Sains Malaysiana 46(10)(2017): 1935–1942


Synthesis of γ-Fe2O3, Fe3O4 and Copper Doped Fe3O4 Nanoparticles by Sonochemical Method

(Sintesis γ-Fe2O3, Fe3O4 dan Tembaga Terdop dengan Nanopartikel Fe3O4 melalui Kaedah Sonokimia)




1Department of Physics, Manonmaniam Sundaranar University, Tirunelveli-627 012, Tamilnadu, India


2CISL, Department of Physics, Annamalai University, Annamalai Nagar-608 002, Tamilnadu, India


Received: 10 February 2014/Accepted: 1 March 2017



Nanoparticles of undoped and copper doped with Fe3O4 of three concentrations (0.5, 1.0 and 1.5) are synthesized by sonochemical method. Structural, optical and morphological properties of these compounds were studied. Fe2+/Fe3+ ratio is found to be 2.36. Crystalline structure, lattice parameters, surface morphologies, direct and indirect band gap energies of the synthesized compounds were estimated and the results are discussed in detail. The XDR analysis indicates the Cu doped Fe3O4 nanoparticles have higher crystallinity than undoped samples. Average crystallite size is found to increase as Cu concentration increased. The FTIR results are proven by the presence of mixed magnetite-hematite nanostructures and it is complement to the XRD results. The presence of spherical, polygonal and agglomeration forms of the particles are visually seen in the SEM images. Direct and indirect band gap energy is found to be decreased as the copper concentration was increased.


Keywords: Copper; Fe2+/Fe3+ ratio; magnetite; sonochemical



Nanopartikel yang tidak terdop dan tembaga yang didop dengan tiga kepekatan Fe3O4 (0.5, 1.0 dan 1.5) disintesis oleh kaedah sonokimia. Struktur, sifat optik dan morfologi sebatian ini dikaji. Nisbah Fe2+/Fe3+ yang diperoleh adalah 2.36. Struktur kristal, parameter kisi, morfologi permukaan, tenaga jurang jalur langsung dan tidak langsung daripada sebatian yang disintesis telah dianggarkan dan hasilnya dibincangkan secara terperinci. Analisis XDR menunjukkan bahawa Cu terdop dengan nanopartikel Fe3O4 mempunyai kristalografi yang lebih tinggi daripada sampel yang tidak terdop. Ukuran purata kristal didapati meningkat apabila kepekatan Cu meningkat. Keputusan FTIR dibuktikan oleh kehadiran struktur nano hematit magnetit yang bercampuran dan ia pelengkap kepada keputusan XRD. Kehadiran bentuk sfera, poligon dan aglomerasi zarah dapat dilihat secara visual dalam imej SEM. Tenaga jurang jalur langsung dan tidak langsung didapati menurun kerana peningkatan kepekatan tembaga.


Kata kunci: Magnetit; nisbah Fe2+/Fe3+; sonokimia; tembaga


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