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《摻雜納米TiO,2半導(dǎo)體光催化劑的制備與光催化性能研究》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、摻雜納米TiO：半導(dǎo)體光催化劑的制各與光催化性能的研究摘要自從上個世紀(jì)七十年代，人們發(fā)現(xiàn)納米氧化鈦的光致催化特性后，光催化研究領(lǐng)域成為科研工作者的研究熱點。對納米氧化鈦進(jìn)行改性，使其運用到環(huán)保領(lǐng)域，具有重大的實際意義。本論文采用溶膠一凝膠法制備出摻雜納米W03／Ti02粉體和摻雜Sn02／Ti02粉體；采用粒子凝膠法，浸漬提拉法在潔凈玻璃表面制各出均勻，半透明的摻雜WO／Ti02光催化膜和Sn02／Ti02光催化膜。探討了工藝參數(shù)：加入不同種類摻雜物質(zhì)，不同含量的摻雜量，不同熱處理溫度，對相組成，相變，晶粒尺寸及光
2、催化性能的影響。采用XRD．TEM．BET，AFM．可見光透過光譜分析，分光光度計測試手段對所制各的材料進(jìn)行表征，并分析各因素對光催化性能的影響。探討結(jié)果表明：采用溶膠一凝膠法能夠制備出具有光催化特性的納米光催化粉體；同樣采用粒子凝膠法，浸漬提拉法能夠制各出納米光催化薄膜。摻雜種類，摻雜量，熱處理溫度等因素會影響光催化性能。0．5％(nw03／nri02)，1％(ns。02／nTi02)摻雜(摩爾比)的樣品具有較高的光催化效率，分別可達(dá)96．35％，96．55％，其熱處理溫度為350℃．而相同含量的光催化膜降解率分
3、別為67．4％，79．6％，光催化膜的降解率要低于粉體的降解率。關(guān)鍵詞：光催化劑氧化鈦三氧化鎢二氧化錫摻雜半導(dǎo)體ASTUDYONTHEFABRICATIONOFDOPEDSEMICONDUTCTORNANOMETRETi02PHOTOCATALYSTSANDTHEIRPHOTOCATALYSTICPERFORMANCEABS’I’RAC’I’Sincephotocatalysticperformanceoftitaniumdoxidewasfoundin1970’S．photocatalysticresearche
4、rsontitaniumdoxidehavebeenstressedforenvironmentprotection．Inrecentyears，samiconductorphotocatalyrstshaveevodedtremendousinterestinthelighe-stimulateddegradationofaqueouspollutantsandatomospheriepollutants，Titaniumdoxide(TiO、_)photocatalysthasbeenthefocusofthe
5、investigations．particularlYbecauseofitshighphotocatalysticactivityanditsstabilitywithrespecttophotocorrosionandchemicalcorrosion．Bydopingtheperformanceoftitaniaischangedbetterandusedintheenvironmentprotection．whichhasmuchgreatsenseInthispaper，themethodsofprepa
6、ringnanometerdopedTi02andnanometerdopedthinfilmTi02coatedonglass-platewereinvestigated．Usingthesol-gelmethod．nanometerdopedTi02powderwasprepared．Usingthesol—gelmethodanddipcoatingmethodnanometerdopedTiO2thinfilmcoatedonglass—platewasprepared．Theeffectofthetech
7、nicalprocessparameters，suchasdifferentdoping．dopingamountandheattreatmenttemperatureSonphaseconstruction，phasetransformation，crystallinesizesandphotocatalysticperformancehasbeenstudied．usingXRD，TEM．BET，AFMandspectrophotometereta1．Theresultsshowthat，nanometerdo
8、pedTi02powderwaspreparedintherangeof5-20rim，andthedopedthinfilmTiO_,waspreparedintherangeof20-40nmbythesol-gelmethod．ThenanometerTi02photocata—lystsdopedwithW03at％20．5％andwithSn02a
