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1、第28卷第1O期無機化學(xué)學(xué)報Vol_28No.102012年l0月CHINESEJ0URNALOFIN0RGANICCHEMISTRY2248.2256摻鎂鈦酸鋇納米棒的水熱合成和光催化性能林雪12關(guān)慶豐,1李海波3巴春華2王丹丹2孟繁駿2(江蘇大學(xué)材料科學(xué)與工程學(xué)院,鎮(zhèn)江212013)(2吉林師范大學(xué)化學(xué)學(xué)院,環(huán)境友好材料制備與應(yīng)用教育部重點實驗室,四平136000)(吉林師范大學(xué)物理學(xué)院,四平136000)摘要:用水熱法制備摻鎂鈦酸鋇(BaMgiO,=0,O.10,0.20,0.30,0.40),BMT)~粉體。運用X射線衍射儀(XRD)、場發(fā)射掃描電子顯微鏡(FESEM)、
2、透射電子顯微鏡fEM)、紫外可見漫反射光譜技術(shù)(DRS)等手段對樣品進行了表征,并在可見光照射下于溶液中考察了其光催化降解甲基橙反應(yīng)活性。結(jié)果表明,通過控制氫氧根濃度可以得到不同形貌的納米粉體?;诓煌瑮l件下制備的樣品的微結(jié)構(gòu)分析.提出了這些不同形貌的形成機制。制備出的BMT材料的帶隙能約為2.6lev光催化反應(yīng)結(jié)果表明BMT的光催化活性比摻氮TiO高得多。0H.濃度為8tool·L-時制備的BMT納米棒光催化效率最高,經(jīng)可見光照射360min,濃度為0.01mmo].L甲基橙溶液的降解率可達(dá)到93.0%,且循環(huán)使用4次后,其光催化活性并沒有明顯降低.表明BMT是一種穩(wěn)定有效的可
3、見光催化劑.關(guān)鍵詞:鈦酸鋇;摻鎂;納米結(jié)構(gòu);水熱合成;光催化降解;可見光照射中圖分類號:0643文獻(xiàn)標(biāo)識碼:A文章編號:1001.4861(2012)10.2248.09HydrothermalSynthesisandPhotocatalyticPropertiesofNanostructuresMagnesiumDopedBaTiO3LINXueGUANQing—Feng’LIHai—BoBAChun—HuaWANGDan—DanMENGFan—Jun(SchoolofM~edalsScienceandEn~needng,Jiangsu西eZhenjiang,Jiangsu21
4、2013,China)(~CollegeofChemistry,KeyLaboratoryofPreparationandApplicationEnvironmentallyFriendlyMatedalsoftheMin~tryofEducation,JilinNormalUniversity,Siping,Jilin136000,China)f3CollegeofPhysics,inNormalUniversity,Siping,Jilin136000,China)Abstract:Magnesiumdopedbariumtitanatephotocatalysts(Ba(1
5、MgO3~=0,0.10,0.20,O.30,0.40),BMT)weresynthesizedbyafacilehydrothermalprocesswithouttheuseofanysurfactantsortemplatesandcharacterizedbyXraydiffraction(XRD),fieldemissionscanningelectronmicroscope(FESEM),transmissionelectronmicroscope(TEM),andUV.Visdiffusereflectancespectroscopy(DRS).FESEMresul
6、tsshowthatdifferentmorphologiescouldbefabricatedbysimplymanipulatingtheconcentrationsofhydroxideions.Inthiscase.hydroxideionsseemtoplayakeyroleincontrollingtheformationofseedsandgrowthratesofBMTparticles.Onthebasisofstructuralanalysisofsamplesobtainedatdifferentconditions,apossiblemechanismfo
7、rtheformationofthesedistinctivemorphologiesisproposed.UV.VisDRSresultsdemonstratethatthebandgaDofBMTsampleisabout2.61eV.Theas.preparedBMTphotocatalystsexhibitehigherphotocatalyticactivitiesforthedegradationofmethylorange(MO)undervisible1ighti