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Hierarchical rutile/anatase TiO 2 nanorod/nanoflower thin film: Synthesis and characterizations

Daneshvar e Asl, S ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.mssp.2019.01.012
  3. Publisher: Elsevier Ltd , 2019
  4. Abstract:
  5. Hierarchical TiO 2 nanorod/nanoflower thin film was synthesized on fluorine doped tin oxide glass via hydrothermal and aqueous chemistry methods. According to field emission scanning electron microscopy results, the thin film was crack-free and uniform. Primary nanorods had an average diameter of 95 nm and a length of 2 µm. They were perpendicular to the substrate owing to the TiO 2 prenucleation. Growth of the nanoflowers on the nanorods could increase both the specific surface area and roughness. X-ray diffraction and Raman spectroscopy showed that the nanorods were rutile; while the nanoflowers were anatase. Efficient electron transfer from anatase to rutile could therefore occur. According to the diffuse transmittance spectroscopy examination, the light harvesting rate was ameliorated and the band gap energy reduced to 2.83 eV. This was attributed to the F - doping the sample during synthesis. The enhancement of the photoelectrochemical activity allowed substitution of the TiO 2 nanorod/nanoflower thin film for the traditional TiO 2 nanorods usually used in solar cells, sensors, and photocatalytic systems
  6. Keywords:
  7. Aqueous chemistry ; Hydrothermal ; Nanoflower ; Nanorod array ; Rutile/anatase TiO 2 ; Energy gap ; Field emission microscopes ; Hydrochemistry ; Nanocomposites ; Nanoflowers ; Nanorods ; Oxide minerals ; Scanning electron microscopy ; Semiconductor doping ; Tin oxides ; Titanium dioxide ; Field emission scanning electron microscopy ; Fluorine doped tin oxide ; Nano-rod arrays ; Synthesis and characterizations ; Transmittance spectroscopies ; Thin films ; Rutile/anatase TiO2
  8. Source: Materials Science in Semiconductor Processing ; Volume 93 , 2019 , Pages 252-259 ; 13698001 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1369800118321954