Mixed sp2–sp3 Nanocarbon Materials: A Status Quo Review

Vejpravová, J.

doi:10.3390/nano11102469

Cited by 35 publications

(28 citation statements)

References 175 publications

(197 reference statements)

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“…Carbon (C) can form different kinds of nanostructures, from fullerene to nanotubes to graphene, which are milestones in the development of nanomaterials and have attracted immense research activities [ 1 , 2 ]. Recently, diamane, the thinnest sp 3 -hybridized diamond film, has attracted much attention due to its outstanding electronic, mechanical, and thermal properties inherited from graphene and diamond [ 3 , 4 , 5 ]. In 2009, Chernozatonskii et al, for the first time, theoretically predicted the diamane properties based on the density functional theory (DFT) calculations, which opens a band gap and exhibits higher stiffness compared to graphene.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Study on the Nanofriction Properties of Diamane: The Thinnest Diamond Film

Wang

et al. 2022

Nanomaterials

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Diamane, the thinnest sp3-hybridized diamond film, has attracted great interest due to its excellent mechanical, electronic, and thermal properties inherited from both graphene and diamond. In this study, the friction properties of surface hydrogenated and fluorinated diamane (H- and F-diamane) are investigated with dispersion-corrected density functional theory (DFT) calculations for the first time. Our calculations show that the F-diamane exhibits approximately equal friction to graphene, despite the presence of morphological corrugation induced by sp3 hybridization. Comparative studies have found that the coefficient of friction of H-diamane is about twice that of F-diamane, although they have the same surface geometric folds. These results are attributed to the packed charge surface of F-diamane, which can not only effectively shield carbon interactions from two contacting films, but also provide strong electron–electron repulsive interaction, resulting in a large interlayer distance and a small wrinkle of potential energy at the interface. The interesting results obtained in this study have enriched our understanding of the tribological properties of diamane, and are the tribological basis for the design and application of diamane in nanodevices.

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Section: Introductionmentioning

confidence: 99%

First-Principles Study on the Nanofriction Properties of Diamane: The Thinnest Diamond Film

Wang

et al. 2022

Nanomaterials

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“…Carbon materials rich in sp 2 content is related to graphitic stacking, while sp 3 is related to carbon structures with no layers, disordered and amorphous [ 47 ]. The sp 2 –sp 3 hybridization state are important parameters governing the final anode materials’ stability, reactivity, and physical properties [ 48 ]. Lu et al, [ 46 ] employed an anode based on dodecahedral carbon framework, and studied the level of its electronic structure (sp 2 /sp 3 hybridized orbital) on their corresponding Li-ion storage performances.…”

Section: Effect Of Preparation Conditions On Biochar Physicochemical ...mentioning

confidence: 99%

Sustainable Biomass-Derived Carbon Electrodes for Potassium and Aluminum Batteries: Conceptualizing the Key Parameters for Improved Performance

et al. 2023

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The development of sustainable, safe, low-cost, high energy and density power-density energy storage devices is most needed to electrify our modern needs to reach a carbon-neutral society by ~2050. Batteries are the backbones of future sustainable energy sources for both stationary off-grid and mobile plug-in electric vehicle applications. Biomass-derived carbon materials are extensively researched as efficient and sustainable electrode/anode candidates for lithium/ sodium-ion chemistries due to their well-developed tailored textures (closed pores and defects) and large microcrystalline interlayer spacing and therefore opens-up their potential applications in sustainable potassium and aluminum batteries. The main purpose of this perspective is to brief the use of biomass residues for the preparation of carbon electrodes for potassium and aluminum batteries annexed to the biomass-derived carbon physicochemical structures and their aligned electrochemical properties. In addition, we presented an outlook as well as some challenges faced in this promising area of research. We believe that this review enlightens the readers with useful insights and a reasonable understanding of issues and challenges faced in the preparation, physicochemical properties and application of biomass-derived carbon materials as anodes and cathode candidates for potassium and aluminum batteries, respectively. In addition, this review can further help material scientists to seek out novel electrode materials from different types of biomasses, which opens up new avenues in the fabrication/development of next-generation sustainable and high-energy density batteries.

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“…Therefore, carbon core is generally broadly defined as carbon nanoparticles containing sp 2− /sp 3− hybrid carbon structure or embedded sp 2− conjugated structure in amorphous carbons. At present, more attention is paid to the size effect of sp 2 conjugate system [39,40].…”

Section: Structure Of Cdsmentioning

confidence: 99%

The advanced multi-functional carbon dots in photoelectrochemistry based energy conversion

Zhou

Liao

Liu

et al. 2022

Int. J. Extrem. Manuf.

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Carbon dots (CDs), as a unique zero-dimensional member of carbon materials, have attracted numerous attentions for their potential applications in optoelectronic, biological, and energy related fields. Recently, CDs as catalysts for energy conversion reactions under multi-physical conditions such as light and/or electricity have grown into a research frontier due to their advantages of high visible light utilization, fast migration of charge carriers, efficient surface redox reactions and good electrical conductivity. In this review, we summarize the fabrication methods of CDs and corresponding CD nanocomposites, including the strategies of surface modification and heteroatom doping. The properties of CDs that concerned to the photo- and electro-catalysis are highlighted and detailed corresponding applications are listed. More importantly, as new non-contact detection technologies, transient photo-induced voltage/current (TPV/TPC) have been developed to detect and study the charge transfer kinetics, which can sensitively reflect the complex electron separation and transfer behavior in photo- / electro-catalysts. The development and application of the techniques are reviewed. Finally, we discuss and outline the major challenges and opportunities for future CD-based catalysts, and the needs and expectations for the development of novel characterization technologies.

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Mixed sp2–sp3 Nanocarbon Materials: A Status Quo Review

Cited by 35 publications

References 175 publications

First-Principles Study on the Nanofriction Properties of Diamane: The Thinnest Diamond Film

First-Principles Study on the Nanofriction Properties of Diamane: The Thinnest Diamond Film

Sustainable Biomass-Derived Carbon Electrodes for Potassium and Aluminum Batteries: Conceptualizing the Key Parameters for Improved Performance

The advanced multi-functional carbon dots in photoelectrochemistry based energy conversion

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