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ID:36540607
大小:2.13 MB
页数:78页
时间:2019-05-11
《化学气相法制备碳纳米管材料》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、西南交通大学研究生学位论文化学气相法制备碳纳米管材料笠姓级二oo四级申请学位级别墨茔亟±专业垫王堡逾鱼堑垫盔指导教师婆壹型塾撞至遂堑撞二oo七年五月西南交通大学硕士研究生学位论文第1I页TEM表征和氧化还原对【Fc(cN)6】3"/[Fe(CN)6】4。溶液和Na2S04溶液中进行循环伏安测试发现,浸渍5次,每次浸渍10rain并进行超声处理的基底制备的CNT-CME(5/10.S)表现出较好的电化学性能。在5~lOOmV·Sd的扫描速度下,5110.S的氧化峰电流和扫描速度的平方根成良好的线性关系。研究表明
2、,这种碳纳米管化学修饰电极是一种准可逆的电极。这不仅大大拓展了碳纳米管的应用范围,而且丰富和发展了电化学分析的内容和技术,在电化学分析方面将有更大的发展。关键词:LaNi03;碳纳米管;催化剂:柠檬酸;修饰电极西南交通大学硕士研究生学位论文第lII页AbstractInthisthesis,theeffectbetweencatalystandcarbonnanotubes(CNDgrowninChemicalVaporDeposition(CVD)methodwerestudiedandhowtOprepa
3、rechemicallymodifiedelectrodebasedoncarbonnanotubesgrowninsituwerecarriedoutbyCVDmethod.1.AseriesofLa-Ni-0compoundsweresynthesizedwithmodifyingthemolratioofLaandNibycitricacidcomplexometryandusedasthecatalystprecursorstoprepareCNTbyCVDmethod.Atthesametime,H
4、2,N2andC2H2wereusedasthereductiongas,protectiongasandcarbonsourCegas,respectively.ThestructuresofthecatalystprecursorsbeforeandafterreducingbyH2werecharacterizedbyXRDandthepatternsoftheCNTobtainedfromthecatalystprecursorswerecharacterizedbyTEM.The,resultssh
5、owedthattherewereonlychemicalcompoundsLaNi03andLa2Ni04intheseriesLa-Ni—Ocatalystprecursors.However,theyieldofCNTfromthecatalystprecursorLaNi03wasgreatlyhigherthanthatfromthecatalystprecursorLa2Ni04.AndthereasonWasthatthecontentofnano-metermetalNi(111)crysta
6、lfaceintheproductionsfromI.ANiOsafterbeingreducedwashigherthanthatfromLa2Ni04.Thatistosay,higherthecontentofnano-metermetalNi(111)crystalface;higheryieldofCNT,andlargerthesizeofthemetalNi(111)crystalface;largerinnerdiameterofCNT.。2.Carbonnanotubeswereprepar
7、edbyCVDmethodusingthecatalyst,whichwaspreparedbycitricacidcomplexometry.TheeffectofthedosageofcitricacidontheCNTyieldandmorphologyWasstudied.ThetransmissionmicroscopyWasusedtocharacterizeCNTmorphology.CNTyieldisabout1345.8%(1”ata2:1toolrationofcitricacidand
8、metalion,CNTdiameterisrelativelynarrowdistributedandCNTwallisslick.西南交通大学硕士研究生学位论文第1V页Butwhentoolrationofcitricacidandmetalionis3:1,CNTyieldisabout407.2%(1h),andtheobtainedCNTdiameterisrelativelywidedi
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