Novel electroblowing synthesis of tin dioxide and composite tin dioxide/silicon dioxide submicron fibers for cobalt(ii) uptake.

Journal: RSC advances
Published Date: Apr 23, 2021

Abstract

Nanoscale SnO has many important properties ranging from sorption of metal ions to gas sensing. Using a novel electroblowing method followed by calcination, we synthesized SnO and composite SnO/SiO submicron fibers with a Sn : Si molar ratio of 3 : 1. Different calcination temperatures and heating rates produced fibers with varying structures and morphologies. In all the fibers SnO was detected by XRD indicating the SnO/SiO fibers to be composite instead of complete mixtures. We studied the Co separation ability of the fibers, since Co is a problematic contaminant in nuclear power plant wastewaters. Both SnO and SnO/SiO fibers had an excellent Co uptake with their highest uptake/ values being 99.82%/281 000 mL g and 99.79%/234 000 mL g, respectively. Compared to the bare SnO fibers, the SiO component improved the elasticity and mechanical strength of the composite fibers which is advantageous in dynamic column operation.

Authors

  • Johanna Paajanen
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.
  • Saara Weintraub
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.
  • Satu Lönnrot
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.
  • Mikko Heikkilä
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.
  • Marko Vehkamäki
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.
  • Marianna Kemell
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.
  • Timo Hatanpää
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.
  • Mikko Ritala
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.
  • Risto Koivula
    Department of Chemistry, University of Helsinki P.O. Box 55 FI-00014 Finland johanna.paajanen@helsinki.fi.

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