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1、本科毕业设计（论文）题目掺杂TiO2纳米材料的制备及其光催化性能学生姓名白文帅学号201005030209院（系）材料与冶金工程系专业班级应用化学指导教师韩选利时间2014年6月13日摘要本文采用溶胶凝胶法，制备了纯TiO2及Fe掺杂、V掺杂的TiO2前躯体干凝胶，干凝胶在煅烧温度为500℃、煅烧时间为5h的条件下合成了纯TiO2、Fe掺杂、V掺杂的TiO2粉体。以亚甲基蓝溶液为模拟污染物在紫外光下进行了光催化实验，测试了掺杂元素对TiO2的光催化性能和改性效果。主要内容及结果如下：（1）利用溶胶凝胶法制备了纯TiO2和铁掺杂TiO2前躯
2、体干凝胶，干凝胶在煅烧温度在500℃、煅烧时间为5h的条件下制备了不同铁掺杂量的TiO2粉体，掺Fe量分别为：0.01%，0.03%，0.05%，0.07%，0.1%；紫外光下下照射含Fe0.03%的TiO2降解亚甲基蓝溶液180min其降解度可达99.5%，而纯TiO2有65.4%。（2）利用溶胶凝胶法制备了V掺杂TiO2前躯体干凝胶，干凝胶在煅烧温度在500℃、煅烧时间为5h的条件下制备了不同钒掺杂量的TiO2粉体，掺V量分别为：0.3%，0.6%，1.0%，1.6%，3.0%；紫外光照射120min掺V1.0%的TiO2对亚甲基蓝溶
3、液的降解度达98.7%。结果表明：在实验条件下，掺杂Fe的摩尔分数为0.03%时，TiO2纳米粉体粒子具有较佳的光催化性能。掺杂V的摩尔分数为1.0%时，TiO2纳米粒子具有较佳的光催化性能。关键词:溶胶凝胶法；铁掺杂；钒掺杂；二氧化钛；光催化；亚甲基蓝第2页AbstractSolgelmethodisappliedinthisarticle,thepreparationofapureirondoping,vanadium,titaniumdioxideandtitaniumdioxidebeforebodydrygel,drygelin
4、calcinationtemperatureis500℃,burningtimeof5hwassynthesizedundertheconditionofpuretitaniumdioxide,dopedwithironandvanadiumdopedtio2.Withmethylenebluesolutiontosimulatepollutantsunderuvlightphotocatalyticexperimentwascarriedout,toverifythedopingelementsonthemodificationeffe
5、ctoftitaniumdioxide,andthemodificationmechanismisanalyzed.Themainresultswereasfollows:(1)waspreparedbysolgelmethodinpureTiO2andirondopedTiO2beforebodydrygel,drygelincalcinationtemperatureat500℃,calcinationtimeof5hwaspreparedundertheconditionsofdifferentirondopingamountoft
6、itaniumdioxidepowder,respectively,0.01%,0.03%,0.05%,0.07%,0.1%;UltravioletlightanddownlightcontainingFe0.03%TiO230minthedegradationdegreeofdegradationofmethylenebluesolutionis99.5%,comparedwith65.4%pureTiO2。(2)waspreparedbysolgelmethodbeforebodydrygel,vanadiumdopedTiO2xer
7、ogelincalcinationtemperatureat500℃,calcinationtimeof5hwaspreparedundertheconditionofdifferentamountofvanadiumdopedTiO2,respectively,0.3%,0.6%,1.0%,1.6%,3.0%;Uvirradiation20mindopedvanadium1.0%ofTiO2onthedegradationofmethylenebluesolutiondegreeupto98.7%.Resultsshowthatunde
8、rtheexperimentalconditions,thedopingFemolefractionof0.03%,TiO2nanoparticlehasthebestphotocatalyt
