Synthesis and antibacterial effects of cobalt–cellulose magnetic nanocomposites

Kornherr, A.; Alahmadi, N. S.; Betts, J. W.; Kelly, S.M.; Francesconi, M. G.; Prior, T. J.; Wadhawan, J. D.; Cheng, F.; Francesconi, M. Grazia; Kelly, S. M.; Prior, Timothy; Wadhawan, Jay; Kornherr, Andreas

Abstract

© The Royal Society of Chemistry. Green synthesis is employed to prepare cobalt/cellulose nanocomposites with cubic (α-cobalt) cobalt as a main component with antibacterial and magnetic properties. An in situ reduction of aqueous solutions of cobalt ions on a model cellulose substrate surface using hydrogen gas affords spherical, cellulose-stabilised cobalt nanoclusters with magnetic properties and an average diameter of 7 nm that are distributed evenly over the surface of the cellulose fibres. These cobalt/cellulose nanocomposites exhibit good antibacterial action against opportunistic pathogens both Gram-positive (S. aureus) and Gram-negative (E. coli, A. baumannii and P. aeruginosa), with zones of inhibition up to 15 mm, thereby encouraging the deployment of these advanced materials for the treatment of wastewater or within medical dressings. This method of preparation is compared with the analogous in situ reduction of cobalt ions on a cellulose surface using sodium borohydride as reducing agent.

Citation

Kelly, S., Kornherr, A., Alahmadi, N. S., Betts, J. W., Francesconi, M. G., Prior, T. J., …Kornherr, A. (2017). Synthesis and antibacterial effects of cobalt–cellulose magnetic nanocomposites. RSC advances, 7(32), 20020-20026. https://doi.org/10.1039/c7ra00920h

• Journal Article Type: Article
• Acceptance Date: Mar 28, 2017
• Online Publication Date: Apr 5, 2017
• Publication Date: Apr 5, 2017
• Deposit Date: Sep 21, 2017
• Publicly Available Date: Sep 21, 2017
• Journal: RSC Advances
• Print ISSN: 2046-2069
• Electronic ISSN: 2046-2069
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 32
• Pages: 20020-20026
• DOI: https://doi.org/10.1039/c7ra00920h
• Keywords: Magnetic nanocomposites, Cobalt nanoparticles, Synthesis and characterisation
• Public URL: https://hull-repository.worktribe.com/output/454967
• Publisher URL: http://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C7RA00920H#!divAbstract
• Additional Information: : This document is Similarity Check deposited; : M. G. Francesconi (ORCID); : S. M. Kelly (ORCID); : The Royal Society of Chemistry has an exclusive publication licence for this journal; OPEN ACCESS: This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0); : Single-blind; : Received 21 January 2017; Accepted 28 March 2017; Version of Record published 5 April 2017