LaF3纳米片和棒束的选择性合成及表征.pdf

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1、第27卷第6期无机化学学报Vo1．27No．62011年6月CHINESEJOURNALOFINORGANICCHEMISTRY1l71一l176LaF3纳米片和棒束的选择性合成及表征孙同明石玉军汤艳峰王森(南通大学化学化工学院，南通226019)摘要：室温条件下，以简单的液相法，通过改变氟源NaBF4和K：SiF，制得不同形貌的LaF纳米晶(片及棒束)。X射线衍射(XRD)结果显示所得的2种不同形貌的产物均为结晶良好的六方相LaF，。场发射扫描电子显微镜(FE—SEM)、透射电子显微镜(TEM)结果表明由NaBF4制得大量均匀、厚度约为20rim的六边形纳米片

2、，而由KSiF。得到平均直径约200nm、长度约400nm的棒束。本文详细讨论了氟源种类、反应时间、温度、反应物比例等反应参数对产物La形貌的影响。提了可能的反应机理并进一步研究了掺杂产物LaF：Eu3+及LaF：Tb“在室温下的荧光性质。关键词：稀土氟化物；纳米材料；溶液法；掺杂；荧光中图分类号：0614．33l；0613．41文献标识码：A文章编号：】001—4861(2011)06—1171—06SelectiveSynthesisandCharacterizationofLaF3NanoplatesandBundlesSUNTong—MingSHIYu—

3、JunTANGYah—FengWANGMiao(SchoolofChemistryandChemicalEngineering,NantongUniversity,Nrmtong,Jiangsu226019，China)Abstract：Atroomtemperature，LaF3nanocrystalswithdifferentmorphologies(platesandbundles)havebeensuccessfullyfabricatedviaasimplesolutionroutebyvaryingthefluoridesource(NaBF4and

4、K2SiF6)．X．raypowderdiffraction(XRD)resultsindicatethatalltheas-prepareddifferentmorphologicalLaF3productshavehexagonalstructureandhighcrystallinity．Fieldemissionscanningelectronmicroscopy(FE．SEM)andtransmissionelectronmicroscopy(TEM)resultsshowthatlarge—scaleanduniformhexagonalnanopl

5、ateswiththicknessabout20nmcanbeeasilysynthesizedfromNaBF4，whilebundleswithdiameterof200nmandlengthabout400nmhavebeenpreparedfromK!SiF6．Somereactionparametersffluoridesource，reactiontime，temperatureandmolarratioofreactants)havebeensystematicallyinvestigatedduringtheprocessofobtainingd

6、ifferentmorphologicalLaF3．Furthermore，apossiblereactionmechanismforthegrowthofLaF3isproposedandtheroomtemperaturephotoluminescentpropertiesofLaF3：EuandLaF3：Tbcrystalshavebeenmeasured．Keywords：rareearthfluorides；nanomaterials；solutionroute；dope；photoluminescence0IntroductionlabelingAm

7、ongthesefluorides，LaF3nano．andmicrostructureshaverecentlystimulatedbroadBinarylanthanidefluoride(LnF3)materials，akindresearchinterestssinceitcanbeusedasahostcrystalofimportantrare—earthbasedcompound，hasattractedforlanthanide—dopedphosphorswithinterestingdown／increasingattentioninmode

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