Ti基体上碳纳米管合成与修饰与其储氢性能分析

《Ti基体上碳纳米管合成与修饰与其储氢性能分析》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、ABSTRACTCarbonnanotubes(CNTs)areseamlesshollowtubesobtainedbyrollinggraphenewithsingleormultilayersalongagivendirectionandreconnectingthecarbonbonds，whicharerichinone-dimensionalnanopores．Becauseoftheirsmallscaleintheradialdirection，CNTshavelargespecif

2、icsurfacearea．CompositescomposedofCNTsandmetals，whichutilizethespecialmicrostructureofCNTsandthehydrogenadsorptionbehaviorofmetals，arepromisingmaterialsforhydrogenstorage．Inthispaper，catalystsontitaniumpowderswerepreparedbydeposition-precipitationmetho

3、d，andCNTsWeresynthesizedontitaniumpowdersbychemicalvapordepositionmethod．Theeffectsofthekindsofcatalysts，thecontentsofNiinNi／Ticatalysts，andtheCNTssynthesizedtemperaturesWerestudiedindetails．ExperimentresultsrevealthatwhenNiiSselectedascatalyst,CNTsCan

4、besynthesizedonthetitaniumpowderat550oC．Underthistemperature，theCNTs／TicompositepowdersweresynthesizedwithdifferentNicontentsinNi／Ticatalysts．TheelectrochemicalhydrogenstorageresultsshowthatwhentheNicontentis3wt％，theelectrochemicalhydrogenstoragecapaci

5、tyofCNTs／Tisampleishighest．H2adsorptiontestindicatesthatH2isadsorbedintoCNTsbyphysicaladsorptionat25oCand-196oC，whileCNTs／TiadsorbsH2bychemicalandphysicaladsorptionat300oC．AtthesameH2pressure，thehydrogenstoragecapacityofCNTs／Tiat300oCishighestamongthet

6、hreetemperaturesconsideredinourresearch．WealsostudiedtheeffectofballmillingonthehydrogenstoragepropertyofCNTs／TisampleswhicharemixeddirectlywithpureTipowderandCNTs．Afterballmilling，thelengthsofCNTsareshortenandthedefectsinCNTsisincreased．Itisfoundthatt

7、heelectrochemicalhydrogencapacityofCNTscanbeimprovedbytheballmillingprocess．Theball-milledCNTs／TicompositepowderscalladsorbH2byphysicaladsorptionat25oCand-196oC，andabsorbH2bychemicalandphysicaladsorptionat300。C．Amongthethreetemperatures，thehydrogenstor

8、agecapacityofthebali-milledCNTs／Ticompositepowdersat300。Cishighest．TheeffectofsurfacemodificationonimprovinghydrogenstoragecapacityofCNTswasalsostudied．Ti02nanoparticlesWereloadedontheCNTsbys01．gelI．．黛^-．●ll^method．Experimentresultsreve