Graphene oxide–carbon nanotube hybrid assemblies: cooperatively strengthened OH⋯OC hydrogen bonds and the removal of chemisorbed water

Núñez, Jesús David; Benito, Ana M.; Rouzière, Stéphan; Launois, Pascale; Arenal, Raúl; Ajayan, Pulickel M.; Maser, Wolfgang K.

doi:10.1039/c7sc00223h

Cited by 39 publications

(32 citation statements)

References 48 publications

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“…These XRS observations are in agreement with the physical-chemical characterization of the GO papers. Indeed, XPS and TGA results (see supporting information) confirm the removal of OFGs and bound water (Stankovich et al, 2007;Nú ñ ez, 2015;Nú ñ ez et al, 2017) in the temperature range between 403 and 533 K.…”

Section: Thermal Treatment Of Go Papermentioning

confidence: 57%

“…The thermal reduction of GO, which allows tuning of its opto-electronic properties, induces the removal of water as well as OFGs with a partial restoration of sp 2 carbon bonds, and also the removal of carbon atoms from the GO plane, introducing new structural vacancies throughout the graphene sheets (Gao et al, 2009;Pei & Cheng, 2012). It has been suggested that water may play a significant role in the irreversible decomposition of OFGs during the reduction process of GO under thermal treatment (Acik et al, 2010;Nú ñ ez, 2015). Therefore, study of the intercalated water in GO as a function of temperature can provide valuable information for the understanding of the thermal reduction process of GO.…”

Section: Introductionmentioning

confidence: 99%

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Intercalated water in multi-layered graphene oxide paper: an X-ray scattering study

et al. 2017

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X-ray scattering (XRS) experiments have been performed on multi-layered graphene oxide (GO) paper. GO can be easily hydrated as water naturally intercalates in the hydrophilic nanostructure. The effect of the intercalated water on the XRS signals is measured during dehydration under thermal treatment in the temperature range 298-473 K as well as during hydration under saturated water vapour pressure. A simple modelling of the XRS signals by taking into account the presence and the type of intercalated water (bound water or physisorbed water) is introduced. It allows an explanation of the variations of intensity and position of XRS reflections observed experimentally. research papers J. Appl. Cryst. (2017). 50, 876-884 Stéphan Rouzière et al. Intercalated water in multi-layered graphene oxide paper 877

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Section: Thermal Treatment Of Go Papermentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Intercalated water in multi-layered graphene oxide paper: an X-ray scattering study

et al. 2017

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“…34 The sol-gel approach starting from GO is a very cost-effective and versatile method which can also benefit from the rich surface chemistry of GO [35][36][37] for doping or forming hybrids. 38 Moreover, this method allows moulding the macroscopic shape to that of the container. Other techniques such as wet spinning 8 , electrospinning 39 or 3-D printing 40 of GO dispersions have been also used to prepare aerogels with specific macroscopic morphologies.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide Aerogels with Controlled Continuous Microchannels for Environmental Remediation

Rodríguez-Mata

González‐Domínguez

Benito

et al. 2019

ACS Appl. Nano Mater.

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3D porous graphene microarchitectures with aligned and continuous channels are of paramount interest for several applications such as pollutant removal, energy storage or biomedical engineering. For these applications, an accurate control in the pore microstructure is of capital importance. Freeze casting is a well-stablished technique to prepare graphene aerogels with unidirectional channels. This technique is typically applied to plain GO colloids, leading to discontinuous microchannels. Herein we have carried out the freeze process starting directly with partially reduced graphene (rGO) hydrogels prepared by a prior hydrothermal treatment in autoclave. This approach leads to the formation of aerogels with aligned and continuous microchannels, enabled by an

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“…GO, a chemically derived sheet of graphene decorated with oxygen containing functional groups on its basal plane and edges, was chosen due to its promise as chemically tunable platform for optoelectronic applications and its unique ability to act as an amphiphilic macromolecule . GO thus is ideally suited to self‐assemble hierarchical GO structures, such as GO films and papers, as well as to complex with many organic materials. In combination with conjugated polymers GO reveals its value as acceptor material and provides enhanced conducting and charge‐transfer properties .…”

Section: Introductionmentioning

confidence: 99%

Conjugated Polymer Nanoparticle–Graphene Oxide Charge‐Transfer Complexes

Istif

Hernández‐Ferrer

Urriolabeitia

et al. 2018

Adv Funct Materials

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The game-changing role of graphene oxide (GO) in tuning the excitonic behavior of conjugated polymer nanoparticles is described for the first time. This is demonstrated by using poly(3-hexylthiophene) (P3HT) as a benchmark conjugated polymer and employing an in situ reprecipitation approach resulting in P3HT nanoparticles (P3HT NPs ) with sizes of 50-100 nm in intimate contact with GO. During the self-assembly process, GO changes the crystalline packing of P3HT chains in the forming P3HT NPs from H to H/J aggregates exhibiting exciton coupling constants as low as 2 meV, indicating favorable charge separation along the P3HT chains. Concomitantly, π-π interface interactions between the P3HT NPs and GO sheets are established resulting in the creation of P3HT NPs -GO charge-transfer complexes whose energy bandgaps are lowered by up to 0.5 eV. Moreover, their optoelectronic properties, preestablished in the liquid phase, are retained when processed into thin films from the stable aqueous dispersions, thus eliminating the critical dependency on external processing parameters. These results can be transferred to other types of conjugated polymers. Combined with the possibility of employing water based "green" processing technologies, chargetransfer complexes of conjugated polymer nanoparticles and GO open new pathways for the fabrication of improved optoelectronic thin film devices.

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Graphene oxide–carbon nanotube hybrid assemblies: cooperatively strengthened OH⋯OC hydrogen bonds and the removal of chemisorbed water

Abstract: The effective removal of chemisorbed water in graphene oxide by oxidized carbon nanotubes via cooperatively strengthened OH···OC hydrogen bonds.

Cited by 39 publications

References 48 publications

Intercalated water in multi-layered graphene oxide paper: an X-ray scattering study

Intercalated water in multi-layered graphene oxide paper: an X-ray scattering study

Reduced Graphene Oxide Aerogels with Controlled Continuous Microchannels for Environmental Remediation

Conjugated Polymer Nanoparticle–Graphene Oxide Charge‐Transfer Complexes

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