Graphenes in Heterogeneous Catalysis

Albero, Josep; Garcı́a, Hermenegildo

doi:10.1002/9781118998939.ch3

Cited by 3 publications

(3 citation statements)

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“…Furthermore, its surface area, experimentally measured being as high as 700 m 2 g −1 , [17,18] have made graphene an appealing component for applications in energy [17,[19][20][21] and gas [22][23][24] storage, energy conversion, [17,25] micro-and optoelectronics, [26][27][28][29] as well as in and catalysis. [30,31] Nevertheless, the translation of these outstanding properties, which are observed on lab-scale experiments, into real-world applications on an industrial scale suffers from major drawbacks associated to graphene production.…”

Section: Introductionmentioning

confidence: 99%

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

2016

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Graphene, a one-atom thick two-dimensional (2D) material, is at the core of an ever-growing research effort due to its combination of unique mechanical, thermal, optical and electrical properties. Two strategies are being pursued for the graphene production: the bottom-up and the top-down. The former relies on the use of covalent chemistry approaches on properly designed molecular building blocks undergoing chemical reaction to form 2D covalent networks. The latter occurs via exfoliation of bulk graphite into individual graphene sheets. Amongst the various types of exfoliations exploited so far, ultrasound-induced liquid-phase exfoliation (UILPE) is an attractive strategy, being extremely versatile, up-scalable and applicable to a variety of environments. In this review, we highlight the recent developments that have led to successful non-covalent functionalization of graphene and how the latter can be exploited to promote the process of molecule-assisted UILPE of graphite. The functionalization of graphene with non-covalently interacting molecules, both in dispersions as well as in dry films, represents a promising and modular approach to tune various physical and chemical properties of graphene, eventually conferring to such a 2D system a multifunctional nature.

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Section: Introductionmentioning

confidence: 99%

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

2016

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Section: Introductionmentioning

confidence: 99%

Graphene via Molecule-Assisted Ultrasound-Induced Liquid-Phase Exfoliation: A Supramolecular Approach

Eredia¹,

Ciesielski²,

Samorı́³

2016

Physical Sciences Reviews

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Abstract Graphene is a two-dimensional (2D) material holding unique optical, mechanical, thermal and electrical properties. The combination of these exceptional characteristics makes graphene an ideal model system for fundamental physical and chemical studies as well as technologically ground breaking material for a large range of applications. Graphene can be produced either following a bottom-up or top-down method. The former is based on the formation of covalent networks suitably engineered molecular building blocks undergoing chemical reaction. The latter takes place through the exfoliation of bulk graphite into individual graphene sheets. Among them, ultrasound-induced liquid-phase exfoliation (UILPE) is an appealing method, being very versatile and applicable to different environments and on various substrate types. In this chapter, we describe the recently reported methods to produce graphene via molecule-assisted UILPE of graphite, aiming at the generation of high-quality graphene. In particular, we will focus on the supramolecular approach, which consists in the use of suitably designed organic molecules during the UILPE of graphite. These molecules act as graphene dispersion-stabilizing agents during the exfoliation. This method relying on the joint effect of a solvent and ad hoc molecules to foster the exfoliation of graphite into graphene in liquid environment represents a promising and modular method toward the improvement of the process of UILPE in terms of the concentration and quality of the exfoliated material. Furthermore, exfoliations in aqueous and organic solutions are presented and discussed separately.

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“…In view of its superior characteristics, this wonder material holds potential to influence future emerging technologies, including solar cells [2, 3], light-emitting devices [4], photodetectors [5-8], touch screens [9], spin valves [10,11], ultrafast lasers [12,13] and flexible and wearable electronics [14], to name a few. Moreover, its surface area, quantified experimentally being as high as 2,700 m 2 /g [15,16], has made graphene an attractive system for gas [17][18][19], and energy [15,20,21] storage, (micro-) optoelectronics [22][23][24][25], catalysis [26,27], energy conversion [15], as well as in biological labeling [28].Graphene can be produced and isolated either following the bottom-up or the top-down strategy [29,30]. Graphene can be obtained in very high-quality sheets by exploiting the bottom-up covalent association of small molecular building blocks, undergoing chemical reaction to form 2D networks [31][32][33]; however, the quantity of materials produced with this method is limited.…”

mentioning

confidence: 99%

6. Graphene via Molecule-Assisted Ultrasound- Induced Liquid-Phase Exfoliation: A Supramolecular Approach

Eredia¹,

Ciesielski²,

Samorı́³

2017

Chemistry of Carbon Nanostructures

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Graphene is a two-dimensional (2D) material holding unique optical, mechanical, thermal and electrical properties. The combination of these exceptional characteristics makes graphene an ideal model system for fundamental physical and chemical studies as well as technologically ground breaking material for a large range of applications. Graphene can be produced either following a bottom-up or top-down method. The former is based on the formation of covalent networks suitably engineered molecular building blocks undergoing chemical reaction. The latter takes place through the exfoliation of bulk graphite into individual graphene sheets. Among them, ultrasound-induced liquid-phase exfoliation (UILPE) is an appealing method, being very versatile and applicable to different environments and on various substrate types. In this chapter, we describe the recently reported methods to produce graphene via molecule-assisted UILPE of graphite, aiming at the generation of high-quality graphene. In particular, we will focus on the supramolecular approach, which consists in the use of suitably designed organic molecules during the UILPE of graphite. These molecules act as graphene dispersion-stabilizing agents during the exfoliation. This method relying on the joint effect of a solvent and ad hoc molecules to foster the exfoliation of graphite into graphene in liquid environment represents a promising and modular method toward the improvement of the process of UILPE in terms of the concentration and quality of the exfoliated material. Furthermore, exfoliations in aqueous and organic solutions are presented and discussed separately. IntroductionGraphene, a two-dimensional (2D) honeycomb lattice of carbon atoms, has emerged as a fantastic material possessing outstanding electrical, optical, mechanical and thermal properties [1]. In view of its superior characteristics, this wonder material holds potential to influence future emerging technologies, including solar cells [2, 3], light-emitting devices [4], photodetectors [5-8], touch screens [9], spin valves [10,11], ultrafast lasers [12,13] and flexible and wearable electronics [14], to name a few. Moreover, its surface area, quantified experimentally being as high as 2,700 m 2 /g [15,16], has made graphene an attractive system for gas [17][18][19], and energy [15,20,21] storage, (micro-) optoelectronics [22][23][24][25], catalysis [26,27], energy conversion [15], as well as in biological labeling [28].Graphene can be produced and isolated either following the bottom-up or the top-down strategy [29,30]. Graphene can be obtained in very high-quality sheets by exploiting the bottom-up covalent association of small molecular building blocks, undergoing chemical reaction to form 2D networks [31][32][33]; however, the quantity of materials produced with this method is limited. The growth on (catalytically active) solid surfaces achieved by chemical vapor deposition (CVD) [34,35], or via silicon evaporation from silicon carbide [36], represents alternative bottom-up paths. Top-down appro...

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Graphenes in Heterogeneous Catalysis

Cited by 3 publications

References 67 publications

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

Graphene via Molecule-Assisted Ultrasound-Induced Liquid-Phase Exfoliation: A Supramolecular Approach

6. Graphene via Molecule-Assisted Ultrasound- Induced Liquid-Phase Exfoliation: A Supramolecular Approach

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