ESIX materials: insertion chemistry from a wide perspective

Sciacca, Rosalinda (2022) ESIX materials: insertion chemistry from a wide perspective, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Chimica, 34 Ciclo.
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This thesis aim is the synthesis, characterization and ESIX proprieties studies of Prussian Blue analogues (or Metal Hexacyanometallates, MHCMs). They are distinguished by the generic formula AxMy[B(CN)6].mH2O where, x, y, and m indicate stoichiometric coefficients, M and B are transition metals and A an alkaline metal cation. Prussian Blue (PB) analogues materials exhibit excellent physicochemical characteristics as ionic sieve. Moreover, their face-centered cubic crystal structure and the possibility to change the transition metal leads them to be an extremely versatile compound, in terms of synthesis and applications. Properties and structures of these synthetized compounds, are investigated by using a multi-technique approach including X-ray Powder Diffraction (XRD), Scanning Electron Microscopy (SEM), Infrared Spectroscopy (IR) and electrochemical measurements. They were obtained both via electrochemical and chemical synthesis on the basis of the application field. The main topic is related to the MHCFs release/uptake capabilities, specifically associated to structural changing. Furthermore, their environmental sustainability and their wide field of application from sensing to batteries, allow to define them as innovative materials suitable for new analytical technologies. Finally, the synthesis and characterization of green rust thin film is deepened, highlighting the electrochemical behavior of Akaganèite, which has a key role in the corrosion progress. Thus, understanding the electrochemical reaction involved in the corrosion processes, is useful for the diagnosis and prevention of artefacts. Also, VIMP technique allows to compare the controlled- electrodeposited green rust electrochemical behaviour with the real sample one.

Tipologia del documento
Tesi di dottorato
Sciacca, Rosalinda
Dottorato di ricerca
Settore disciplinare
Settore concorsuale
Parole chiave
ESIX materials; Prussian blue analogues; ion-exchange; batteries; rare earth elements; green rust; akaganeite.
Data di discussione
24 Marzo 2022

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