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1、SensorsandActuatorsB173(2012)139–147ContentslistsavailableatSciVerseScienceDirectSensorsandActuatorsB:Chemicaljournalhomepage:www.elsevier.com/locate/snbTinoxide/graphenecompositefabricatedviaahydrothermalmethodforgassensorsworkingatroomtemperatureQianqian∗Li
2、n,YangLi,MujieYangDepartmentofPolymerScienceandEngineering,CyrusTangCenterforSensorMaterialsandApplications,ZhejiangUniversity,MOEKeyLaboratoryofMacromoleculeSynthesisandFunctionalization,Hangzhou310027,ChinaarticleinfoabstractArticlehistory:SnO/graphene2(GN)
3、compositewasfabricatedviaasimpleone-pothydrothermalmethodwithgrapheneReceived30March2012oxide(GO)andSnCl2astheprecursors.ThecompositewascharacterizedbyFouriertransforminfraredReceivedinrevisedform19June2012spectroscopy,Ramanspectroscopy,X-raydiffractionpatter
4、ns,scanningelectronmicroscopyandhigh21June2012AcceptedresolutionAvailableonline8August2012transmittanceelectronmicroscopy.Itexhibited3Dnanostructureinwhichflower-likemicrospheresconsistingofSnO2nanoflakesdistributedamongGNlayersdecoratedwithtinySnO2nanoparticle
5、s,2Keywords:andwasfeaturedwithhighsurfacearea(94.9m/g).GOissupposedtoactasatemplateinthehydrothermalprocess,promotingthepreferentialgrowthofSnO2nanocrystalsandpreventingtheGassensoragglomerationoxideofSnO2nanoparticles.NH3sensingcharacteristicsofthecompositea
6、troomtemperatureTinwereinvestigated,andfoundtocloselyrelatetoitscompositionandstructure.Underoptimalconditions,GrapheneCompositethecompositedisplayedhighresponsemagnitude(15.9%for50ppmNH3),fastresponse(responseandrecoverytime<1min),goodreversibilityandrepeata
7、bility.Moreover,itexhibitedsmalltemperatureHydrothermalmethod◦Roomtemperaturesensingcoefficientsintherangeof15–45C.Theabilityofdetectinggasatgoodroomtemperatureofthecom-positeisproposedtorelatetoitshighspecificsurface,goodconductivityofGNandinteractionsbetweenG
8、NandSnO2.©2012ElsevierB.V.Allrightsreserved.1.IntroductionSinceitsdiscoveryin2004,graphene(GN),whichisa2Dnanomaterialwithgoodelectronicconductivityandoutstand-SnO2isoneofthepromisinginorg
