Tuning of graphene oxide composition by multiple oxidations for carbon dioxide storage and capture of toxic metals

Nováček, Michal; Jankovský, Ondřej; Luxa, Jan; Sedmidubský, David; Pumera, Martin; Fíla, Vlastimil; Lhotka, Miloslav; Klímová, Kateřina; Matějková, Stanislava; Sofer, Zdeněk

doi:10.1039/c6ta03631g

Cited by 97 publications

(38 citation statements)

References 34 publications

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“…According to XPS data, the carbon content in GO is typically between 65-75%, while in CNDs the carbon content is between 55-75%, but values differ depending on the analysis methods and preparation routes used. 33,34 The remaining elemental fraction includes functional groups like hydroxyls, carboxylates, and/or epoxides attached to the carbon skeleton. Depending on the synthesis method for CNDs, nitrogen-containing functional groups like amines and amides may also be present.…”

Section: Introductionmentioning

confidence: 99%

Patching laser-reduced graphene oxide with carbon nanodots

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Patching laser-reduced graphene oxide with carbon nanodots

et al. 2019

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“…Subsequently, the GO species was generated with the formula C 10 O 1 OH 1 COOH 0.5 , meaning that for every twenty carbon atoms present in the pristine graphene layer, one carboxyl group was added on the edges, and for every ten carbon atoms present in the pristine graphene layer, one epoxy and one hydroxyl group were added on the surface of the new GO layer. The formula reflects a typical and likely outcome of the oxidation process [19], leading to a C/O ratio of 1.9, making it compatible with GO flakes synthesized through a modified Hummer's oxidation method [20]. A total of 988 carbon atoms formed the graphene layer, and 487 atoms formed the functional groups.…”

Section: Generation Of the Graphene Topologiesmentioning

confidence: 92%

Molecular Dynamics Simulations of DNA Adsorption on Graphene Oxide and Reduced Graphene Oxide-PEG-NH2 in the Presence of Mg2+ and Cl− ions

et al. 2020

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Graphene and its functionalised derivatives are transforming the development of biosensors that are capable of detecting nucleic acid hybridization. Using a Molecular Dynamics (MD) approach, we explored single-stranded or double-stranded deoxyribose nucleic acid (ssDNA or dsDNA) adsorption on two graphenic species: graphene oxide (GO) and reduced graphene oxide functionalized with aminated polyethylene glycol (rGO-PEG-NH2). Innovatively, we included chloride (Cl−) and magnesium (Mg2+) ions that influenced both the ssDNA and dsDNA adsorption on GO and rGO-PEG-NH2 surfaces. Unlike Cl−, divalent Mg2+ ions formed bridges between the GO surface and DNA molecules, promoting adsorption through electrostatic interactions. For rGO-PEG-NH2, the Mg2+ ions were repulsed from the graphenic surface. The subsequent ssDNA adsorption, mainly influenced by electrostatic forces and hydrogen bonds, could be supported by π–π stacking interactions that were absent in the case of dsDNA. We provide a novel insight for guiding biosensor development.

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“…For example, the C/O ratios are ca. 1.3, 3.1, 2.2, 2.8, and 1.1 for graphene oxides prepared by Brodie's, Staudenmeier's, Hofmann's, Hummers’ and Tour's methods, respectively . The concentration of oxygen functionalities can be further increased by repeating the oxidation procedure …”

Section: Synthesis Of Graphene Derivativesmentioning

confidence: 99%

Chemistry of Graphene Derivatives: Synthesis, Applications, and Perspectives

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Luxa

Pumera

et al. 2018

Chemistry A European J

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The chemistry of graphene and its derivatives is one of the hottest topics of current material science research. The derivatisation of graphene is based on various approaches, and to date functionalization with halogens, hydrogen, various functional groups containing oxygen, sulfur, nitrogen, phosphorus, boron, and several other elements have been reported. Most of these functionalizations are based on sp hybridization of carbon atoms in the graphene skeleton, which means the formation of out-of-plane covalent bonds. Several elements were also reported for substitutional modification of graphene, where the carbon atoms are substituted with atoms like nitrogen, boron, and several others. From tens of functional groups, for only two of them were reported full functionalization of graphene skeleton and formation of its stoichiometric counterparts, fluorographene and hydrogenated graphene. The functionalization of graphene is crucial for most of its applications including energy storage and conversion devices, electronic and optic applications, composites, and many others.

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Tuning of graphene oxide composition by multiple oxidations for carbon dioxide storage and capture of toxic metals

Abstract: The chemical composition and properties of graphene oxide can be controlled by multiple oxidations.

Cited by 97 publications

References 34 publications

Patching laser-reduced graphene oxide with carbon nanodots

Patching laser-reduced graphene oxide with carbon nanodots

Molecular Dynamics Simulations of DNA Adsorption on Graphene Oxide and Reduced Graphene Oxide-PEG-NH2 in the Presence of Mg2+ and Cl− ions

Chemistry of Graphene Derivatives: Synthesis, Applications, and Perspectives

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