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会计学2024/10/292024/10/292024/10/29应用(yìngyòng):2024/10/29一、通过模板牺牲法对MOF晶体内的MNPs进行(jìnxíng)空间定位二、将AuNPs融入ZIF-8进行空间(kōngjiān)调控Figure3SynthesisofZnO@ZIF-8withextraSiO2underdifferentconcentrationofHmim.TEMimagesoftheproductsunder(a,b)highconcentrationand(c,d)lowconcentrationofHmim.MicrographsbanddshowthedifferenceofthesurfaceofSiO2inthetwocases.(b)TheconversionofZnOintoZIF-8crystalsisfollowedbythe‘dissolution-precipitationmechanism’athighligandconcentration,resultinginZIF-8crystalsthatarenucleatedontoSiO2surfaces.(d)TheconversionofZnOintoZIF-8crystalsisfollowedbythe‘localizedconversionmechanism’atlowligandconcentration;thus,ZIF-8crystalswouldnucleateonlyontothesurfacesofZnO.Scalebar,1mm(a,c)and200nm(b,d).Figure6|CatalyticpropertiesofZnO@Pt@ZIF-8compositesforolefinhydrogenation.(a)Size-selectivehydrogenationofn-hexeneandcyclooctenecatalysedbyZnO@Pt@ZIF-8composite(3.3nmPtNPswithcontentof0.9%);(b)thereusabilityofPt@ZIF-8-‘sur’ascatalystsforthehydrogenationofhexeneforfiveconsecutiveruns.Reactionconditions:0.01gofcatalyst,0.1mlofsubstrate,3mlofethylacetate,1atmofhydrogen,35C,reactiontimeof12h.PureZIF-8andPt@CNTwereusedascontrols.2024/10/292024/10/29