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1、2021/9/201纳米材料的应用报告人:吕曼丽指导教师:宋丽娟教授报告时间:2017.6.212021/9/2022021/9/203trans-Azobenzenecis-Azobenzene研究背景2021/9/204Figure4.(d)Sketchofthegateswitchingmechanismwithaspace-fillingmodelofaporewindowofUiO-67andAZBinthecisconformationontheleftandthetransconformationontheright.Oxygensarecolo
2、redred,nitrogensgreen,carbonsoftheMOFgray,carbonsoftheAZBorange,andzirconiumsblue.Hydrogenatomsarehidden.365nm455nm2021/9/205Figure1.UiO-67layerinvestigatedby(a)XRD,(b)SEM,and(c)EDXmapping.ThecrystalstructureofUiO-67isshowninpanel(d).TheUiO-67layerisverythin(200nm),asshowninpanel(c)
3、,sothatXRDgivesonlylowreflexintensities.XRDshowsstrongsupportreflexesthataredenotedwithasterisksinpanel(a).However,thereflexescouldbeidentifiedasUiO-67.PermeancesfortheneatUiO-67layerwithoutAZBloadingaregivenasfollows.Thesingle-gaspermeancesandidealpermselectivities(inahypotheticalm
4、ixturewithH2)areshowninpanels(e)and(f),respectively.Themixed-gaspermeancesandrealpermselectivitiesforH2-containingmixturesaregiveninpanel(g).次级结构单元[Zr6O4(OH)4]12+膜的合成与表征应用:1.混合气体的分离2.传感器中的分子开关3.微电子学中的分子开关2021/9/2062021/9/207一、通过模板牺牲法对MOF晶体内的MNPs进行空间定位Fig.1Throughsurfacemodificationw
5、ithsurfactantPVP,MNPsofvarioussizes,shapesandcompositionsareloadedonthesurfaceofmetaloxide,andbyreactingthemetaloxide/MNPstemplatewithorganicligands,MNPscanbeencapsulatedinMOFcrystals.ThespatialdistributionofincorporatedMNPswithinMOFcrystalscanbecontrolledbytuningthecrystallizationb
6、ehaviourofMOFsunder(a)highand(b)lowconcentrationoftheorganicligands.2021/9/208二、将AuNPs融入ZIF-8进行空间调控Fig.2TEMimagesof(a)ZnONRs,(b)ZnONRs@Auand(c,d)ZnONRs@Au@ZIF-8compositeswithAuNPsatdifferentlocations:(c)insideand(d)neartothesurfaceofZIF-8.Scalebar,100nm2021/9/209Figure3SynthesisofZn
7、O@ZIF-8withextraSiO2underdifferentconcentrationofHmim.TEMimagesoftheproductsunder(a,b)highconcentrationand(c,d)lowconcentrationofHmim.MicrographsbanddshowthedifferenceofthesurfaceofSiO2inthetwocases.(b)TheconversionofZnOintoZIF-8crystalsisfollowedbythe‘dissolution-precipitationmecha
8、nism’athighligandco