面试ppt演讲模板.docx

面试ppt演讲模板.docx

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面试ppt演讲模板

面试ppt演讲模板

　　篇一：

就职演讲PPT模板

　　thedraftofacademicpresentation国际会议的口头报告模板，每页ppt你需要讲什么东西需要分页详细写，尽量口语化。

　　如下是本人参加比利时会议的模板，供大家参考。

p1开场白：

　　thetileofmyacademicpresentationis“thepreparationandcatalytic

　　performanceofporoussilicananotubefunctionedwithheteroatoms”ishallonlytaketenminutesofyourwilltalkaboutthetopiconthepreparationofporous

　　p3

　　thecontentislistedasfollows.p4

　　p5

　　butduetolackofactivesites,wehavetointroduceorganicorinorganicspecies

　　asactivesites.andthecatalyticperformanceneedtobefurtherimproved.p6

　　asweknow,thethreefactorsincludingactivity,scaleanddiffusionfactorplay

　　decisiveroleinthecatalysis,affectingtheyield,selectivity,stabilitystrongly.

　　inourpresentation,wemainlyfocusontheinfluenceofscalefactoronthe

　　duetolackofactivesitesformesoporoussilica,twomainmethodsarewidelyreported,bywhichvariousorganicor

　　inorganicactivesitescanbeimmobilizedonthesurfaceorincorporatedintothe

　　frameworkofmesopoous

　　thoughvariousmorphologiesofmesoporossilicawerewidelysynthesized,the

　　synthesisofthemesoporossilica,withthreesimultaneouscharacteristicsincluding

　　dopedmetal,mesoporousstructureandspecificmorphology,isalwaysachallenge,

　　whichisrarelyotherwords,forourcaseexploringapropercondition,atwhichthesilicon

　　andmetalsourcescansimultaneouslyhydrolyze,canensureadesiredmaterial.p9

　　next,let’slookatthesyntheticsteps.firstly,?

.then,?

.afterthat,?

.

　　atlast,weobtainedtheproducts.

　　p10

　　inthiswork,bychangingthesynthesisconditions,suchas?

andsoon,the

　　puremesoporoussilicawithdifferentmorphologiesweresynthesized,including

　　nanosphere,nanorod,helix,capsuleandnanotube.wewillfocusonthepreparation

　　andcatalyticapplicationofmesoporoussilicawithnanotubemorphology.p11

　　thesemimagesofsamples:

a1,a2,a3areshowninthefigure.itcanbeseen

　　thatsamplea1isnanowire-likewithlengthofabout2μmanddiameterofabout100nm.

　　whentheamountof...isg,themorphologyofsamplea2becametobeshortand

　　thickrodsandthesizeisabout1μminlengthand400nmindiameter,respectively.

　　withfurtherincreasingtheamountof...,thesamplea3anda4turnedtobespherical

　　morphology.italsocanbeseenthatthediametersofsamplesa3anda4are

　　substantiallythesameabout450nm.however,thesphericalmorphologyofa4ismore

　　regularthanthatofxrdpatternsshowedfourreflectionpeaksattributedto,,

　　and,respectively,duetothehexagonalsructure.p12

　　then,wekeepthesameamountof...,increasingtheamountof....wefoundthatthelengthincreasedgradually.thexrdpatternsalsoshowedthe

　　hexagonalsructureofsamplesb1,b2,b3,b4.p13

　　moreover,anadditionalproofofthehexagonalsymmetrystructureisgivenby

　　temandtheftpattern.then2adsorption-desorptionisothermsofthesamplesb1,

　　b2,b3,b4exhibitatypicaltype-ivisotherm.accordingtothetableofstructuralparameters,wecanfindthatthespecific

　　surfaceareaandtotalporevolumeincreasegradually,thethicknessofwalldecrease

　　andthereisnoobviouschangeindiameter.p14

　　furthermore,thepossiblesynthesismechanismofthemesoporoussilicananotube

　　indualtemplatessystemwasproposed.wesuggestthatduetoelectrostaticrepulsion

　　betweenpositivelychargedammoniumionsfromhydratedammoniamoleculesand

　　hydrophilicgroupsof...,especiallyinammoniasolution,thehigh

　　concentratedammoniumionsprovideacrowdedandrepulsivespacetopreventthe

　　conjunctionof...molecules,leadingtotheformationoftherod-likemicellesas

　　templatetoformporestructureinsteadofsphere-likeroleofco-template...

　　issuggestedtotunethelengthofrod-likemicellesbyarrangingitselfalongthe

　　axisofchannelwithpeoandppopartimmersedinthehydrophilicandthehydrophobic

　　groupofcta+respectively.asaresult,themesoporousnanotubewithdifferentlength

　　willbesynthesized.however,thenon-polar...micellesarenotaffectedby

　　positivelychargedammonium.whentheamountofco-templateincreasedfurther,the

　　non-polar...micellestendtocontrolthemorphologyofmicelleswhichare

　　sequentiallyfromnanotube,shortrodtosphere-likeones.itmybethereasonthat

　　thenon-polar...micelleswouldprovidestrongerattractiveforcethanthe

　　electrostaticrepulsionderivedfromthepeoblock,ammoniumionsandheadgroup

　　of...,respectively.

　　p15

　　inordertoinvestigatetheinfluenceofthemorphologyandstructureof

　　mesoporoussilicaoncatalyticperformance,thesampleswithcopperincorporatedwere

　　thefigureshowsthesemandtemimagesofsamplesa1,a2,a3,fromwhichwecan

　　seetheyrepresentincrement