Surface modifications and analytical applications of graphene oxide: A review

Functional groups in graphene oxide

“…There have been several discussions on the combination of both covalent and non-covalent modification of graphene (oxide) particles. 27–29 This critical review will bundle the knowledge of the functionalities of GO and their role in further chemical modifications for extended applications. Specifically, a brief discussion on the synthesis, structure and surface chemistry of GO is presented.…”

Cross-linked graphene oxide framework to enhance pervaporation separate property of waterborne polyurethane in food packaging materials

“…Graphene oxide (GO) was synthesized by a modified Hummers method (Joshi et al, 2021) 0.1 mol/L ethylenediamine (EDA), 0.1 mol/L p-phenylenediamine (PPD), and 0.1 mol/L o-phenylenediamine (OPD) was mixed with 0.25 mg/mL GO solution at equal volume at room temperature respectively, and magnetically stir for 0.5 h. After centrifuged and washed with deionized water for several times to remove unreacted components, the filtered were dried under vacuum at 60 °C to obtain three reduced GO (rGO) powders GO-EDA, GO-OPD, GO -PPD.…”

A highly dispersed magnetic polymetallic catalyst to activate peroxymonosulfate for the degradation of organic pollutants in wastewater

“…Graphene oxides (GOs) with a high specific surface area 2630 m 2 g −1 and abundant reactive oxygen functional groups have become promising candidates for a variety of applications such as flexible sensors, solar cells, supercapacitors and nanomedicine. 26 However, previous reports have indicated that GOs manifested poor catalytic activities toward PMS due to their zero band-gap. 27 The chemical doping process has been proven to be an excellent strategy to improve the catalytic activity of GOs, as it can weaken the O–O band of GOs, tailor the electron states (charge or/and spin density) within the graphene basal plane and create new active sites.…”