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1、2011ChineseJournalofCatalysisVol.32No.1文章编号:0253-9837(2011)01-0036-10国际版DOI:10.1016/S1872-2067(10)60157-X研究论文:36~45Ag@AgCl修饰的锐钛矿相TiO2纳米管的制备及其光催化性能温艳媛,丁旵明华东师范大学化学系,上海200062摘要：首先采用水热合成法和双氧水处理制备了具有锐钛矿相的TiO2纳米管,然后通过沉淀和光化学反应将Ag@AgCl纳米粒子负载于其上,从而制得TiO2纳米管负载的表面等离子体光催化剂.结果表
2、明,经Ag@AgCl纳米粒子修饰后,锐钛矿相TiO2纳米管因表面等离子共振效应而对可见光具有明显的响应,光生电子-空穴对更容易分离,因而TiO2纳米管的可见光催化活性提高.该催化剂对亚甲基蓝分子具有很强的吸附能力,可见光下照射1h后即可完全降解脱色.另外,该光催化剂重复使用5次后,亚甲基蓝脱色率仍保持在90%以上.关键词：银;氯化银;二氧化钛;纳米管;表面等离子共振;可见光响应;光催化;亚甲基蓝中图分类号：O643文献标识码：APreparationandPhotocatalyticActivityofAg@AgClModi
3、fiedAnataseTiO2Nanotubes*WENYanyuan,DINGHanmingDepartmentofChemistry,EastChinaNormalUniversity,Shanghai200062,ChinaAbstract:ThecombinationofTiO2nanotubesandasurfaceplasmonresonance(SPR)photocatalystusedtheirlargeadsorptioncapacityandwidevisiblelightresponse,respect
4、ively,andasynergisticeffecttoenhancephotocatalyticactivityundervisiblelightirradiation.AnataseoTiO2nanotubeswerepreparedbyhydrothermalsynthesis,ahydrogenperoxidetreatment,andcalcinationat400C.AgClnanoparticleswerethenloadedontotheTiO2nanotubesbyaprecipitationreacti
5、on,andsomeoftheAgClparticleswerereducedtoAgparticlesunderhalogentungstenlampirradiation.ThisgaveavisiblelightSPRphotocatalystofAg@AgCl/TiO2nanotubesthatexhibitedhighphotocatalyticactiv-ity,whichwasduetoitslargeadsorptioncapacity,widevisiblelightresponseduetotheSPRe
6、ffect,fastseparationofphotogeneratedelec-0−tron-holepairs,andstrongoxidizingabilityofClgeneratedbycombiningClionswithphotoexcitedholes.Methylenebluedyewasthor-oughlydecolorizedwithin1hinthepresenceofthisphotocatalystundervisiblelightirradiation.Inaddition,thephotoc
7、atalystwasstableafterrecyclingthephotocatalyticreactionfivetimes.Keywords:silver;silverchloride;titaniumdioxide;nanotube;surfaceplasmonresonance;visiblelightactivation;photocatalysis;methyl-eneblueTiO2是一种常用的光催化剂,具有催化活性高、进行了各种改性和修饰,如贵金属沉积、半导体复化学和光稳定性好、安全无毒和廉价易得等优点,因
8、合、离子掺杂、光敏化以及表面还原处理等.同时,而广泛用于有机污染物降解、消毒灭菌和自清洁等TiO2纳米管具有比其纳米粉体更大的比表面积,更领域.但是,作为一种n型半导体,TiO2能带隙较强的吸附能力和表面活性,因此可望显著增强TiO2[1]宽,使其只能被仅占太阳光3%~5%的紫外光所激的光
