Functionalized reduced graphene oxide with tunable band gap and good solubility in organic solvents

Méndez‐Romero, Ulises A.; Pérez‐García, Sergio Alfonso; Xu, Xiaofeng; Wang, Ergang; Licea‐Jiménez, Liliana

doi:10.1016/j.carbon.2019.02.023

Cited by 60 publications

(30 citation statements)

References 49 publications

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“…The HOMO-LUMO values obtained from eqn (2) and (3), are À6.6 eV and À4.2 eV respectively, being 2.5 eV the electronic band gap (E CV g ), in accordance to previously reported values. 8,30,31,40,43 These values measured by CV show differences compared to the E opt g obtained from UV-Vis data. This difference has been attributed to the intrinsic nature of the methods per se used for the measurements, as previously reported, 42…”

Section: Electronic Features: Homo-lumo Levels and Electronic Band Gapmentioning

confidence: 57%

“…The GO synthesis was performed from GNPs by a modied Hummers' method as reported elsewhere. 5,8,35 Briey, 0.5 g of GNPs were oxidized in 30 mL of H 2 SO 4 and 0.295 g of KNO 3 with 3 g of KMnO 4 to achieve formation of Mn 2 O 7 complex. The reaction was carried out for 6 hours, stirring the solution at 450 rpm controlling the temperature below 15 C. The reaction was quenched with 100 mL of DI H 2 O and 6 mL of H 2 O 2 30%.…”

Section: Graphene Oxide Synthesismentioning

confidence: 99%

“…† As one can see, the lateral size acquired from the STEM are similar from the values obtained by DLS, presented in Table 1, which is in agreement from previous works. 8,12,14,29 The average size obtained by DLS, is shown in the Table 1, and the complete information from the technique can be found in Fig. S2 in the ESI.…”

Section: Lateral Size Determinationmentioning

confidence: 99%

“…9), are the more relevant section. The HOMO and LUMO values were calculated with reference against ferrocene using the following equations: 8,42 E HOMO ¼ À(E ox + 5.13) eV…”

Section: Electronic Features: Homo-lumo Levels and Electronic Band Gapmentioning

confidence: 99%

“…In this context, the rGO synthesis through GO as an intermediate has several advantages, being the two most important: scalability 3 and simple further chemical modication ability of GO to obtain functional rGO, 6,7 for even wider range of properties and applications than pure graphene. 8 In this regard, it is also important to point out the two most signicant GO parameters such as: (i) lateral size, and (ii) oxidation degree (C/O ratio). It has been reported that GO lateral dimensions around 100 nm improves signicantly its stability.…”

Section: Introductionmentioning

confidence: 99%

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Lateral size reduction of graphene oxide preserving its electronic properties and chemical functionality

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Section: Electronic Features: Homo-lumo Levels and Electronic Band Gapmentioning

confidence: 57%

Section: Graphene Oxide Synthesismentioning

confidence: 99%

Section: Lateral Size Determinationmentioning

confidence: 99%

“…9), are the more relevant section. The HOMO and LUMO values were calculated with reference against ferrocene using the following equations: 8,42 E HOMO ¼ À(E ox + 5.13) eV…”

Section: Electronic Features: Homo-lumo Levels and Electronic Band Gapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lateral size reduction of graphene oxide preserving its electronic properties and chemical functionality

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Mass Production of 2D Manifolds of Graphene Oxide by Shear Flow

Choi

Park

Shim

et al. 2021

Adv Funct Materials

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Self-organizing 2D sheets into a 3D structure with a well-defined arrangement and tuned bandgap has garnered significant interest. However, there exist challenges such as scalable and feasible synthetic methods and preservation of 2D properties while preventing re-stacking. Herein, a facile method for the mass production of 2D manifolds of graphene oxide (GO), which are 3D microtubes, while maintaining their 2D properties by applying shear to roll up GO sheets, is reported. The GO mesotubes are formed by shear flow in aluminum-glass parallel plates. Redox reaction plays a vital role during the formation of GO mesotubes by the vorticity alignment during slow shear flow. A high yield of 94% is achieved at an initial pH of 2.2. The maximum d-spacing of the GO sheet in the tube wall is 21 nm, indicating no re-stacking of the graphitic structure. It is demonstrated that the GO mesotubes behaves like a soft gel, rendering them a candidate material for soft robotics, e-skins, and a visible light sensor owing to their reduced optical bandgap.

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Carbon‐Hybridized Hydroxides for Energy Conversion and Storage: Interface Chemistry and Manufacturing

Xie

Chen

et al. 2023

Advanced Materials

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Carbon‐hybridized hydroxides (CHHs) have been intensively investigated for uses in the energy conversion/storage fields. Nevertheless, the intrinsic structure–activity relationships between carbon and hydroxides within CHHs are still blurry, which hinders the fine modulation of CHHs in terms of practical applications to some degree. This review aims to figure out the intrinsic role of carbon materials in CHHs with a focus on the interface chemistry and the engineering strategy in‐between two components. The fundamental effects of the carbon materials in enhancing the charge/mass transfer kinetics are first analyzed, particularly the extra electron pathways for fast charge transfer and the anchoring sites for boosting the mass transfer. Subsequently, the surface‐guided/confined effects of carbon materials in CHHs to modify the morphology and tailor the hydroxides, and functional heterojunction for regulating the inner electronic structure are decoupled. The methods to efficiently construct a stable yet robust solid–solid heterointerface are summarized, including oxygen functional groups engrafting, topological defective sites construction and heteroatom incorporation to activate the inert carbon surface. The smart CHHs in some typical energy applications are demonstrated. Additionally, the methodologies that can reveal the hybridization electron configuration between two components are summed up. At last, the perspective and challenges faced by the CHHs for energy‐related applications are outlined.

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Functionalized reduced graphene oxide with tunable band gap and good solubility in organic solvents

Cited by 60 publications

References 49 publications

Lateral size reduction of graphene oxide preserving its electronic properties and chemical functionality

Lateral size reduction of graphene oxide preserving its electronic properties and chemical functionality

Mass Production of 2D Manifolds of Graphene Oxide by Shear Flow

Carbon‐Hybridized Hydroxides for Energy Conversion and Storage: Interface Chemistry and Manufacturing

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