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《氮掺杂对TiO2催化剂吸附性能及光催化性能的影响.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、2015年4月工业催化April2015第23卷第4期INDUSTRIALCATALYSISVol.23No.4催化剂制备与研究氮掺杂对TiO催化剂吸附性能及光催化性能的影响2*陈蓉,张守臣,王丽娟(大连理工大学化工学院,辽宁大连116023)摘要:以低浓度碱溶剂热法制备钛酸纳米纤维,利用二次水热法掺杂氮元素制得N-TiO催化2剂;采用X射线衍射和扫描电子显微镜对制备的催化剂进行表征。以亚甲基蓝溶液模拟有机废水,考察氮掺杂量对催化剂吸附性能和光催化性能的影响,揭示吸附性和光催化性能的内在联系。结果表明,掺杂氮元素未改变TiO的晶型,但能改变TiO晶体尺寸,对其形貌有一定影响,同
2、时显22著提高N-TiO催化剂的吸附性能和催化活性。氮掺杂量越高,晶粒尺寸越小,比表面积越大,吸2附和光催化性能越好。在n(N)﹕n(Ti)=1﹕1时,TiO光催化活性和吸附性能最佳。2关键词:催化化学;氮掺杂;光催化;溶剂热法;吸附性能;亚甲基蓝doi:10.3969/j.issn.1008-1143.2015.04.009中图分类号:TQ426.6;TQ034文献标识码:A文章编号:1008-1143(2015)04-0297-04InfluenceofN-dopingonadsorptionandphotocatalyticdegradationperformanceof
3、TiOcatalysts2*ChenRong,ZhangShouchen,WangLijuan(DepartmentofChemicalEngineering,DalianUniversityofTechnology,Dalian116023,Liaoning,China)Abstract:Thetitanatenanofiberswaspreparedbysolvothermalmethodwithlowconcentrationofalkali,andthenN-dopedTiOcatalystswerepreparedbytwicehydrothermalmethod.T
4、heas-preparedcatalysts2werecharacterizedbyX-raydiffractionandscanningelectronmicroscope.Usingmethylenebluesolutionasthesimulatedorganicwastewater,theinfluenceofNdopingamountsontheadsorptionandcatalyticperformanceofthecatalystswasinvestigated,andtheinherentconnectionofadsorptionandphotocataly
5、ticpropertieswasrevealed.TheresultsshowedthatdopingnitrogencouldchangethecrystalsizeandmorphologyofTiO2,butcouldnotchangeitscrystalstructure.Furthermore,theadsorptionandcatalyticactivityofN-dopedTiO2catalystswereimprovedobviously.ThehighertheamountsofNdoping,thesmallerthegrainsize,thebiggert
6、hespecificsurfaceareaandthebettertheperformanceofadsorptionandphotocatalysis.Undertheconditionofn(N)﹕n(Ti)=1﹕1,TiO2photocatalystpossessedtheoptimalperformanceofadsorptionandphotocatalysis.Keywords:catalyticchemistry;Ndoping;photocatalysis;solvothermalmethod;adsorptionperformance;methyleneblu
7、edoi:10.3969/j.issn.1008-1143.2015.04.009CLCnumber:TQ426.6;TQ034Documentcode:AArticleID:1008-1143(2015)04-0297-04[1]TiO2以价廉易得、催化活性高和不产生二次污染等优点在光催化领域具有无可替代的作用。收稿日期:2015-01-06;修回日期:2015-03-18作者简介:陈蓉,1989年生,女,湖北省荆州市人,在读硕士研究生,研究方向为二氧化钛光催化。通讯联系人:张守臣,副教授
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