Fabrication and Photocatalytic Properties of Electrospun Fe-Doped TiO2 Nanofibers Using Polyvinyl Pyrrolidone Precursors

Abstract

For the removal of pollutants, a modified TiO2 photocatalyst is attracting attention. Fe-doped TiO2 nanofibers were prepared through a combination of electrospinning and calcination. Morphological characterization of the sample was conducted using field-emission scanning electron and transmission electron microscopy. The crystal structure of each sample was analyzed using high-resolution transmission electron microscopy, selected area electron diffraction, and Fast Fourier Transform imaging. The average diameter of the Fe-doped TiO2 nanofibers was measured to be 161.5 nm and that of the pure TiO2 nanofibers was 181.5 nm. The crystal phase when heat treated at 350 °C was anatase for TiO2 nanofibers and rutile for Fe-doped TiO2 nanofibers. The crystal phase of the TiO2 matrix was easily transitioned to rutile by Fe-doping. The photocatalytic performance of each sample was compared via the photodegradation of methylene blue and acid orange 7 under ultraviolet and visible light irradiation. In the Fe-doped TiO2 nanofibers, photodegradation rates of 38.3% and 27.9% were measured under UV irradiation and visible light, respectively. Although other catalysts were not activated, the photodegradation rate in the Fe-doped TiO2 nanofibers was 9.6% using acid orange 7 and visible light. For improved photocatalytic activity, it is necessary to study the concentration control of the Fe dopant.

Photocatalytic and Antimicrobial Properties of Electrospun TiO2–SiO2–Al2O3–ZrO2–CaO–CeO2 Ceramic Membranes

“…The ring-type diffraction pattern implied the well-crystallized structure of the nanofiber without the formation of any other phases. 71 , 72 The radius of apparent circles was measured and matched with Miller indices and diffraction angles (2θ). According to the measurements ( Table 1 ), SAED results were similar to XRD results in Figure 1 d showing the anatase phase of TiO 2 .…”

“…The selected area electron diffraction (SAED) pattern of the sample (Figure k,l) indicated the high crystallinity of anatase TiO 2 in the obtained ceramic nanofiber structure. The ring-type diffraction pattern implied the well-crystallized structure of the nanofiber without the formation of any other phases. , The radius of apparent circles was measured and matched with Miller indices and diffraction angles (2θ). According to the measurements (Table ), SAED results were similar to XRD results in Figure d showing the anatase phase of TiO 2 …”

Electrospun Structural Hybrids of Acyclovir-Polyacrylonitrile at Acyclovir for Modifying Drug Release

“…Electrospinning, initially a polymer treatment method, has spread its antennas to almost all fields of scientific applications [60][61][62][63][64][65]. For mainstream applications, the functional ingredients are often loaded into the electrospun nanofibers through a co-dissolved solution or melt [66].…”

Investigation of Morphological, Elemental, Structural, and Optical Properties of Fe-Doped TiO2 Nanoparticles

“…FTO was cleaned with ethanol and, using a voltmeter, checked its conducting side. By using tapes, FTO was fixed on the Table . A paste of TiO2 was deposited on its conducting side, which was dried for 1 hour and dipped into the Hina powder solution for some time, so that layer of dye (Hina Powder) is deposited onto the photo anode for light harvesting (Na et al, 2021). A photoanode of TiO2 was prepared.…”