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ID:52389999
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时间:2020-03-27
《自掺杂TiO2纳米管液相制备及光催化性能.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第30卷第1O期无机化学学报V01.30No.102014年10月CHINESEJOURNALOFINORGANICCHEMISTRY2308.2314自掺杂TiO2纳米管:液相制备及光催化性能孙杰★Il孙鹤2孙文彦31天水华天微电子股份有限公司,天水741000)(甘肃省天水市解放路第一小学,天水741000)(天水第十中学,天水741029)摘要:采用水合肼fNH·HzO)作为还原剂,在液相环境中制备了自掺杂TiO纳米管阵列(NTs)。利用FE—SEM、EDS、XPS、XRD、Raman、UVVis/NIR分光光度法以及半
2、导体特性分析系统(KeithleY4200scs)分别对样品的形貌.晶体结构.光学特性以及电学性能进行了表征。结果表明:通过这种方法制备的自掺杂TiO2NTs在带隙中引入了大量的氧空位.创造了氧空位能级.从而提高了样品的电导率,有效提高光生电子一空穴对的产生、分离和传输此外,由于氧空位的作用。使得TiO2NTs的带隙变窄。增强了可见光吸收能力,致使样品具有较高的光催化活性.并通过降解甲基橙溶液对样品的光催化活性进行评估结果显示当光照150min后,自掺杂TiO2NTs对甲基橙溶液的降解率达73%,并且这种催化剂便于回收和重复使
3、用。关键词:TiO纳米管;光催化作用;氧空位;带隙;电导率中图分类号:A文献标识码:A文章编号:1001.4861(2014)10—2308.07DOI:10.11862/CJIC.2014.321PreparationandPhotocatalyticPerformanceofSelf-DopedTiO2NanotubeArraysinLiquidEnvironmentSUNJie,SUNHeSUNWen.Yan。(TianshuiHuaTianMiroelectronecsCO.LET,Tianshui,Gansu7410
4、00China)(2TianshuiJiefangRoadNO.JElementarySchool,Tianshui,Gansu741000China)(3TianshuiNo.10MiddleSchool,Tianshui,Gansu741029China)Abstract:AfacilereductionstrategyusingN2H4·H20toyieldself-dopedTiO2nanotubearrays(NTs)isproposedinaliquidenvironmentinthiswork.Themorpho
5、logy,crystallinestructure,opticalandelectricalpropertiesoftheas-grownspecimensarecharacterizedbyusingFE—SEM,EDS,XPS,XRD,Raman,UV-Visspectroscopyandsemiconductorcharacterizationsystem(Keithley4200SCS),respectively.Theresultsshowthatalotofoxygenvacanciesareintroducedi
6、ntothebandgapoftheTi02NTsandtheoxygenvacancyleveliscreated,thusimprovingtheconductivityofthesamplesandfacilitatingphotogeneratedelectron—holeseparationandcarrierstransportundersimulatedsolarlightirradiation.Moreover,duetotheeffectofoxygenvacancies,thebandgapofspecim
7、ensisnarrowed,andvisiblelightabsorptionabilityenhanced.ComparedwithpristineTiO2NTs,theself-dopedTi02NTshavehigherphotoeatalyticactivityasevaluatedbydegradationrateofmethylorangesolution.Thedegradationrateismorethan73%after150minlightiradiation.Meanwhile,thiskindofca
8、talystiseasytorecycleandreuse.Keywords:TiO2NTs;photocatalysis;oxygenvacancy;bandgap;conductivity收稿日期:2014.04.14。收修改稿日期:2014—06—16。通讯联系人。E—
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