One-pot, aqueous-phase synthesis of graphene oxide functionalized with heterocyclic groups to give increased solubility in organic solvents

Abstract

An easy and versatile method for the covalent functionalization of graphene oxide (GO) is reported. The functionalized GO is synthesized by a polyphosphoric acid-catalyzed cyclization reaction of the carboxylic groups on GO with the hydroxyl and amino groups on o-aminophenol and o-phenylenediamine, resulting in it being well dispersed in many organic solvents. The results may provide a way to extend the use of GO as a functional material in electronic devices and high performance structural materials.

Dioxomolybdenum(VI) complex covalently attached to amino‐modified graphene oxide: heterogeneous catalyst for the epoxidation of alkenes

“…However, I D / I G (the Raman intensity ratio of D and G bands) is a little different. Compared with GO (1.10), MoO 2 –salen–GO gives a slightly high ratio of I D / I G (1.13), indicating that the size of the in‐plane sp 2 domains decreases and the covalent attachment of dioxomolybdenum(VI) salen to GO by a stepwise procedure causes some defects or deoxygenation …”

Nitrogen and Sulfur Codoped Graphene: Multifunctional Electrode Materials for High‐Performance Li‐Ion Batteries and Oxygen Reduction Reaction

“…Synthesis of GO : GO was synthesized from natural graphite by a modified Hummers' method, which has been reported previously …”

Synergetic effect of synthesized sulfonated polyaniline/quaternized graphene and its application as a high-performance supercapacitor electrode

“…The peak at 10.8°corresponds to the (001) plane with an interlayer distance of 8.18 Å , which is due to the presence of functional groups on the graphene sheets. A (002) peak at 25.8°indicates that restacking of the graphene due to functionalization process [35]. For q-graphene, the (001) peak of the larger interlayer distance disappeared completely and only the abroad (002) peak at 26°, which corresponds to an interlayer distance of 8.18 Å are observed.…”