Since its discovery in 2004, thanks to its unique properties, graphene is considered one of the most intriguing materials. Besides its many benefits, it displays three major drawbacks: its synthetic pathways are not suitable for scalable quantities of products; it is poorly dispersible in water and its functionalization reactions are limited.[1] It is possible to produce a graphene-like material in scalable quantities by exploiting the oxidation and the further reduction of graphite. The product of this reaction is reduced graphene oxide (rGO), a nanomaterial with similar properties to graphene. The reaction introduces a series of defects on the carbon frame and a small quantity of oxygenated functional groups (OFGs), mostly: hydroxyls, epoxides, carbonyls and carboxyls.[2] The intermediate of this reaction, graphene oxide (GO) offers the possibility to tune its chemical properties by exploiting the reactivity of its OFGs with a series of functionalization reactions. These reactions can lead to a standalone material or could be part of synthetic pathways which can pave the way to rGO applications in many fields.[3] The aim of this study is to investigate the chemistry of graphene oxide through a novel carboxylation reaction, followed by a mild reduction. The reaction outcome is a novel mildly reduced and carboxylated form of GO, which can be considered as a water dispersible form of graphene (or rGO). This material constitutes a suitable platform for further reactions leading to hybrid architectures to be applied in many different fields. The evolution of the system through the different reaction stages has been characterized step-by-step via XPS and UV-Vis spectroscopy. [1] C. Anichini, P. Samorì, Small, 2021, 17, 2100514. [2] D. C. Marcano, D. V. Kosynkin, J. M. Berlin, A. Sinitskii, Z. Sun, A. Slesarev, L. B. Alemany, W. Lu, J. M. Tour, ACS NANO, 2010, 4, 8. [3] S. Guo, S. Garaj, A. Bianco, C. Ménard-Moyon, Nature Reviews Physics, 2022, 4, 247-262
A synthetic route to soluble reduced graphene oxide via one pot carboxyl enrichment / Giaccari, Leonardo; Amato, Francesco; Motta, Alessandro; Zanoni, Robertino; Marrani, Andrea Giacomo. - (2022). (Intervento presentato al convegno XLVIII Congresso Nazionale di Chimica Inorganica, INORG2022 tenutosi a Pisa).
A synthetic route to soluble reduced graphene oxide via one pot carboxyl enrichment
Leonardo Giaccari
;Francesco Amato;Alessandro Motta;Robertino Zanoni;Andrea Giacomo Marrani
2022
Abstract
Since its discovery in 2004, thanks to its unique properties, graphene is considered one of the most intriguing materials. Besides its many benefits, it displays three major drawbacks: its synthetic pathways are not suitable for scalable quantities of products; it is poorly dispersible in water and its functionalization reactions are limited.[1] It is possible to produce a graphene-like material in scalable quantities by exploiting the oxidation and the further reduction of graphite. The product of this reaction is reduced graphene oxide (rGO), a nanomaterial with similar properties to graphene. The reaction introduces a series of defects on the carbon frame and a small quantity of oxygenated functional groups (OFGs), mostly: hydroxyls, epoxides, carbonyls and carboxyls.[2] The intermediate of this reaction, graphene oxide (GO) offers the possibility to tune its chemical properties by exploiting the reactivity of its OFGs with a series of functionalization reactions. These reactions can lead to a standalone material or could be part of synthetic pathways which can pave the way to rGO applications in many fields.[3] The aim of this study is to investigate the chemistry of graphene oxide through a novel carboxylation reaction, followed by a mild reduction. The reaction outcome is a novel mildly reduced and carboxylated form of GO, which can be considered as a water dispersible form of graphene (or rGO). This material constitutes a suitable platform for further reactions leading to hybrid architectures to be applied in many different fields. The evolution of the system through the different reaction stages has been characterized step-by-step via XPS and UV-Vis spectroscopy. [1] C. Anichini, P. Samorì, Small, 2021, 17, 2100514. [2] D. C. Marcano, D. V. Kosynkin, J. M. Berlin, A. Sinitskii, Z. Sun, A. Slesarev, L. B. Alemany, W. Lu, J. M. Tour, ACS NANO, 2010, 4, 8. [3] S. Guo, S. Garaj, A. Bianco, C. Ménard-Moyon, Nature Reviews Physics, 2022, 4, 247-262I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
