Facile synthesis of hollow In2O3 microspheres and their gas sensing performances

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1、RSCAdvancesViewArticleOnlinePAPERViewJournal

2、ViewIssueFacilesynthesisofhollowIn2O3microspheresandtheirgassensingperformancesCitethis:RSCAdv.,2015,5,4609aabaaaXiaolongHu,XinZhou,BiaoWang,PengSun,*XiaoweiLi,ChenWang,aaJiangyangLiuandGeyuLu*HollowIn2O3microspheresconstruct

3、edbyprimarynanoparticlesweresuccessfullypreparedbythermaltreatmentoftheprecursor,whichwassynthesizedviaafacilechemicalsolutionroutewithoutanytemplatesorsurfactants.Theimagesoffieldemissionscanningelectronmicroscopy(FESEM)andtransmissionelectronmicroscopy(TEM)indicatedtha

4、tthesamplewascomposedofalargenumberofReceived12thOctober2014Accepted11thDecember2014hollowIn2O3microsphereswithdiametersof1–2mm.Inaddition,agassensorbasedontheIn2O3hollowmicrosphereswasfabricatedanditsgassensingperformanceswereinvestigated.ItwasfoundDOI:10.1039/c4ra1224

5、4ethatsensorsbasedontheas-preparedsamplehadalowoperatingtemperature(80C),andexhibitedwww.rsc.org/advanceshighresponse,lowdetectionlimitandexcellentselectivitytoNO2.1.Introductiongassensors,whichhavebeenfoundtobeparticularlysensitivetoreducinggases18,19suchasethanolando

6、xidizinggases20,21Inthepastdecade,theinvestigationofoxidesemiconductorssuchasnitrogendioxideandozone.Manystudieshavebeenforgassensingapplicationshasbecomeahottopicbecauseofconductedinordertoimprovetheperformanceofgassensorsincreasingsafetyconcernsfortheenvironmentandind

7、ustrialbyreducingthesizeofIn2O3sinceYamazoedemonstratedthatactivities.1–3Foroxidesemiconductorgassensors,highsensi-areductionincrystallitesizecouldsignicantlyenhancesensingperformance.22,23However,theaggregationbetweenthetivityandexcellentselectivityarethetwomostimport

8、antparameters.Therefore,developingnewstrategiestoincreasenanoparticleswillresultinthedegradationofthegassensingsensitivityandimprovetheselectivityofsensorsrepresentoneproperties.Recently,In2O3withhollowstructureshavebeenofthemajorscienticchallenges.Acriticalelementinth

9、edemonstratedtobepromisingcandidatesforultrasensitivepursuitofthisquestisthediscoveryofefficientandcost-sensorsd