竞标ppt演讲开幕词.docx
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竞标ppt演讲开幕词.docx
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竞标ppt演讲开幕词
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竞标ppt演讲开幕词
篇一:
国际会议口头报告ppt演讲内容准备模板
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:
Iamsohonoredtobewithyoutocommunicateacademicquestionsandideas.
Thetileofmyacademicpresentationis“Thepreparationandcatalyticperformanceofporoussilicananotubefunctionedwithheteroatoms”
Ishallonlytaketenminutesofyourtime.
Iwilltalkaboutthetopiconthepreparationofporousmaterials.
p2
Firstofall,iwannaintroducemyself.Icomefromnanjinguniversityoftechnology,nanjingcity,china.
p3
Thecontentislistedasfollows.
p4
Allourresearchesareconductedbytheacademicthoughts.generallyspeaking,wearecommittedtoporousmaterials.Inordertoexplorehigh-performancefunctionalizedmaterialsforpilotexperimentsandscale-upproduction;wetunethestructure,suchascompositionandmorphologystepbystepandoptimizethemfurther.what’smore,thepossiblesynthesismechanismsarealsoinvestigated.Today,thepresentationisbasedontheright-handbranch.
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.
ThexRDpatternsshowedfourreflectionpeaksattributedto(100),(110),(200)and(210),respectively,duetothehexagonalsructure.
p12
Then,wekeepthesameamountof...,increasingtheamountof....
wefoundthatthelengthincreasedgradually.ThexRDpatternsalsoshowedthehexagonalsructureofsamplesb1,b2,b3,b4.
p13
moreover,anadditionalproofofthehexagonalsymmetrystructureisgivenbyTemandtheFTpattern.Then2adsorption-desorptionisothermsofthesamplesb1,b2,b3,b4exhibitatypicaltype-IVisotherm.
Accordingtothetableofstructuralparameters,wecanfindthatthespecificsurfaceareaandtotalporevolumeincreasegradually,thethicknessofwalldecreaseandthereisnoobviouschangeindiameter.
p14
Furthermore,thepossiblesynthesismechanismofthemesoporoussilicananotubeindualtemplatessystemwasproposed.wesuggestthatduetoelectrostaticrepulsionbetweenpositivelychargedammoniumionsfromhydratedammoniamoleculesandhydrophilicgroupsof...,especiallyinammonia(nh3,25wt.%)solution,thehighconcentratedammoniumionsprovideacrowdedandrepulsivespacetopreventtheconjunctionof...molecules,leadingtotheformationoftherod-likemicellesastemplatetoformporestructureinstead
ofsphere-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
篇二:
ppT大赛主持词
ppT大赛主持词
男:
尊敬的各位来宾
女:
亲爱的同学们
合:
大家晚上好!
女:
青春如歌,激情似火,知识作伴显蓬勃朝气。
男:
扎实基础,学以致用,专业护航谱美丽人生。
女:
这里是青海大学计算机协会“喜迎十八大”ppT大赛的现场,欢迎大家的到来!
男:
在我们的比赛正式开始之前,请允许我向大家隆重介绍今晚的评委,他们是:
女:
让我们再次以热烈的掌声欢迎他们的到来!
男:
接下来,对于今天ppT大赛的规则,我来为大家做一个简短的说明:
此次ppT大赛的评分标准主要分为两个方面:
ppt制作水平60分、演讲水平40分。
女:
好了,现在,我们就把时间交给各位参赛选手们。
首先欣赏的是,一号选手?
?
男:
感谢一号选手的精彩表演。
下面就有请二号选手?
?
女:
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男:
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宣布前三组成绩
男:
?
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女:
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男:
?
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宣布成绩
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男:
感谢?
?
的精彩表现,下面请评委进行点评
宣布最后一组选手得分
女:
本次ppT大赛的决赛晋级名单将于下周一以海报的的形式贴出,请参赛选手留意查看
男:
时间的流逝总是在不经意间,到此我们的活动也便接近尾声女:
青春有限,创意无限,本次青海大学计算机协会ppT大赛初赛到这就要和大家说再见了
男:
再次感谢各位评委的到来,感谢为此次比赛付出辛勤劳动的工作人员和参赛选手,感谢现场各位观众的积极参与。
朋友们,决赛见!
女;决赛见
篇三:
ppT大赛主持串词
ppT大赛主持串词
非常感谢一号选手给我们带来的精彩展示,下面让我们跟随来自xx宿舍的xxx同学一起来感受他们的ppT世界。
感谢xx同学给我们带来的美妙的视觉享受,下面有请xx上台展示。
感谢xx同学带我们了解了xx,下面有请xx同学上台展示,xx同学做准备。
欣赏完了xx的精心制作的作品,我们来看看下一位选手的精彩演示。
有请xx班xx同学。
(关于大学生活主题的ppT串词)大学让我们感受到了烟花的灿烂,大学让我们感受到了糖果的美味,大学还给我们带来了什么呢?
下面让我们来看看xx班xx给我们带来的精彩展示。
下面让我们来有请x号选手,来自xx班的xx同学给我们带来的作品,掌声有请
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