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Synthesis and Characterization of W03 Loaded Ti02 Nanotube Arrays Electrode and Its Photocatalytic Activity  
Synthesis and Characterization of W03 Loaded Ti02 Nanotube Arrays Electrode and Its Photocatalytic Activity
資料類型: PDF文件
關鍵詞: w03  -ti02  nanotube  arrays  cathodic  electrodeposition  photoelectrocatalysis  
資料大小: 98K
所屬學科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強聚合物會議文集(2013.6.2-6 武漢)
簡介:
W03loadedTi02nanotubearrayselectrodewaspreparedbycathodicelectrodepositingW03ontoTi02nanotubearrayssubstrateundersquarewaveformpulses,andthesubstratewasobtainedbypotentiostaticanodizationofTiinaggressivemedia(NH4F,H20,andGlycerol).Thesolutionforelectrodepositingconsistsinamixtureof5mMNa2W04,20mMH202and70mL40%isopropanolsolutionacidifiedatpHl.2byperchloricacidaddition.Squarewaveformpulseswereappliedonthesubstratewithcathodicpulsepotentialsof-0.24VvsSCEforW03deposition,withthepulsedurationof100ms,followedbyapotentialpulseatoVfor1000ms.Photoelectrochemicalcharacterization,microscopiccharacterizationandtheeffectofplatingparametersoncatalystactivitywerestudied.W03loadedTi02nanotubearrayselectrodedemonstrateda100%increaseinphotocurrentundervisiblelight(A=550nm)comparedtothatofthesubstratewithoutW03loading.TheenhancedphotocurrentwasduetotheexpandinginvisiblelightactivityandthesemiconductorbandcouplingbytheloadingofW03.Thelatterleadstoelectronandholetransferbetweenthetwomaterialsinoppositedirections,whicheffectivelyreducesthephotogeneratedelectron-holerecombinationrate[l].
作者: D. Zhang,Y. R. Zhang
上傳時間: 2013-07-03 14:13:31
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