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      Electrospun BiOI nano/microtectonic plate-like structure synthesis and UV-light assisted photodegradation of ARS dye

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      Author(s)
      Babu, V. J.
      Bhavatharini, R. S. R.
      Ramakrishna, S.
      Date
      2014
      Source Title
      RSC Advances
      Print ISSN
      2046-2069
      Publisher
      Royal Society of Chemistry
      Volume
      4
      Issue
      37
      Pages
      19251 - 19256
      Language
      English
      Type
      Article
      Item Usage Stats
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      122
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      Abstract
      BiOI electrospun nanofibers were prepared by using PAN as a supporting polymer. Subsequent annealing at 500 °C for 5 h, with a ramp rate of about 5 °C min-1 in air, breaks the nanofibers down to tectonic plate-like nano/microstructures. The surface physical and chemical structural changes were then further characterized by FE-SEM, TEM, XRD and XPS. The results reveal that the morphology and crystallite size of BiOI vary strongly depending on the precursor concentration used in the synthesis method. These nanostructures were later employed for photocatalytic degradation of a synthetic textile dye, Alizarin Red S (ARS). The photocatalytic efficiencies were found to be about 93.34% after 100 min of UV-light (340 nm) illumination. Photocatalytic activity (PCA) performance depends on morphology and band alignment. All the compositions follow first order pseudo-kinetics, which was found to be 0.1197 min-1 for a doping concentration of 3%. The enhancement in photodegradation could be possibly by photocatalysis and a photosensitization phenomenon. This has been explained based on the band edge position. © the Partner Organisations 2014.
      Keywords
      Nanofibers
      Photocatalysis
      Chemical structural changes
      Doping concentration
      Electrospun nanofibers
      Photo catalytic degradation
      Photocatalytic activities
      Photocatalytic efficiency
      Plate-like structure
      Precursor concentration
      Morphology
      Permalink
      http://hdl.handle.net/11693/26655
      Published Version (Please cite this version)
      https://doi.org/10.1039/c4ra00579a
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      • Nanotechnology Research Center (NANOTAM) 1063
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