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Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd2+ Cation Adsorption.
Riva, Laura; Dotti, Anna; Iucci, Giovanna; Venditti, Iole; Meneghini, Carlo; Corsi, Ilaria; Khalakhan, Ivan; Nicastro, Gloria; Punta, Carlo; Battocchio, Chiara.
Afiliação
  • Riva L; Department of Chemistry, Materials, and Chemical Engineering "G. Natta", Politecnico di Milano and INSTM Local Unit, Via Mancinelli 7, 20131 Milano, Italy.
  • Dotti A; Department of Chemistry, Materials, and Chemical Engineering "G. Natta", Politecnico di Milano and INSTM Local Unit, Via Mancinelli 7, 20131 Milano, Italy.
  • Iucci G; Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy.
  • Venditti I; Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy.
  • Meneghini C; Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy.
  • Corsi I; Department of Physical, Earth and Environmental Sciences, University of Siena, 53100 Siena, Italy.
  • Khalakhan I; Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holesovickách 2, 18000 Prague, Czech Republic.
  • Nicastro G; Department of Chemistry, Materials, and Chemical Engineering "G. Natta", Politecnico di Milano and INSTM Local Unit, Via Mancinelli 7, 20131 Milano, Italy.
  • Punta C; Department of Chemistry, Materials, and Chemical Engineering "G. Natta", Politecnico di Milano and INSTM Local Unit, Via Mancinelli 7, 20131 Milano, Italy.
  • Battocchio C; Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy.
ACS Appl Nano Mater ; 7(2): 2401-2413, 2024 Jan 26.
Article em En | MEDLINE | ID: mdl-38298253
ABSTRACT
Nanocellulose constitutes a sustainable and biobased solution both as an efficient sorbent material for water treatment and as support for other inorganic nanomaterials with sorbent properties. Herein, we report the synthesis of a nanocomposite by deposition of in situ-generated silver nanoparticles (AgNPs) onto TEMPO-oxidized cellulose nanofibers (TOCNFs). Following an in-depth analytical investigation, we unveil for the first time the key role of AgNPs in enhancing the adsorption efficiency of TOCNF toward Cd2+ ions, chosen as model heavy metal contaminants. The obtained nanocomposite shows a value of Cd2+ sorption capacity at equilibrium from 150 mg L-1 ion aqueous solutions of ∼116 mg g-1 against the value of 78 mg g-1 measured for TOCNF alone. A combination of field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray (EDX), and X-ray photoelectron spectroscopy (XPS) analyses suggests that Cd2+ ions are mainly adsorbed in the neighborhood of AgNPs. However, XPS characterization allows us to conclude that the role of AgNPs relies on increasing the exposure of carboxylic groups with respect to the original TOCNF, suggesting that these groups are still responsible for absorption. In fact, X-ray absorption spectroscopy (XAS) analysis of the Cd-K edge excludes a direct interaction between Ag0 and Cd2+, supporting the XPS results and confirming the coordination of the latter with carboxyl groups.

Texto completo: 1 Bases de dados: MEDLINE Idioma: En Revista: ACS Appl Nano Mater Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Itália

Texto completo: 1 Bases de dados: MEDLINE Idioma: En Revista: ACS Appl Nano Mater Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Itália