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1、沈阳理工大学学士学位论文摘要实验采用微弧氧化技术制备了钛网电极,以亚甲基蓝为待解降液,考察了微弧氧化制备条件如电解质种类､电解质浓度､微弧时间对亚甲基蓝的光催化和光电催化的脱色情况｡结果表明,6g/l的Na3PO4和5min的微弧时间是制备钛网的最佳条件｡采用微弧氧化负载Cu2+法修饰钛网电极｡当Cu2+的浓度为0.01mol/l,微弧氧化时间7min时,光催化和光电催化对亚甲基蓝的脱色率分别达到42.72%和42.26%｡另外,考察了多种因素对亚甲基蓝光电催化的脱色率影响｡根据单因素优化的步骤,最终确定了在5mg/l的亚甲基蓝,0.01mo
2、l/l的硫酸钠溶液,1.5cm的电解间距,3.0V的外加电压以及pH为5的情况下,光电催化对亚甲基蓝的脱色率达到45.0%｡以甲醛为目标降解物,光照催化120min,最佳性能的钛网对它的光催化和光电催化降解率分别为30.12%和21.90%｡关键词:微弧氧化;铜掺杂;钛网电极;甲醛I沈阳理工大学学士学位论文AbstractTitaniummeshelectrodesupportedontitaniumsubstrateswerepreparedbymicro-arcoxidation.Experimentadoptedmethyleneblu
3、easthetestmaterial.PhotocatalyticandphotoelectrocatalyticdecoloringrateofmethylenebluewerecarriedoutwithanaimtoinspecttheinfluenceofpreparationconditionsofTiO2suchaselectrolyte,electrolytecon-centration,andmicro-arctime.Theresultsshowedthat6g/LofNa3PO4and5minmicro-arctimeis
4、thebestconditionforthepreparationofTiO2thinfilms.Themethodofmicro-arcoxidationloadCu2+wasdeterminedtomodifytitaniummeshelectrodeWhentheconcentrationofCu2+was0.01mol/Landmicro-arcoxidationtimewas7min,thephotocatalyticandphotoelectriccatalyticdecolorationrateofmethyleneblueca
5、nreach42.72%and42.26%,respectively.Somerelevantfactorsinfluencingphotoelectriccatalyticdecolorationrateofmethylenebluewereinvestigated.Aftersinglefactoroptimization,wedrewaconclusionthatthedegradationofmethyleneblueratereached45.0%underthecircumstancesof5mg/lmethylenebluean
6、d0.01mol/lsodiumsulfatesolution,1.5cmelectrolyticspacing,3.0Vappliedvoltage,pHof5.Finallyformaldehydewasstudied,thephotocatalyticdegradationattained30.12%andphotoeletrocatalyticdegradationreached21.90%in2h.Kewords:micro-arcoxidation;copperdoping;titaniummeshelectrode;formal
7、dehyde;IV沈阳理工大学学士学位论文目录摘要IAbstractII目录III1绪论11.1引言11.2光催化技术21.2.1TiO2光催化剂的性质21.2.2TiO2降解甲醛的机理31.2.3影响光催化活性的因素41.3微弧氧化技术51.3.1微弧氧化技术的发展史51.3.2微弧氧化的特点和机理61.3.3微弧氧化的影响因素81.4TiO2光催化薄膜的改进技术91.5研究意义与内容101.5.1研究目的与意义101.5.2研究内容102实验部分112.1实验原料､试剂和仪器112.1.1实验原料:钛网､石墨､蛭石112.2.2实验仪器1
8、12.2.3实验仪器112.2实验材料预处理122.3实验方法与步骤133实验结果与讨论153.1亚甲基蓝最大波长的确定与标准曲线的绘制153.1.1亚甲基蓝最大波
