Sodium Hypochlorite and Sodium Bromide Individualized and Stabilized Carbon Nanotubes in Water

Handle URI:
http://hdl.handle.net/10754/625831
Title:
Sodium Hypochlorite and Sodium Bromide Individualized and Stabilized Carbon Nanotubes in Water
Authors:
Xu, Xuezhu; Zhou, Jian ( 0000-0003-0144-5901 ) ; Colombo, Veronica; Xin, Yangyang; Tao, Ran ( 0000-0001-5920-3185 ) ; Lubineau, Gilles ( 0000-0002-7370-6093 )
Abstract:
Aggregation is a major problem for hydrophobic carbon nanomaterials such as carbon nanotubes (CNTs) in water because it reduces the effective particle concentration, prevents particles from entering the medium, and leads to unstable electronic device performances when a colloidal solution is used. Molecular ligands such as surfactants can help the particles to disperse, but they tend to degrade the electrical properties of CNTs. Therefore, self-dispersed particles without the need for surfactant are highly desirable. We report here, for the first time to our knowledge, that CNT particles with negatively charged hydrophobic/water interfaces can easily self-disperse themselves in water via pretreating the nanotubes with a salt solution with a low concentration of sodium hypochlorite (NaClO) and sodium bromide (NaBr). The obtained aqueous CNT suspensions exhibit stable and superior colloidal performances. A series of pH titration experiments confirmed the presence and role of the electrical double layers on the surface of the salted carbon nanotubes and of functional groups and provided an in-depth understanding of the phenomenon.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Xu X, Zhou J, Colombo V, Xin Y, Tao R, et al. (2017) Sodium Hypochlorite and Sodium Bromide Individualized and Stabilized Carbon Nanotubes in Water. Langmuir. Available: http://dx.doi.org/10.1021/acs.langmuir.7b00850.
Publisher:
American Chemical Society (ACS)
Journal:
Langmuir
Issue Date:
20-Sep-2017
DOI:
10.1021/acs.langmuir.7b00850
Type:
Article
ISSN:
0743-7463; 1520-5827
Sponsors:
The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). We thank KAUST for its continuous support.
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b00850
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorXu, Xuezhuen
dc.contributor.authorZhou, Jianen
dc.contributor.authorColombo, Veronicaen
dc.contributor.authorXin, Yangyangen
dc.contributor.authorTao, Ranen
dc.contributor.authorLubineau, Gillesen
dc.date.accessioned2017-10-09T05:50:34Z-
dc.date.available2017-10-09T05:50:34Z-
dc.date.issued2017-09-20en
dc.identifier.citationXu X, Zhou J, Colombo V, Xin Y, Tao R, et al. (2017) Sodium Hypochlorite and Sodium Bromide Individualized and Stabilized Carbon Nanotubes in Water. Langmuir. Available: http://dx.doi.org/10.1021/acs.langmuir.7b00850.en
dc.identifier.issn0743-7463en
dc.identifier.issn1520-5827en
dc.identifier.doi10.1021/acs.langmuir.7b00850en
dc.identifier.urihttp://hdl.handle.net/10754/625831-
dc.description.abstractAggregation is a major problem for hydrophobic carbon nanomaterials such as carbon nanotubes (CNTs) in water because it reduces the effective particle concentration, prevents particles from entering the medium, and leads to unstable electronic device performances when a colloidal solution is used. Molecular ligands such as surfactants can help the particles to disperse, but they tend to degrade the electrical properties of CNTs. Therefore, self-dispersed particles without the need for surfactant are highly desirable. We report here, for the first time to our knowledge, that CNT particles with negatively charged hydrophobic/water interfaces can easily self-disperse themselves in water via pretreating the nanotubes with a salt solution with a low concentration of sodium hypochlorite (NaClO) and sodium bromide (NaBr). The obtained aqueous CNT suspensions exhibit stable and superior colloidal performances. A series of pH titration experiments confirmed the presence and role of the electrical double layers on the surface of the salted carbon nanotubes and of functional groups and provided an in-depth understanding of the phenomenon.en
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). We thank KAUST for its continuous support.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b00850en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b00850.en
dc.titleSodium Hypochlorite and Sodium Bromide Individualized and Stabilized Carbon Nanotubes in Wateren
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalLangmuiren
dc.eprint.versionPost-printen
dc.contributor.institutionChemical and Materials Engineering, University of Padua, Padova 35122, Italyen
kaust.authorXu, Xuezhuen
kaust.authorZhou, Jianen
kaust.authorColombo, Veronicaen
kaust.authorXin, Yangyangen
kaust.authorTao, Ranen
kaust.authorLubineau, Gillesen
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