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Kyratzis, Ilias
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Publications (8/8 displayed)
- 2023Electrical capability of 3D printed unpoled PVDF/TPU sensors combined with carbon black and barium titanatecitations
- 2017Large Scale Preparation and Characterisation of Electrospun Carbon particle-nanofibre Composites for Ammonia Adsorption
- 2015S/PPy composite cathodes for Li-S batteries prepared by facile in-situ 2-step electropolymerisation process
- 2013Fabrication and characterisation of polypropylene nanofibres by meltblowing process using different fluidscitations
- 2012Surface modified titanium zirconium oxide nanofiber web as a heavy metal ion adsorbent for water remediation applications
- 2012Development of a flexible, wearable and rechargeable battery
- 2012Development of a flexible, wearable and rechargeable battery
- 2011Aligned Carbon Nanotube Based Sensors and Biosensors Using CNT Webs and Electrospun CNT-Polymer Composites
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document
Surface modified titanium zirconium oxide nanofiber web as a heavy metal ion adsorbent for water remediation applications
Abstract
Electrospinning is primarily used for the preparation of polymeric nanofibers, however in the last 10 years inorganic nanofiber synthesis using this technique has been widely studied. Electrospun materials are generally considered as highly porous materials, however, the pores are inter-fiber spaces with dimensions commonly of several hundred nanometers to a few micrometers. For metal oxide materials, high surface areas are required to assure a large number of surface hydroxyls, as these groups play a role as either functional ends or anchors toward further surface modification. To significantly increase the surface area in electrospun fibers, it is necessary to create pores in the fiber additional to the inter-fiber pores.This paper presents the development of high surface area titanium zirconium oxide nanofibers with and without surface modification for heavy metal ion adsorption. The structural platform, a mixed titanium zirconium oxide non-woven nanofiber web, was prepared by using an electrospinning technique followed by thermal treatment to pyrolyze organic additives. A surfactant was incorporated in the electrospinning solution, which acts as a structure directing agent to create pores and significantly increase the surface area of the resulting fibers, thereby maximizing sites for surface modification. Cadmium ion (Cd(II)) adsorption on the phosphonic acid functionalized nanofibers was much higher than the non-modified nanofibers. In addition, the Cd(II) adsorption on the functionalized nanofibers was much less dependent on the pH of analyte solutions than the bare metal oxide nanofibers whose surface charge varied in the different pH environments. As a nanofiber web, the material has benefits in recovery and re-use compared to nano- or micrometer sized particle-based heavy metal ion adsorbents.