Exfoliation of Graphite into Graphene in Polar Solvents Mediated by Amphiphilic Hexa‐<i>peri</i>‐hexabenzocoronene

Kabe, Ryota; Feng, Xinliang; Adachi, Chihaya; Müllen, Kläus

doi:10.1002/asia.201402535

Cited by 16 publications

(11 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In another example, HBC molecules on graphitic substrates were found to have different growth modes such as layer‐by‐layer growth, [272] columns [273] and others. Further application of an HBC carrying a carboxylic group was shown to exfoliate graphite into graphene in polar solvents [274] . This feature was due to the pressence of a hydrophobic aromatic core and a hydrophilic carboxy substituents, installed at the periphery of the aromatic core.…”

Section: Resultsmentioning

confidence: 99%

Coronenes, Benzocoronenes and Beyond: Modern Aspects of Their Syntheses, Properties, and Applications

Kumar

Tao

2021

Chemistry An Asian Journal

View full text Add to dashboard Cite

In recent years, a variety of new designs of coronene‐based polycyclic aromatic hydrocarbons (PAHs) with diverse functions have emerged to serve as complementary materials in organic chemistry and materials chemistry. In the present review, we highlight the modern aspects of syntheses related to or different from the strategies used in the early era of coronene research. Systematic extension and expansion of coronene backbones to wide categories of angular PAHs are covered. The substitution and extension of coronene architectures, by incorporating functional groups and by fusing small and large conjugated units, advatangeously enrich their photophysical, electrochemical, self‐assembling, and other properties, of which are discussed to demostrate their impact in materials chemistry. While the highly symmetric coronenes, tribenzocoronenes and hexabenzocoronenes conceived wide potential in charge‐transporting, electroluminescent, sensing, and other applications, other related derivatives such as dibenzo, tetrabenzo and pentabenzocoronenes also displayed their potentials as exemplified by their use as charge‐conduction channel in transistor application.

show abstract

Section: Resultsmentioning

confidence: 99%

Coronenes, Benzocoronenes and Beyond: Modern Aspects of Their Syntheses, Properties, and Applications

Kumar

Tao

2021

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…Nevertheless, this graphene dispersion led to 20% sedimentation after one week. Recently, we reported the LPE of graphene in polar solvents mediated by a novel water-soluble surfactant consisting of hexa-peri-hexabenzocoronene (HBC) as a hydrophobic aromatic core and hydrophilic carboxy substituents [42]. Resulting from the strong interactions between the large aromatic core and the graphene surface, a graphene dispersion with a concentration of 1.1 mg/mL in methanol containing 2-6 multilayer nanosheets was obtained.…”

Section: Liquid-phase Exfoliation (Lpe)mentioning

confidence: 98%

Exfoliation of graphene via wet chemical routes

et al. 2015

Self Cite

View full text Add to dashboard Cite

a b s t r a c tGraphene is a two-dimensional material that has fascinating electrical and optical properties, and this material has provided chemists with great possibilities and challenges. Interests in graphene's exceptional physical and chemical properties and in its potential for applications have generated thousands of publications and have accelerated the pace of graphene research. Although considerable scientific progress has been achieved, the key to commercializing graphene lies in the cost-effective and scalable production of this material. Graphene can be produced using a variety of wet chemical methods, such as chemical oxidation followed by exfoliation, liquid-phase and electrochemical assisted exfoliation etc. from inexpensive and abundant sources such as graphite. This review article summarizes the recent progress toward the preparation of graphene through wet chemical routes and discusses their remaining challenges. In particular, the quality and yield of graphene sheets produced using these exfoliation protocols will be emphasized.

show abstract

“…Thus, the solution‐phase methods that can produce defect‐free, unoxidized graphene in large scale are highly expected. In a facile and direct manner, graphene nanosheets can be obtained through exfoliating pristine graphite dispersed in ionic liquid, organic solvents, inorganic salts, surfactant solutions, or their mixed‐solvent. For example, Coleman et al successfully demonstrated that graphene dispersions with concentrations up to 0.01 mg mL −1 could be produced by dispersion and exfoliation of graphite in organic solvents such as N ‐methyl‐pyrrolidone due to the matched surface energies of solvent and graphene .…”

Section: Synthesis Of Graphene and Their Composite Photocatalystsmentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

Small

917

401

View full text Add to dashboard Cite

In recent years, heterogeneous photocatalysis has received much research interest because of its powerful potential applications in tackling many important energy and environmental challenges at a global level in an economically sustainable manner. Due to their unique optical, electrical, and physicochemical properties, various 2D graphene nanosheets-supported semiconductor composite photocatalysts have been widely constructed and applied in different photocatalytic fields. In this review, fundamental mechanisms of heterogeneous photocatalysis, including thermodynamic and kinetics requirements, are first systematically summarized. Then, the photocatalysis-related properties of graphene and its derivatives, and design rules and synthesis methods of graphene-based composites are highlighted. Importantly, different design strategies, including doping and sensitization of semiconductors by graphene, improving electrical conductivity of graphene, increasing eloectrocatalytic active sites on graphene, strengthening interface coupling between semiconductors and graphene, fabricating micro/nano architectures, constructing multi-junction nanocomposites, enhancing photostability of semiconductors, and utilizing the synergistic effect of various modification strategies, are thoroughly summarized. The important applications including photocatalytic pollutant degradation, H production, and CO reduction are also addressed. Through reviewing the significant advances on this topic, it may provide new opportunities for designing highly efficient 2D graphene-based photocatalysts for various applications in photocatalysis and other fields, such as solar cells, thermal catalysis, separation, and purification.

show abstract

Exfoliation of Graphite into Graphene in Polar Solvents Mediated by Amphiphilic Hexa‐peri‐hexabenzocoronene

Cited by 16 publications

References 36 publications

Coronenes, Benzocoronenes and Beyond: Modern Aspects of Their Syntheses, Properties, and Applications

Coronenes, Benzocoronenes and Beyond: Modern Aspects of Their Syntheses, Properties, and Applications

Exfoliation of graphene via wet chemical routes

Graphene in Photocatalysis: A Review

Contact Info

Product

Resources

About