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1、萬方數(shù)據(jù)39卷第2期人工晶體學(xué)報v。1.39N。.22010年4月JOURNALOFSYNTHETICCRYSTAL5April.2010化學(xué)沉淀法制備納米Fe/Ti02及其光催化活性的研究陳桂華1,葛昌華1,潘富友1,趙波1,楊輝2,王明星1(1.臺州學(xué)院醫(yī)藥化工學(xué)院,臨海317000;2.浙江大學(xué)納米科學(xué)與技術(shù)中心,杭州310027)摘要:以TiCI。為鈦前驅(qū)體,氨水為沉淀劑,氯化鐵為摻雜離子給體,采用化學(xué)沉淀法,制備了純的與鐵摻雜的TiO:納米光催化劑。采用XRD、差熱-熱重等分析方法對產(chǎn)物進(jìn)行了表征。通過苯酚水溶液的光催化降解實(shí)驗(yàn)研究了樣品的光催化性能,考察了Fe”摻雜量、苯酚
2、溶液的pH值對光催化活性的影響。結(jié)果表明:Fe¨摻雜抑制了晶粒長大,細(xì)化了晶粒。Fe“取代晶格中Ti4+的位置或進(jìn)入間隙位置,引起晶格畸變。適量的Fe3+摻雜能減少光生電子與空穴的復(fù)合,提高光催化劑的光催化性能。在本實(shí)驗(yàn)條件下,F(xiàn)e“摻雜量為0.1m01%,苯酚溶液的pH為9時,納米Ti02具有最佳的光催化性能,在加w紫外燈照射下降解16h,降解率達(dá)到89.3%。關(guān)鍵詞:光催化劑;化學(xué)沉淀法;苯酚;二氧化鈦中圖分類號:0648文獻(xiàn)標(biāo)識碼:A文章編號:1000-985X(2010)024)433-07PreparationandPhotocatalyticActivityofNanopa
3、rticleFe/Ti02byChemicalPrecipitationMethodCHENGui—hual,GEChang—hual,PANFu—youl,ZHAOB01,YANGHui2,WANGMing.xin91(1.SchoolofPhannaemaiealandChemicalEngineering,TaizhouUniversity,Linhai317000,China;2.CenterofNano—ScienceandTechnology,ZhejiangUniversity,Han礎(chǔ)Oll310027,China)(Received16September2009,ac
4、cepted2』口,Ⅻn,y2010)Abstract:ThepureandFe—dopedTi02nanoparticlesphotocatalystwerepreparedbychemicalprecipitation,usingtitaniumtetrachlorideasTi·precursor,ammoniaasprecipitantandferricchloride船doping—iondonor.ThesampleswerecharacterizedbyX—raydiffraction(XRD)andthermogravimetryanddifferentthermala
5、nalysis(TG—DTA).Thephotocatalyticactivitywasevaluatedbythephotocatalyticdecompositionofphen01.TheeffectsofthedopingcontentofFe3+andphenolsolutionpHontheactivitywereinvestigated.TheresultsshowedthatFe3+dopingretardsthegrowthofgrainsize.Fe3+locateatintersticesoroccupysomelatticeofTi02,whichleadtoc
6、rystallatticedistortion.AnappropriateamountofFe”inTi02powdersreducestherecombinationofphoto—generatedholesandelectrons,whichcontributetotheenhancementofthephotdcatalyticactivityofFe3+一dopedTi02.Inthisexperimentalcondition,Ti02nanoparticleshavetheoptimalphotocamlyticpropertywhenthedopingcontentof
7、Fe3+is0.1m01%andpHofphenolsolutionis9:thedegradationefficiencyofphenolis89.3%after16hirriationusing20WUVlight.Keywords:photocatalyst;chemicalprecipitationmethod;phenol;titanium—dioxide--—------—-..----.-----------------.----