Synthesis and characterization of boron-doped Bi2O3 - La2O3 fiber derived nanocomposite precursor |
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Authors: | Şenol Durmuşoğlu İbrahim Uslu Tuncay Tunç Selda Keskin Arda Aytimur Ahmet Akdemir |
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Affiliation: | 1. Department of Mechanical Engineering, Institute of Natural and Applied Sciences, Selcuk University, Sel?uklu, Konya, 42090, Turkey 2. Department of Chemistry Education, Gazi Faculty of Education, Gazi University, Besevler, Ankara, 06500, Turkey 3. Science Department, Faculty of Education, Aksaray University, Aksaray, 68100, Turkey 4. Central Laboratory, Middle East Technical University, Eski?ehir Yolu, Ankara, 06531, Turkey 5. Department of Chemistry Education,Gazi Faculty of Education, Gazi University, Be?evler, Ankara, 06500, Turkey 6. Department of Mechanical Engineering, Faculty of Engineering & Architecture, Selcuk University, Sel?uklu, Konya, 42090, Turkey
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Abstract: | Boron doped poly(vinyl) alcohol/ bismuth - lanthanum acetate (PVA/Bi-La) nanofibers were prepared by electrospinning using
PVA as a precursor. The effect of boron doping was investigated in terms of solution properties, morphological changes and
thermal characteristics. The fibers were characterized by FT-IR, XRD, SEM and BET. The addition of boron did not only increase
the thermal stability of the fibers, but also their diameters, which yielded stronger fibers. XRD analyses showed that boron
doping increased the peak intensities and indicated that the boron doping enhanced the crystallite size. Moreover, no shifts
were noticed in diffraction angles for boron doped and undoped samples. Therefore, boron doping did not significantly alter
the lattice spacing. The SEM micrograph of the fibers showed that the addition of boron resulted in the formation of cross
linked bright surfaced fibers. Also, grain diameters of boron doped and undoped nanocrystalline sintered powders were measured
as 170 nm and 120 nm respectively. The BET results show that boron undoped and doped Bi2O3-La2O3 nanocrystalline powder ceramic structures sintered at 800 °C have surface areas of 20.44 m2/g and 12.93 m2/g, respectively. |
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