Production of Ni(OH)2 nanosheets by liquid phase exfoliation

Here we demonstrate that liquid phase exfoliation can be used to convert layered crystals of nickel hydroxide into Ni(OH)2 nanosheets in relatively large ... Jumptomaincontent Jumptositesearch Issue28,2016 PreviousArticle NextArticle Fromthejournal: JournalofMaterialsChemistryA ProductionofNi(OH)2nanosheetsbyliquidphaseexfoliation:fromopticalpropertiestoelectrochemicalapplications† Andrew Harvey,‡ab   Xiaoyun He,‡ab   IanJ. Godwin,ab   Claudia Backes, ab   David McAteer,ab   NinaC. Berner,ac   Niall McEvoy,ac   Auren Ferguson,ab   Aleksey Shmeliov,ac   MichaelE.G. Lyons,ac   Valeria Nicolosi,ac   GeorgS. Duesberg,ac   JohnF. Doneganab  and  JonathanN. Coleman*ab   Authoraffiliations * Correspondingauthors a CRANN&AMBER,TrinityCollegeDublin,Dublin2,Ireland E-mail: [email protected] b SchoolofPhysics,TrinityCollegeDublin,Dublin2,Ireland c SchoolofChemistry,TrinityCollegeDublin,Dublin2,Ireland Abstract HerewedemonstratethatliquidphaseexfoliationcanbeusedtoconvertlayeredcrystalsofnickelhydroxideintoNi(OH)2nanosheetsinrelativelylargequantitiesandwithouttheneedforionintercalation.Whileotherproceduresrequireharshsynthesisconditionsandmultiplereactionsteps,thismethodinvolvesultrasonicationofcommerciallyavailablepowdersinaqueoussurfactantsolutionsandsoisrelativelymildandpotentiallyscalable.SuchmildexfoliationispossiblebecausethesurfaceenergyofNi(OH)2,asmeasuredbyinversegaschromatography,isrelativelylowat∼70mJm−2,similartootherlayeredmaterials.TEM,AFM,XPSandRamanspectroscopyshowtheexfoliatednanosheetstoberelativelythin(mean∼10monolayersthick)andofgoodquality.Sizeselectionbyliquidcascadecentrifugationallowedtheproductionofsampleswithmeannanosheetlengthsrangingfrom55to195nm.Opticalmeasurementsondispersionsshowedtheopticalabsorptioncoefficientspectratoberelativelyinvariantwithnanosheetsizewhilethescatteringcoefficientspectravariedstronglywithsize.Theresultantsize-dependenceallowstheextinctionspectratobeusedtoestimatenanosheetsizeaswellasconcentration.Weusedtheexfoliatednanosheetstopreparethinfilmelectrodesforuseinsupercapacitorsandasoxygenevolutioncatalysts.Whiletheresultantcapacitancewasreasonablyhighat∼1200Fcm−3(20mVs−1),thecatalyticperformancewasexceptionalwithcurrentsof10mAcm−2observedatoverpotentialsaslowas297mV,closetothestateoftheart. Youhaveaccesstothisarticle Pleasewaitwhileweloadyourcontent... Somethingwentwrong.Tryagain? About Citedby Related DownloadoptionsPleasewait... Supplementaryfiles Supplementaryinformation PDF(1409K) Articleinformation DOI https://doi.org/10.1039/C6TA02811J Articletype Paper Submitted 05Apr2016 Accepted 20Jun2016 Firstpublished 21Jun2016 DownloadCitation J.Mater.Chem.A,2016,4,11046-11059 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS Permissions Requestpermissions ProductionofNi(OH)2nanosheetsbyliquidphaseexfoliation:fromopticalpropertiestoelectrochemicalapplications A.Harvey,X.He,I.J.Godwin,C.Backes,D.McAteer,N.C.Berner,N.McEvoy,A.Ferguson,A.Shmeliov,M.E.G.Lyons,V.Nicolosi,G.S.Duesberg,J.F.DoneganandJ.N.Coleman, J.Mater.Chem.A,2016, 4,11046 DOI:10.1039/C6TA02811J Torequestpermissiontoreproducematerialfromthisarticle,pleasegotothe CopyrightClearanceCenterrequestpage. IfyouareanauthorcontributingtoanRSCpublication,youdonotneedtorequestpermission providedcorrectacknowledgementisgiven. Ifyouaretheauthorofthisarticle,youdonotneedtorequestpermissiontoreproducefigures anddiagramsprovidedcorrectacknowledgementisgiven.Ifyouwanttoreproducethewholearticle inathird-partypublication(excludingyourthesis/dissertationforwhichpermissionisnotrequired) pleasegototheCopyrightClearanceCenterrequestpage. ReadmoreabouthowtocorrectlyacknowledgeRSCcontent. Socialactivity Tweet Share Searcharticlesbyauthor AndrewHarvey XiaoyunHe IanJ.Godwin ClaudiaBackes DavidMcAteer NinaC.Berner NiallMcEvoy AurenFerguson AlekseyShmeliov MichaelE.G.Lyons ValeriaNicolosi GeorgS.Duesberg JohnF.Donegan JonathanN.Coleman FetchingdatafromCrossRef. Thismaytakesometimetoload. Loadingrelatedcontent Spotlight Advertisements Publishing Journals CurrentJournals ArchiveJournals AllJournals Books NewTitles All Bookshop PickandChoose Databases LiteratureUpdates ChemSpider TheMerckIndex* MarinLit More ForMembers ForLibrarians Subscribe RSSFeeds Blogs ChemistryWorld EducationinChemistry OpenAccess HistoricalCollection