optical PropertiesAbstract
Telah dilakukan penelitian tentang sintesis dan karakterisasi sifat optik pada nanokomposit Fe3O4@PEG:ZnO. Sampel yang digunakan adalah Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@ZnO (1:2), Fe3O4@PEG:ZnO (1:2), dan Fe3O4@PEG:ZnO (1:3). Metode yang digunakan untuk sintesis nanokomposit adalah metode presipitasi. Nanokomposit dikarakterisasi dengan menggunakan X-Ray Diffraction (XRD), Fourier Transform Infra (FTIR), UV-Vis Spectrometry, dan Particle Size Analyzer (PSA). Hasil karakterisasi XRD pada sampel dengan variasi Fe3O4, Fe3O4@ZnO 1:1, Fe3O4@ZnO 1:2, dan Fe3O4@PEG:ZnO 1:3 menunjukkan struktur besi oksida berturut-turut adalah cubic, monoclinic, rhombohedral, dan cubic. Sedangkan struktur ZnO untuk sampel dengan variasi Fe3O4@ZnO 1:1, Fe3O4@ZnO 1:2, dan Fe3O4@PEG:ZnO 1:3 adalah hexagonal. Ukuran kristal yang diperoleh pada Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@ZnO (1:2), dan Fe3O4@PEG:ZnO (1:3) berturut-turut sebesar 14,54 nm; 14,59 nm; 2,91 nm; dan 2,91 nm. Hasil karakterisasi sifat optik menunjukkan bahwa energi gap Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@PEG:ZnO (1:2), dan Fe3O4@PEG:ZnO (1:3) berturut-turut sebesar 2,06 eV; 2,56 eV; 3,17 eV; dan 2,25 eV. Pada pengujian FTIR terdapat ikatan O-H yang menunjukkan adanya serapan molekul air pada permukaan Fe3O4, ikatan C-O dan C-C menunjukkan terbentuknya PEG, dan ikatan Zn-O menunjukkan terbentuknya ZnO. Distribusi ukuran partikel Fe3O4@PEG:ZnO (1:2) yaitu pada rentang 0,246 μm (246 nm) hingga 0,030 μm (30 nm), dengan distribusi ukuran partikel terbanyak 0,030 μm (30 nm).References
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