曙红,叶绿素铜三钠共敏化TiO2纳米颗粒的光催化性能.pdf

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1、·46·材料导报B：研究篇2014年1月(下)第28卷第1期曙红，叶绿素铜三钠共敏化TiO2纳米颗粒的光催化性能杜雪岩，王峭，续京。，王想红(1兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室，兰州730050；2北方民族大学国家民委化工技术基础重点开放实验室，银川750021)摘要采用曙红与叶绿素铜三钠对Ti02纳米颗粒进行了光敏化，研究了TiOz纳米颗粒在节能灯光源下的光催化活性。通过XRD、TEM和UV-Vis等手段对Ti02纳米颗粒的物相、粒径、形貌及光学性能进行了表征分析。结果表明：光敏

2、化可以保持Ti02原来的锐钛矿相，对其形貌亦影响甚少；光敏化后的TiO2纳米颗粒在可见光区吸光程度有较大提高，两种光敏剂以协同作用使光谱响应波长向可见光方向移动，拓展了Ti02光谱响应范围。光催化降解实验表明：光敏剂共敏化Ti02纳米颗粒有很好的光催化性能，且敏化温度3O℃，敏化时间8h，曙红质量浓度3Omg／L及叶绿素铜三钠质量浓度20mg／L时，光敏化的Ti02纳米颗粒光催化效果最好，节能灯光源下对甲基橙的降解率为61．33％。关键词Ti02纳米颗粒共敏化光催化中图分类号；TB34；TB332文献标

3、识码：AStudyonthePhotocatalyticPerformanceofEosinandChl0r0phyllinSensitizedTiO2NanoparticlesDUXueyan，WANGQiao，XUJing，WANGXianghong(1StateKeyLaboratoryofGansuAdvancedNon-FerrousMetalMaterials，LanzhouUniversityofTechnology，Lanzhou730050；2StateKeyLaboratoryofC

4、hemicalTechnologyFoundation，BeifangUniversityofNationality，Yinchuan750021)AbstractTi02nanoparticleswerepreparedbysol—gelmethod，thentheysensitizedwitheosinandchlorophyl—linafterheattreatmentin400℃。anditsphotocatalyticactivitywasstudiedwithphotocatalyticox

5、idationinenergy-savinglamplight．TheTi02nanoparticleswerecharacterizedbyXRD，TEMandUV—vis．TheeffectsofsensitizationTi02nanoparticlesonthecystalphase．crystallitesizes，surfacetopographyandopticalpropertyofthecatalystswereinvestigated．Theresultsexhibitthatsen

6、sitizationcanmaintaintheanataseofTi02，alsolittleinfluenceonitsmor—phology；sensitizedTi02nanoparticlespossessesstrongabsorptioninvisibleregion．fortheco-operationeffectofele—mentsco-sensitizedwithtwokindsofDh0tosensitizers，causethespectralresponsetodirecti

7、onofvisibleIight，thespectra1responserangeTi02hasbeenexpanded．Theresultsshowthat：theperformanceofTi02nanoparticlesforphotocatalyticdegradationrate(PDR)ofmethylorangehasbeenimprovedobviouslyfordropingandsensitizing．ThePDRofmethylorangereached61．33underthec

8、onditionsofeosinconcentrationof30mg／L，chlorophyllinconcen-trationof20mg／L，sensitizationtimeof8handsensitizationtemperatureof30℃．KeywordsTiOznanoparticles，synergisticsensitization，photocatalysis(锐钛矿)或413nm(金红石)的光才可激发它，所以对其进