A Facile Preparation of Carbon-Supported Nanoscale Zero-Valent Iron Fibers

Abstract:

In this paper, ferric alginate fibers was prepared by wet spinning of sodium alginate into a coagulating bath containing ferric chloride. The carbon-supported nanoscale zero-valent iron fibers (CSNZVIF) were obtained through thermal degradation of ferric alginate fiber at 900°Cunder N₂ atmosphere. The product was characterized by field emission scanning electron microscopy (FESEM), X-ray power diffractometer (XRD), and Brunauer-Emmett-Teller (BET) surface area. It was found that zerovalent iron particles were well dispersed in the amorphous carbon fibers. CSNZVIF has high surface areas of 352 m²/g. The existence of carboxylic group and hydroxyl group in ferric alginate structure unit plays key role in the formation of carbon-supported nanoscale zero-valent iron fibers. Fe³⁺ was reduced to Fe⁰ by hydroxyl group and as-formed amorphous carbon during heating under N₂. This thermal degradation and self-reduction reaction of ferric alginate fiber is potentially scalable to large production and continuous processing for preparing CSNZVIF.

• Periodical: Materials Science Forum (Volume 688)
• Pages: 349-352
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.688.349
• Online since: June 2011
• Authors: Qing Shan Kong, Chun Xiang Guo, Bing Bing Wang, Quan Ji, Yan Zhi Xia
• Keywords: Carbon-Supported Zerovalent Iron, Ferric Alginate Fiber, Nanoscale, Thermal Treatment, Wet Spinning

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