Oxidative debris in graphene oxide: a decade of research

Abstract

Graphene oxide (GO) is at the center of a multitude of applications in different fields of nanotechnology. The increasing use of GO has led to its massive commercialization, which requires...

Identifying the Stripping of Oxide Debris from Graphene Oxide: Evidence from Experimental Analysis and Molecular Simulation

“…After standing for 5–180 min, the mixture was stirred, and 10 mL of GO suspension was sampled and filtered with a 0.22 μm PTFE filter membrane. Upon NaOH treatment and filtration, the light-yellow filtrate is where the OD particles are dispersed, and the remaining dark-colored filter residue is the so-called bwGO (base-washing GO) . The fluorescence intensity of the resultant filtrate was measured at an emission wavelength (EM) of 250–550 nm (step size 1 nm, slit 5 nm) and an excitation wavelength (EX) of 200–400 nm (step size 2 nm, slit 5 nm) to determine the stripping intensity of OD. , The stripping pattern of OD from OD was further evidenced using a Bruker BioScope Atomic Force Microscope.…”

“…OD is noncovalently attached to FG via π–π, hydrogen bond, and van der Waals (vdW) interactions, and OD can be stripped from GO by breaking these interactions . The majority of oxygen functionalities on GO actually belong to OD, and removing OD considerably affects the electrical, electrochemical, catalytic, fluorescence, environmental stability, and toxicological properties. ,− …”

Graphene Acetic Acid‐Based Hybrid Supercapacitor and Liquid‐Gated Transistor

“…due to its extensive oxidation. [ 18,19 ] This massive chemical modification determines an abrupt loss of conductivity (i.e., GO is an insulator), but it gains ideal water dispersibility due to the high density of hydrophilic groups. Many physical and chemical processes allow a partial restoration of the sp2‐hybridized carbons, which are responsible for the high conductivity of graphene, thereby leading to reduced graphene oxide (rGO).…”