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ID:32470572
大小:2.21 MB
页数:73页
时间:2019-02-06
《改性纳米二氧化钛的制备及其光催化降解性能的研究》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、改性纳米二氧化钛瓣制备及其光催仡链髓的磷究摘要,‘i当今整界,环境污染藏勰着入类的生存,蒂8约着入类的发鼹,因此爝予环壤最护熬赫枣孝秘藏必入髓关注鹣热患。纳涨Ti02毙继豫裁怒遴卡年寒鼗广泛磷究鲢一种巍型环缳槠辩,它能降解腹液、淡水,杀死缀菌瘸霉,可以应鞭在废水蛉缝璎,室凌环壤豹挣化簿蚤方匿,鸯广泛瓣发展裁爨。健髓02走催织裁对紫外先的倚赖,限制了它煎寝爝,同时它的催仡效攀以及使用寿命簿阏藤也影蝻了宅瓣广泛经熏。y本研究利用溶蔽一凝胶法制蠡出掺祭铁殿铁锌复会殴瞧数纳米"ri02怒健亿裁。涎臻差热一熬薰分掇法(DTA-TG)、X蹇重线愆瓣(XRD)、透射电子显微镜(TEM
2、)、X射线光电予能港(XPS)、筑终光扫捺谱(FT-IR)、分巍必度诗等现代灏试技本分耩籁稀究了簇备麓纳漱戢02稳徽辫绪檎,组织霸性麓,探讨了影响纳米∞02光镁化溲姥鼹器种因素。,?磷宠结栗袭鲷,澍臻溶获~凝获法胃数获褥霸寒缀=裁健钛,辇~潞粒尺寸强5--30nm。在戳瀑下(小予500。c)烧缮的粉体鲍团聚,j、予毫溢下烧臻熬粉俸,颡狡度为20一90蛳,裔较大豹诧表瑟获(50--100m2/g)。铁及镣的掺杂会降低锐钛鼹囱众红石躲转交滋度。掺杂F≯+at%=20%的襻燕,300℃烧续3小嚣尊在隧光下对译蒸橙的簿瓣牵搿遮到90%以上。商掺杂F矿+at%=20%,Fe”fz
3、毋。at%=50%懿撙熬,300℃浇缝§小孵鸯羹姆筑光镶睨效率。毫稻瓷强竞下酌催纯活性都好于DegussaP25。确定最镶金红螽含量约为52%。炎/?关键谶;二鬣钯强/F≯+掺影溶胶一凝黢太戮髓《—/。Fe3+/Zn:+掺萎荦基橙涕染旋窳\/7\/ASTUDYONTHEPREPARATIONOFDOPINGNANOMETERTITANIAANDIT’SPHOTOCAⅨLYTICDEGRADATIONPEREORMANCEABSTRACTNowdays,environmentalpollutionmenaceshumanbeing’Slivingandlimitsthes
4、ocialdevelopment.Studiesonthefunctionalmaterialsforenvironmentalprotectionhavebeenstressed.NanometerTi02photocatalyst,asanewfunctionalmaterialforenvironmentalprotection,hasbeenstudiedforabouttenyears.Itcantreatwastewaterandexhaustgas,killbacteriaandviruses.Soitcanbeusedtotreatwasteliquid
5、s,purifyair,andSOon.Inaword,Ti02hasawideapplicationprospect.Howeverit’Ssuchproblemsasrelayingonultravioletradiation,efficiency,andlifetimeinTi02’SUSe1imitit’SapplicationInthispaper,pureFe"-doped,andFe3+/Zn2+.dopednanocrystallineTi02photocatalystswerepreparedbySol·Gelprocesses.Thecomposit
6、ion,micro-structureandpropertiesofthepreparedTi02powderswerecharacterizedbyDTA—TG,X1LD,TEM,XPS,FT-IKspectrophotometer,andSOonThefactorsinfluencingTi02photocatalysticpropertieswerediscussedResultsshowedthatTi02crystallinediameterswereintherangeof5-30nmConglomerationsofpowdersinlowertemper
7、atureweresmallerthanthatinhighertemperatureGraindiameterswereintherangeof20—90nmTi02crystal’Ssuperficialareaswereintherangeof50—100m2/gIronandzincdopingcanlowerthetransformationtemperatureofanatasetorutile.Photocatalyticactivitywasevaluatedbythedegradationofmethlicinthesu
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