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《活性炭負(fù)載fezn摻雜納米tio2半導(dǎo)體光催化劑的制備與光催化性能研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、活性炭負(fù)載Fe＼zn摻雜納米Ti02半導(dǎo)體光催化劑的制備與光催化性能研究摘要近年來(lái)，隨著生存環(huán)境的惡化，用半導(dǎo)體光催化劑光致降解廢水和空氣中的污染物技術(shù)引起了人們巨大的關(guān)注。氧化鈦由于其優(yōu)異的性能成為研究者關(guān)注的焦點(diǎn)。對(duì)納米氧化鈦進(jìn)行改性，并應(yīng)用到環(huán)保領(lǐng)域，具有重大的實(shí)際意義。本論文在前人的研究基礎(chǔ)上采用溶膠一凝膠法，在顆?；钚蕴?GAC)表面負(fù)載Fe／zn摻雜Ti02光催化膜。探討了不同熱處理溫度，對(duì)相組成，相變，晶粒尺寸及光催化性能的影響。采用XRD、BET、紫外．可見(jiàn)光分光光度測(cè)試手段對(duì)所制備的材料進(jìn)
2、行表征，并分析各因素對(duì)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活性炭負(fù)載光催化劑，成膜助劑的加入，涂膜次數(shù)、熱處理溫度等因素會(huì)影響其光催化性能。500℃熱處理的活性炭負(fù)載Fe，zn摻雜Ti02樣品具有最高的光催化效率，光照2小時(shí)后降解率達(dá)到97．3％，而相同含量的粉體降解率為41．6％。活性炭負(fù)載可以大大提高Ti02的光催化性能。關(guān)鍵詞：光催化劑二氧化鈦活性炭Fe、zn摻雜AStudyOnthePreparationofFe＼ZnDopedNanometerTi02Photocatalys
3、tCoatedonActivitedCarbonandItsPhotocatalysticPropertyABSTRAC’I’Inrecentyears，semiconductorphotocatalystshaveevokedtremendousinterestinthe1ight-stimulateddegradationofaqueouspollutantsandatomosphericpolIutantsalongwiththeentironmentaldeterioration．Titaniumd
4、oxide(Ti02)photocatalysthasbeenthefbcusoftheinVestigations，becauseofitsoutstandingproperty．1thasgreatpracticalValuetoinlproVethephotocatalyticperfbrmanceofTitaniaandapplyittoentironmentalprotection．Inthispaper，preparationFe＼ZndopedTi02coatedongranularactiV
5、atedcarbonbytheparticlesol-gelmethod，whichwerebasedonthepredecessor’sstadies，wasinvestigated．TheeffectofdifIerentheattreatmenttemperaturesOnphaseconstitution，phasetransformation，crystallinesizesandphotocatalysisperformancehasbeenstudiedusingXRD，BET’andU、，-
6、Visspectrophotometer．Theresultsshowedthat，photocatalystcoatedongranularactivatedcarboncanbepreparationbythesol—gelmethodanditsphotocatalyticperformanceisaff色ctedbyaccelerantadditive，coatingtime，andheattreatmenttemperature．TheFe、ZndopedTi02coatedongranulara
7、ctivatedcarbonheattreatedat500℃demonstratedthehighestphotocatalyticperformance：methylorangesolutionwas97．3％decomposedin2hours，cOmpafingt0thaton】y41％decOmposedw“hOutactivatedcarboncarrier．Theus{ngofaetiVatedcarboncarriercanimprovethephotocatalyticDerfbrmanc
8、eoftitania．Keywords：photocat_lysttitani魚(yú)矗ctivatedcarbonFe、zndoped插圖清單圖1．1銳鈦型和金紅石型晶型結(jié)構(gòu)圖????????????·3圖1．2sn02／Ti02耦合體系電荷分離機(jī)理???????????··6圖2．1普通方法制各的未經(jīng)過(guò)熱處理的Ti02的XRD圖??????·-16圖2．2S01．Gel法制備Ti02粉體實(shí)驗(yàn)流程??????????
