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      Electrospun Fe2O3 entrenched SiO2 supported N and S dual incorporated TiO2 nanofibers derived from mixed polymeric template/surfactant: enriched mesoporosity within nanofibers, effective charge separation, and visible light photocatalysis activity

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      Author
      Pradhan, Amaresh C.
      Uyar, Tamer
      Date
      2019
      Source Title
      Industrial and Engineering Chemistry Research
      Print ISSN
      0888-5885
      Publisher
      American Chemical Society
      Volume
      58
      Issue
      28
      Pages
      12535 - 12550
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      The α-Fe2O3 promoted and SiO2 supported N and S dual incorporated TiO2 nanofibers (FeSiNST NFs) along with neat oxide NFs have been synthesized by electrospinning via sol–gel. The keen approach is that mixed polyvinylpyrrolidone (PVP) as template and cetyltrimethylammonium bromide (CTAB) as surfactant are responsible for the creation of mesoporosity within NFs. The photoluminescence (PL) spectrum and UV–visible diffuse reflectance spectroscopic (DRS) result revealed the role of α-Fe2O3 as catalytic promoter in FeSiNST NFs by suppressing electron–hole (e––h+) recombination, red shifting, and oxygen vacancies (Ovs). The design of FeSiNST NFs by combining with SiO2 as catalytic support and N and S as visible light absorbers in TiO2, beautifies the present study. The high photocurrent (3.2 mA/cm2), high Efb value (−1.0 V), and low Rct value (∼74 Ω) support the enhanced photocatalysis (photoreduction and photodegradation) by FeSiNST in visible light. Charge transfer phenomena, Ovs, mesoporosity, and separation of e––h+ are the vital factors for an effective photocatalysis achievement.
      Keywords
      Photocatalysis
      Oxides
      Porosity
      Lattices
      Mesostructures
      Permalink
      http://hdl.handle.net/11693/53360
      Published Version (Please cite this version)
      https://dx.doi.org/10.1021/acs.iecr.9b00970
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