改性纳米二氧化钛的制备及其光催化降解性能的研究

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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