Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water

Owing to their great significance for energy storage and sensing applications, multi-layer papers consisting of graphene oxide-carbon nanotube (GO-CNT) hybrid sheets were prepared by in situ exfoliation of graphite oxide in the presence of oxidized CNTs (oCNTs). For the first time we elucidate the i...

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Autores: Núñez, J.D., Benito, A.M., Rouzière, S., Launois, P., Arenal, R., Ajayan, P.M., Maser, W.K.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:62073
Acceso en línea:http://zaguan.unizar.es/record/62073
Access Level:acceso abierto
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spelling Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed waterNúñez, J.D.Benito, A.M.Rouzière, S.Launois, P.Arenal, R.Ajayan, P.M.Maser, W.K.Owing to their great significance for energy storage and sensing applications, multi-layer papers consisting of graphene oxide-carbon nanotube (GO-CNT) hybrid sheets were prepared by in situ exfoliation of graphite oxide in the presence of oxidized CNTs (oCNTs). For the first time we elucidate the influence of oCNTs on chemisorbed water (CW), i.e. the water molecules inherently bound to the oxygen functional groups (OFGs) of graphene oxide (GO) and responsible for irreversible structural damage upon thermal reduction processes. We show that oCNTs self-assemble onto GO sheets during the liquid phase processing steps by forming cooperatively strengthened OH¿OC hydrogen bonds between the carboxylic groups of the oCNTs and OFGs of GO. At oCNT amounts of about 10 to 15 wt% this leads to the displacement of considerable amounts of CW without altering the original chemical composition of GO. The thermally reduced GO-CNT (rGO-CNT) papers reveal improved sp2 character and an enhancement of the specific capacitance by 75% with respect to thermally reduced GO (rGO), largely due to the effective removal of CW by oxidized CNTs. These findings disclose the relevance of the cooperative hydrogen bonding phenomena in graphene oxide paper/film electrodes for the development of improved electrochemical energy storage and sensing devices.2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://zaguan.unizar.es/record/62073reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/MINECO/MAT2016-79776-Pinfo:eu-repo/grantAgreement/ES/MINECO/FIS2013-46159-C3-3-Pinfo:eu-repo/grantAgreement/ES/MINECO-FEDER/ENE2016-79282-C5-1-Rinfo:eu-repo/grantAgreement/ES/MINECO-FEDER/ENE2013-48816-C5-5-RThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 696656-GrapheneCore1info:eu-repo/grantAgreement/EC/H2020/696656info:eu-repo/grantAgreement/EC/FP7/312483info:eu-repo/grantAgreement/ES/DGA/T66info:eu-repo/semantics/openAccessoai:zaguan.unizar.es:620732026-05-29T13:59:51Z
dc.title.none.fl_str_mv Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water
title Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water
spellingShingle Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water
Núñez, J.D.
title_short Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water
title_full Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water
title_fullStr Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water
title_full_unstemmed Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water
title_sort Graphene oxide-carbon nanotube hybrid assemblies: Cooperatively strengthened OH¿O=C hydrogen bonds and the removal of chemisorbed water
dc.creator.none.fl_str_mv Núñez, J.D.
Benito, A.M.
Rouzière, S.
Launois, P.
Arenal, R.
Ajayan, P.M.
Maser, W.K.
author Núñez, J.D.
author_facet Núñez, J.D.
Benito, A.M.
Rouzière, S.
Launois, P.
Arenal, R.
Ajayan, P.M.
Maser, W.K.
author_role author
author2 Benito, A.M.
Rouzière, S.
Launois, P.
Arenal, R.
Ajayan, P.M.
Maser, W.K.
author2_role author
author
author
author
author
author
description Owing to their great significance for energy storage and sensing applications, multi-layer papers consisting of graphene oxide-carbon nanotube (GO-CNT) hybrid sheets were prepared by in situ exfoliation of graphite oxide in the presence of oxidized CNTs (oCNTs). For the first time we elucidate the influence of oCNTs on chemisorbed water (CW), i.e. the water molecules inherently bound to the oxygen functional groups (OFGs) of graphene oxide (GO) and responsible for irreversible structural damage upon thermal reduction processes. We show that oCNTs self-assemble onto GO sheets during the liquid phase processing steps by forming cooperatively strengthened OH¿OC hydrogen bonds between the carboxylic groups of the oCNTs and OFGs of GO. At oCNT amounts of about 10 to 15 wt% this leads to the displacement of considerable amounts of CW without altering the original chemical composition of GO. The thermally reduced GO-CNT (rGO-CNT) papers reveal improved sp2 character and an enhancement of the specific capacitance by 75% with respect to thermally reduced GO (rGO), largely due to the effective removal of CW by oxidized CNTs. These findings disclose the relevance of the cooperative hydrogen bonding phenomena in graphene oxide paper/film electrodes for the development of improved electrochemical energy storage and sensing devices.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/62073
url http://zaguan.unizar.es/record/62073
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/MINECO/MAT2016-79776-P
info:eu-repo/grantAgreement/ES/MINECO/FIS2013-46159-C3-3-P
info:eu-repo/grantAgreement/ES/MINECO-FEDER/ENE2016-79282-C5-1-R
info:eu-repo/grantAgreement/ES/MINECO-FEDER/ENE2013-48816-C5-5-R
This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 696656-GrapheneCore1
info:eu-repo/grantAgreement/EC/H2020/696656
info:eu-repo/grantAgreement/EC/FP7/312483
info:eu-repo/grantAgreement/ES/DGA/T66
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
publisher.none.fl_str_mv
dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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