Effect of Polyaniline on Structural and Optical Characteristics of Fe3O4 and TiO2 Nanoparticles
Ahmad Taufiq*, M. Sofiyudin Nuroni, ST. Ulfawanti Intan Subadra, Sunaryono, Arif Hidayat, Nurul Hidayat, Yudyanto
Department of Physics, Faculty of Mathematics and Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang 65145, Indonesia
Abstract
In recent years, the application of Fe3O4 and TiO2 nanoparticles for energy especially for battery has increased significantly. Therefore, the development of synthesis method and fundamental characterization becomes essential to be conducted. In this study, Fe3O4 and TiO2 nanoparticles were synthesized using coprecipitation and sonication methods, respectively. Meanwhile, Fe3O4/polyaniline and TiO2/polyaniline nanocomposites were synthesized using polymerization method. The samples obtained were then characterized by XRD, FTIR spectrometer, and UV-vis spectrometer. The results of the XRD analysis showed that polyaniline reduced the crystallinity of Fe3O4 and TiO2 nanoparticles. However, polyaniline did not change the crystal structure of Fe3O4 and TiO2 nanoparticles in the forms of cubic spinel and tetragonal structures, respectively. Moreover, Ti-O-Ti and Fe-O functional groups were detected at the range of the wavelength of 820-620 cm-1 and 410-520 cm-1. The addition of polyaniline was also detected by the functional groups of polyaniline presenting interaction of Fe3O4 and TiO2 with Polyaniline. Meanwhile, the results of UV-Vis analysis demonstrated that polyaniline caused the bandgap energy of Fe3O4 and TiO2 insignificantly decreased from 2.186 eV to 2.174 eV, and from 3.374 eV to3.320 eV, respectively.
Keywords: Fe3O4, TiO2, polyaniline, nanoparticle, bandgap energy.
Topic: Smart materials