Optimization of graphene oxide through various Hummers' methods and comparative reduction using green approach

Olorunkosebi, Allen Abiodun; Eleruja, Marcus Adebola; Adedeji, Adetayo; Olofinjana, Bolutife; Fasakin, Oladepo; Omotoso, Ezekiel; Oyedotun, Kabir O.; Ajayi, E. O. B.; Manyala, Ncholu I.

doi:10.1016/j.diamond.2021.108456

Cited by 40 publications

(8 citation statements)

References 50 publications

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“…In this study, the GO was synthesized from pure graphite using a modified Hummers method as a green approach to prevent the release of toxic gases [ 90 , 91 , 92 ]. The surface morphology and properties of GO were studied using TEM, AFM, FTIR, and Raman spectroscopy.…”

Section: Resultsmentioning

confidence: 99%

PCL/Gelatin/Graphene Oxide Electrospun Nanofibers: Effect of Surface Functionalization on In Vitro and Antibacterial Response

et al. 2023

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The emergence of resistance to pathogenic bacteria has resulted from the misuse of antibiotics used in wound treatment. Therefore, nanomaterial-based agents can be used to overcome these limitations. In this study, polycaprolactone (PCL)/gelatin/graphene oxide electrospun nanofibers (PGO) are functionalized via plasma treatment with the monomeric groups diallylamine (PGO-M1), acrylic acid (PGO-M2), and tert-butyl acrylate (PGO-M3) to enhance the action against bacteria cells. The surface functionalization influences the morphology, surface wettability, mechanical properties, and thermal stability of PGO nanofibers. PGO-M1 and PGO-M2 exhibit good antibacterial activity against Staphylococcus aureus and Escherichia coli, whereas PGO-M3 tends to reduce their antibacterial properties compared to PGO nanofibers. The highest proportion of dead bacteria cells is found on the surface of hydrophilic PGO-M1, whereas live cells are colonized on the surface of hydrophobic PGO-M3. Likewise, PGO-M1 shows a good interaction with L929, which is confirmed by the high levels of adhesion and proliferation with respect to the control. All the results confirm that surface functionalization can be strategically used as a tool to engineer PGO nanofibers with controlled antibacterial properties for the fabrication of highly versatile devices suitable for different applications (e.g., health, environmental pollution).

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Section: Resultsmentioning

confidence: 99%

PCL/Gelatin/Graphene Oxide Electrospun Nanofibers: Effect of Surface Functionalization on In Vitro and Antibacterial Response

et al. 2023

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“…The reduced graphene oxide obtained by reduction using pumpkin leaves and neem extract have been previously reported in our previous study. 30 For methionine reduced graphene oxide, the required amount of dl -methionine was put into GO aqueous suspension according to Table 1. The mixture was kept in a sealed glass bottle and stirred continuously for 24 hours at 30 °C.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Surface morphology of reduced graphene oxides (rGO) in Fig. 6(ac), show surfaces that were more rened and smother than GOs 30 with sharp edges that conrmed that graphene oxide has been reduced. The morphology shows that it is well rened and smoother in variants of GOs reduced by methionine unlike previously reported rGO reduced by neem and pumpkin extract 30 and those reduced by hydrazine and hydrothermal method.…”

Section: Scanning Electron Microscopy Analyses Of Mrgomentioning

confidence: 99%

“…6(ac), show surfaces that were more rened and smother than GOs 30 with sharp edges that conrmed that graphene oxide has been reduced. The morphology shows that it is well rened and smoother in variants of GOs reduced by methionine unlike previously reported rGO reduced by neem and pumpkin extract 30 and those reduced by hydrazine and hydrothermal method. 2, the lower the value of O/C ratio, the greater the reduction efficiency of the reduced graphene oxide.…”

Section: Scanning Electron Microscopy Analyses Of Mrgomentioning

confidence: 99%

“…2 Experimental method 2.1 Synthesis of graphene oxide (GO) GOs were synthesized from graphite akes using: modied Hummers' method (GO-12H), modied Hummers' method without phosphoric acid (GO-NP) and simplied Hummers' method (GO-SIM) as previously reported by Olorunkosebi et al 30…”

Section: Introductionmentioning

confidence: 99%

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Comparative investigation of gas sensing performance of liquefied petroleum gas using green reduced graphene oxide-based sensors

et al. 2023

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Preparation of a fluorescent composite coating and its anticorrosive and indicative performance

Zhang

Wang

et al. 2023

J Chinese Chemical Soc

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ObjectiveA novel fluorescent composite anti‐corrosion coating was prepared, which could simultaneously indicate corrosion sites and corrosion degree according to change of fluorescence intensity.MethodsTri‐HDI/GO/SR/AP coating was prepared by blending method. Its structure, physical properties, anti‐corrosion ability and fluorescence intensity were analyzed.ResultsTri‐HDI/GO/SR/AP coating was not significantly damaged during the corrosion simulation experiment. The fluorescence intensity of the coating decreased with the increase of corrosion degree.ConclusionsBased on structure characterization and electrochemical analysis, it is found that Tri‐HDI/GO/SR/AP coating has positive anti‐corrosion performance. Fluorescence molecules undergo a quenching reaction when corrosion occurs, the corrosion location and corrosion degree can be determined according to the changes of luminescence intensity.

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Optimization of graphene oxide through various Hummers' methods and comparative reduction using green approach

Cited by 40 publications

References 50 publications

PCL/Gelatin/Graphene Oxide Electrospun Nanofibers: Effect of Surface Functionalization on In Vitro and Antibacterial Response

PCL/Gelatin/Graphene Oxide Electrospun Nanofibers: Effect of Surface Functionalization on In Vitro and Antibacterial Response

Comparative investigation of gas sensing performance of liquefied petroleum gas using green reduced graphene oxide-based sensors

Preparation of a fluorescent composite coating and its anticorrosive and indicative performance

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