Reduced graphene oxide produced by chemical and hydrothermal methods

Jose, Priya Parvathi Ameena; Kala, M. S.; Kalarikkal, Nandakumar; Thomas, Sabu

doi:10.1016/j.matpr.2018.05.124

Cited by 31 publications

(17 citation statements)

References 48 publications

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“…However, after modification with dopamine, A new broad diffraction peak at 23.5 • can be observed for the resultant nano-PDA@GO-TiO 2 composites, which was due to the stacking of the benzene rings of PDA molecules, demonstrates that the DA has successfully self-polymerized on the GO [38]. The reduction of GO by DA modified is also established by the appearance of broad peak observed in the region (22 • -38 • ) and the disappearance of the peak at 12.32 • in nano-PDA@GO-TiO 2 composites of XRD [34,39]. At the same time, the spectrum of XRD for nano-PDA@GO-TiO 2 composites was similar to nano-TiO 2 .…”

Section: Xrd Patternsmentioning

confidence: 78%

Polydopamine Modified Graphene Oxide-TiO2 Nanofiller for Reinforcing Physical Properties and Anticorrosion Performance of Waterborne Epoxy Coatings

et al. 2019

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Nano-polydopamine-graphene oxide-TiO2 (nano-PDA@GO-TiO2) composites were prepared by dopamine modified graphene oxide (GO) and loaded nano-TiO2 on the surface of GO. The structure and morphology of nano-PDA@GO-TiO2 composites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman, X-ray photoelectron spectroscopy (XPS), Scanning electron microscope (SEM), and Transmission electron microscope (TEM) Results demonstrate that the introduction of dopamine to functionalize the GO could self-polymerize polydopamine (PDA) on the surfaces of the GO and endow abundant chemical groups reduce the GO. The interaction between the GO and nano-TiO2 particles could prevent graphene nanosheets from restacking and nano-TiO2 particles from agglomeration. Nano-PDA@GO-TiO2 composite material was used as the nano-filler, and nano-PDA@GO-TiO2 composites waterborne epoxy resin coatings (PGT/WEP) were prepared by dispersing a different content of nano-PDA@GO-TiO2 composites into waterborne epoxy resin with the help of ultrasonic dispersion and mechanical agitation. The physical properties of PGT/WEP coatings, such as hardness, impact resistance, and adhesion, were tested and the electrochemical performance was evaluated. The results show that dispersing 2% nano-PDA@GO-TiO2 composites in waterborne epoxy resin could significantly improve the physical properties and corrosion resistance of waterborne epoxy resin coating when compared with pure waterborne epoxy coating.

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Section: Xrd Patternsmentioning

confidence: 78%

Polydopamine Modified Graphene Oxide-TiO2 Nanofiller for Reinforcing Physical Properties and Anticorrosion Performance of Waterborne Epoxy Coatings

et al. 2019

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“…Graphene oxide (GO) was synthesized by using modified Hummer's method with our modification as described in previous work 41 . The reduced graphene oxide (rGO) was obtained by chemically reducing the as‐prepared GO using NaBH 4 according to the procedure of Jose et al 42 …”

Section: Methodsmentioning

confidence: 99%

Effects of different graphene‐based nanomaterials as elicitors on growth and ganoderic acid production by Ganoderma lucidum

Rostami

Yazdian

Mirjani

et al. 2020

Biotechnology Progress

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Graphene-based nanomaterials (GBNs) have attracted considerable interest nowadays due to their wide range of applications. However, very little attention has been paid to the application of nanomaterials as potential elicitors for production of valuable metabolites. Herein, aiming to earn insight into effects of nanomaterials on secondary metabolite biosynthesis by medicinal fungi, we evaluated the influence of GBNs on growth and production of ganoderic acid (GA) by Ganoderma lucidum in submerged culture. Graphene oxide (GO), reduced graphene oxide (rGO), and rGO/Fe 3 O 4 nanocomposite were synthesized successfully and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy analysis. The prepared nanomaterials were added to the culture of G. lucidum at final concentrations of 50, 100, and 150 mg/L on Day 5. The results showed that the elicitation of G. lucidum with GO and rGO decreased the cell dry weight and GA production slightly, especially in higher concentrations. However, rGO/Fe 3 O 4 nanocomposite not negatively affected cell growth and improved GA production. G. lucidum growth rate responded to elicitation experiments differently and depended on the type of nanomaterials and their concentrations, but almost all GBNs caused an increase in GA content (mg/100 mg dry weight). Also, field emission scanning electron microscopy morphological study showed that under elicitation, mycelia were more condensed and tightly stacked together. The findings from this study may suggest that GBNs in low concentrations could be applied as elicitors to secondary metabolites production from higher fungus, but further environmental, physiological, and biological studies required.

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“…Therefore, it becomes very significant to explore an efficient and environmentally friendly technique to prepare reduced graphene oxide. At present, several new reductants including vitamin C, hydrohalic acids, Sodium borohydride, grape seed extract, and new reduction routes, such as hydrothermal, photocatalytic reduction, photothermally reduced, flash reduction have been developed [15][16][17][18]. Among all the strategies developed, photocatalytic reduction has attracted more attention because of its many advantages, such as safety, eco-friendly, easy-operation and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic reduction of graphene oxide with cuprous oxide film under UV-vis irradiation

Wang

Feng

Jin

et al. 2020

Reviews on Advanced Materials Science

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AbstractWe have grown Cu2O films by different routes including self-oxidation and metal-organic deposition (MOD). The reduction efficiency of Cu2O films on graphene oxide (GO) synthesized by modified Hummer’s method has been studied. Surface morphology and chemical state of as-prepared Cu2O film and GO sheets reduced at different conditions have also been investigated using atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS). Results show that self-oxidation Cu2O film is more effective on phtocatalytic reduction of GO than MOD-Cu2O film. Moreover, reduction effect of self-oxidation Cu2O film to GO is comparable to that of environmental-friendly reducing agent of vitamin C. The present results offer a potentially eco-friendly and low-cost approach for the manufacture of reduced graphene oxide (RGO) by photocatalytic reduction.

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Reduced graphene oxide produced by chemical and hydrothermal methods

Cited by 31 publications

References 48 publications

Polydopamine Modified Graphene Oxide-TiO2 Nanofiller for Reinforcing Physical Properties and Anticorrosion Performance of Waterborne Epoxy Coatings

Polydopamine Modified Graphene Oxide-TiO2 Nanofiller for Reinforcing Physical Properties and Anticorrosion Performance of Waterborne Epoxy Coatings

Effects of different graphene‐based nanomaterials as elicitors on growth and ganoderic acid production by Ganoderma lucidum

Photocatalytic reduction of graphene oxide with cuprous oxide film under UV-vis irradiation

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