wo3和moo3一维纳米材料的合成及其应用研究

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1、兰州大学博士学位论文摘要关键词：水热法，W03纳米线，M003纳米带，锂离子电池，紫外探测器。Ⅱ兰州大学博士学位论文AbstractAbstractOne-dinmensional(1D)nanomaterialshavebeensignificantlyattractedattentionsduetotheiruniquestructureandproperties．Inthispaper,1DW03andM003weresynthesizedbyhydrothermalmethod．Morphologiesandmicrostruct

2、uresofas-synthesizedproductswerecharacterizedbyXRD，SEM，RAMAN，FTIR．Effectofgrowthparametersonnanostructureswasclarified，growthmechanismsofthenanostructureswerediscussed．h-W03nanowireshavebeensynthesizedbyhydrothermalmethod．Anyonedifferentexperimentalparameterscallleadtothe

3、differentstructuresandmorphologiesofthefinalproductsinthisexperiment．Theelectrochemeicalperformancesoftheas-synthesizedh—W03nanowiresasanodematerialsofLi-ionbatterieshavebeeninvestigated．Forh-W03nanowireselectrode，theseconddiachargecapacityatcurrentdensityof0．05inA／cm2arr

4、ivedat264mAh／g．ARer15thcycles，thedischargecapacitycanreachasteadystate．Themeancoulombicefficiencyofh-W03nanowireselectrodeduringthethecharge／dischargetestatcurrentdensityofO．05Ilia／era2ismorethan90％．Theelectrochemeeialperformanceofh—W03nanowireselectrodeisthebestbetween1．

5、0-4．0VUltraviolet州)photodetectorswerefabricatedbasedonindividualW03nanowires．Electricaltransportmeasurementsshowthattheas-synthesizedh-W03nanowiresareofn-typesemiconductors．Thedivicecharacteristics，includingspectralresponseandtimeresponse，werestudiedsystematically．Itisfou

6、ndthattheW03nanowiresshowedthehigestlightsensitivityat312nm．Andthephotodetectorsshowhighstabilityandreversibilityto312nmUVlightwithallintensityof2mW／cm2．TheShottkytype(ST)photodetectorsandOhmictype(ODphotodetectorshavebeeninvestigated．Theresultshowsthatthesensitivityandre

7、sponseratehavebeenimprovedbyshottleycontact．a-M003nanoribbonshavebeensynthesizedbyasimplehydrothermalmethod．Theas·synthesizedproductswereupt05ttminlength，200nnlinwidth，20nminⅢ兰州大学博士学位论文Abstractthickness．neinfluenceofhydrothermaltemperature，reactiontimeandPHvalueORthes仃uct

8、ureandmorphologyoftheproductshavebeeninvestigated．whenthehydrothermaltemperaturewas80oC，themetas