国际会议开场白Word格式.docx
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国际会议开场白Word格式.docx
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P1
开场白:
Iamsohonoredtobewithyoutocommunicateacademicquestionsandideas.
Thetileofmyacademicpresentationis“Thepreparationandcatalyticperformanceofporoussilicananotubefunctionedwithheteroatoms”
Ishallonlytaketenminutesofyourtime.
Iwilltalkaboutthetopiconthepreparationofporousmaterials.
P2
Firstofall,iwannaintroducemyself.Icomefromnanjinguniversityoftechnology,nanjingcity,china.
P3
Thecontentislistedasfollows.
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Allourresearchesareconductedbytheacademicthoughts.Generallyspeaking,wearecommittedtoporousmaterials.Inordertoexplorehigh-performancefunctionalizedmaterialsforPilotexperimentsandscale-upproduction;
wetunethestructure,suchascompositionandmorphologystepbystepandoptimizethemfurther.What’smore,thepossiblesynthesismechanismsarealsoinvestigated.Today,thepresentationisbasedontheright-handbranch.【国际会议开场白】
P5
Itisknownthatmesoporoussilicahaveexcellentcharactersasthecatalystcarrier,suchas……..
Butduetolackofactivesites,wehavetointroduceorganicorinorganicspeciesasactivesites.Andthecatalyticperformanceneedtobefurtherimproved.
P6
Asweknow,thethreefactorsincludingactivity,scaleanddiffusionfactorplaydecisiveroleinthecatalysis,affectingtheyield,selectivity,stabilitystrongly.Inourpresentation,wemainlyfocusontheinfluenceofscalefactoronthecatalysis.
P7
Duetolackofactivesitesformesoporoussilica,twomainmethods(surfaceloading,modifiedframework)arewidelyreported,bywhichvariousorganicorinorganicactivesitescanbeimmobilizedonthesurfaceorincorporatedintotheframeworkofmesopooussilica.
P8
Thoughvariousmorphologiesofmesoporossilicawerewidelysynthesized,thesynthesisofthemesoporossilica,withthreesimultaneouscharacteristicsincludingdopedmetal,mesoporousstructureandspecificmorphology,isalwaysachallenge,whichisrarelyreported.
Inotherwords,forourcaseexploringapropercondition,atwhichthesiliconandmetalsourcescansimultaneouslyhydrolyze,canensureadesiredmaterial.
P9
Next,let’slookatthesyntheticsteps.Firstly,….Then,….Afterthat,….Atlast,weobtainedthe
products.
P10
Inthiswork,bychangingthesynthesisconditions,suchas…,andsoon,thepuremesoporoussilicawithdifferentmorphologiesweresynthesized,includingnanosphere,nanorod,helix,capsuleandnanotube.Wewillfocusonthepreparationandcatalyticapplicationofmesoporoussilicawithnanotubemorphology.
P11
theSEMimagesofsamples:
A1,A2,A3areshowninthefigure.Itcanbeseenthatsamplea1isnanowire-likewithlengthofabout2μmanddiameterofabout100nm.Whentheamountof...is0.04g,themorphologyofsampleA2becametobeshortandthickrodsandthesizeisabout1μminlengthand400nmindiameter,respectively.Withfurtherincreasingtheamountof...,thesampleA3andA4turnedtobesphericalmorphology.ItalsocanbeseenthatthediametersofsamplesA3andA4aresubstantiallythesameabout450nm.However,thesphericalmorphologyofA4ismoreregularthanthatofA3.【国际会议开场白】
TheXRDpatternsshowedfourreflectionpeaksattributedto(100),(110),(200)and(210),respectively,duetothehexagonalsructure.
P12
Then,wekeepthesameamountof...,increasingtheamountof....
Wefoundthatthelengthincreasedgradually.TheXRDpatternsalsoshowedthehexagonalsructureofsamplesB1,B2,B3,B4.
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Moreover,anadditionalproofofthehexagonalsymmetrystructureisgivenbyTEMandtheFTpattern.TheN2adsorption-desorptionisothermsofthesamplesB1,B2,B3,B4exhibitatypicaltype-IVisotherm.【国际会议开场白】
Accordingtothetableofstructuralparameters,wecanfindthatthespecificsurfaceareaandtotalporevolumeincreasegradually,thethicknessofwalldecreaseandthereisnoobviouschangeindiameter.
P14
Furthermore,thepossiblesynthesismechanismofthemesoporoussilicananotubeindualtemplatessystemwasproposed.Wesuggestthatduetoelectrostaticrepulsionbetweenpositivelychargedammoniumionsfromhydratedammoniamoleculesandhydrophilicgroupsof...,especiallyinammonia(NH3,25wt.%)solution,thehighconcentratedammoniumionsprovideacrowdedandrepulsivespacetopreventtheconjunctionof...molecules,leadingtotheformationoftherod-likemicellesastemplatetoformporestructureinsteadofsphere-likeones.Theroleofco-template...issuggestedtotunethelengthofrod-likemicellesbyarrangingitselfalongtheaxisofchannelwithPEOandPPOpartimmersedinthehydrophilicandthehydrophobicgroupofCTA+respectively.Asaresult,themesoporousnanotubewithdifferentlengthwillbesynthesized.However,thenon-polar...micellesarenotaffectedbypositivelychargedammonium.Whentheamountofco-templateincreasedfurther,thenon-polar...micellestendtocontrolthemorphologyofmicelleswhicharesequentiallyfromnanotube,shortrodtosphere-likeones.Itmybethereasonthatthenon-polar...micelleswouldprovidestrongerattractiveforcethantheelectrostaticrepulsionderivedfromthePEOblock,ammoniumionsandheadgroupof...,respectively.
P15
Inordertoinvestigatetheinfluenceofthemorphologyandstructureofmesoporoussilicaoncatalytic
performance,thesampleswithcopperincorporatedweresynthesized.
P16
ThefigureshowstheSEMandTEMimagesofsamplesa1,a2,a3,fromwhichwecanseetheyrepresentincrementallengthintherangeofabout0.5,1.0and1.5μm,andinsignificantchangeindiameteraround100nm.InXRDpatterns,therearealsofourreflectionpeaksforthesampleswithcopperincorprated,respectively,whichindicatestheincorporationoftheinorganiccoppersalthasnoobviouseffectonthehexagonalsructureandtheordereddegreeofporestructure.Moreover,thetrendsinlengthandthediameterofnanotubeareillustrated.
P17
TheN2adsorption-desorptionisothermsofthesamplesa1,a2,a3exhibitatypicaltype-IVisothermaccordingtotheIUPACclassificationandnohysteresisloopattherelativepressurerangeof0.2≤p/p0≤0.4,implyingthesamplesnotonlyhaveorderedmesoporousstructurebutalsotheuniformporesize.Moreover,theporediametersdidnotchangesignificantlyatdifferentweightratioof.../....Themostprobableporesizesofsamplesa1,a2,a3aredeterminedtobe2.71,2.50,2.44nm,respectively.Thestructuralparametersarelistedinfollowingtable.
P18
Thistablesummarizedthecatalyticactivityofcopper-modifiedporoussilicananotubeinthedirecthydroxylationofbenzenewithH2O2asoxidant.Thecatalystsshowedhighcatalyticactivity,anddirectproportionalrelationshipbetweenthebenzeneconversionandthelengthofthesilicananotube.ConsideringthesimilarcoppercontentdeterminedbyICP,thevariationsofcatalyticactivitieswereprobablycausedbydifferentretentiontimeofreagentinthenanotubewithdifferentlengths.P19
ItisSummaryandFutureResearch
Thispartofresearchcanbesummedupfromthefollowingthreeaspects.
Mophologycontrol,CatalyticactivityandFutureresearch
看thisslide.
P20
thanks
国际会议chairman主持词
国际会议开场白第二篇
TheFirstChinaUnconventionalGasSummit
Distinguishedguests,ladiesandgentlemen,
Goodmorning!
IamthechairwomanoftheChinaUnconventionalGasSummit.ItisagreatpleasureformetowelcomeyoutoBeijingtodiscussvariousaspectsofunconventionalgas.IhopethatthissummitwillprovideopportunityforacademicexchangeandcontributetothedevelopmentofunconventionalgasinChina.
NowIdeclaretheChinaUnconventionalGasSummitisopen!
Pleaseallowmetointroducetoday’sspeakers.TheyareYuanDandanandHuYing,whobothareprofessorsofChinaUniversityofPetroleum.Theywilljointlydeliveraspeechtitled“ProspectandDevelopmentofShaleGasinChina”.Let’swelcomethem.
ThanksprofessorYuanandProfessorHufortheirexcellentpresentation.Doyouhaveanyquestionsaboutit?
Anyotherquestion?
Thankyouagainforyourexcellentexplanation.
Okay,astimeislimited,Iamsorrytosaythatthissessionhastostophere.
Nowwecometotheendofthissummit.Onbehalfofallthemembersoftheorganizingcommittee,Iwishtoexpressoursinceregratitudetoallofyouwhohavesoactivelyparticipatedinthiscongresstomakeitsuchasuccess.
Andnow,IdeclaretheChinaUnconventionalGasSummitclosed.Thankyou!
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