不同形貌的ZnSn(OH)6的制备与气敏性能的应用-论文.pdf

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1、第42卷第1期上海师范大学学报(自然科学版)V01．42，No．12013年2月JournalofShanghaiNormalUniversity(NaturalSciences)Feb．，2013Synthesisofshape-controlledZnSn(OH)6andgassensingproperties4HANLixianl，DUMengjuanl，LIYushen91，YEBin2，YUXibinl(1．CollegeoflifeandEnvironmentSciences，ShanghaiNormalUniversity，Shanghai200234，China；2．Depar

2、tmentofAppliedMathematics，ShanghaiUniversityofFinanceandEconomics，Shanghai200433，China)Abstract：MonodisperseZnSn(OH)6(zns)microcrystallites(MCs)withtwomorphologieshavebeenafacilepreparationmethodwithoutcomplicatedsteps，advancedexpefimentalpreparedthroughconditionsorandcompositionalcharacteristicsoft

3、he3Dhierarchitecturesequipments．Themorphology(HAs)ofZHSMCswereinvestigatedbyvmrioustechniquessuchasXRD，FESEM，TEM，UV—visspectra．BET．InthereactionsystemthemorphologyevolutionfromcubetospherewascontrolledwitlIaddingdifferentconcentrationofNH4OH．Thegassenso璐basedonZHSexhibitedagoodgassensitivitytoHCHO．H

4、owever，thegassensorsbasedonsphericalZHSMCsexhibitedthehighersensitivity，shorterrecoverytimeandgoodreproducibilitytoHCHOthanthoseofcubicZHSMCs．Morewitll～600nellsizehadthebestgas—sensingimportantly．itWasfoundthatsphericalZHSMCspropertiesowingtomoreoxygenvacancydefects，lessbandgapenergy，andlargeractive

5、surface龇_ea．Keywords：ZHS；TEM；vacancydefects；lessbandgapenergyCLCumber：0611．64Documentcode：AArticleID：1000-5137(2013)01-0065-081IntroductionThefabricationofnarlo—ormicro．sizeparticleswithcontrollingmorphologies，orientations，anddimensionalitieshasattractedmuchattention，becausethephysicalandchemicalpro

6、pertiesofmaterialsCanbestronglyinfluencedbytheirsizesandshapes‘卜111．Thestudyofcompositemetaloxides(CMOs)isalwaysinterestingtoresearchersbecausetheirperformancesaresuperioroversinglemetaloxidesinmanycases[12-13]，suchasgas—sensormaterials．Forinstance，polyhedralzinchydroxystannate(ZHS)，CdIn204¨41andhav

7、ebeenusedasgas—sensormaterials[15]．EuFe03nanoparticlesZinchydroxystannate(ZHS)，animportantmemberofCMOs，isakindofperovskitestructuretendingtoformface—centered—cubic(FCC)crystalstructure．Uptonow，zinchyd