SBA-15的制备及光催化性能.pdf

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1、物理化学学报(WuliHuaxueXuebao)1330ActaPhys．-Chim．Sin．，2010，26(5)：1330—1336May[Article]www．whxb．pku．edu．cn高分散Ti02／SBA．15的制备及光催化性能张书翠1,2姜东1I唐涛1,2李君华1,2徐耀(中国科学院山西煤炭化学研究所，煤转化国家重点实验室，太原030001；中国科学院研究生院，北京100049)摘要：提出了一种制备高分散TiOJSBA一15光催化剂的新方法．以钛酸四正丁酯(TB)和羧基改性的SBA一15(COOH／SBA一15)为原料，利用COOH／SBA

2、一15表面上高分散的羧基与TB的配合作用将TB锚定，经过溶剂热及焙烧处理制得TiOJSBA一15光催化剂．采用粉末x射线衍射(XRD)，N吸脱附，傅里叶变换红外光谱(FT—IR)，透射电镜(TEM)等对所得催化剂进行了表征．结果表明：所得TiOz／SBA一15光催化剂为高结晶度的锐钛矿晶型，TiO均匀地分散在SBA一15表面，TiOJSBA一15光催化剂保持较好的介孔特征结构，具有较大比表面积．以降解罗丹明B(RhB)为探针反应，考察了所得TiOJSBA一15光催化剂的光催化性能．与后处理浸渍法制备的光催化剂相比，本文制备的TiOJSBA一15光催化剂表现出

3、了更加优越的光催化性能．关键词：光催化；羧基改性；TiO；SBA一】5；溶剂热中图分类号：0643SynthesisandPh0t0catalyticActivityofHighlyDispersedTiOz／SBA-15ZHANGShu—Cui。JIANGDong'TANGTao，LIJun—Hua，XUYao’(StateKeyLaboratoryofCoalConversion，InstituteofCoalChemistry，ChineseAcademyofSciences,Ta~uan030001，尸．R．China；GraduateUnivers

4、ityofChineseAcademyofSciences,BeUing100049,P．R．China)Abstract：HighlydispersedTiOJSBA一15photocatalystsweresuccessfullysynthesizedbysolvothermaltreatmentusingtitaniumn—butoxide(TB)andcarboxylate—modifiedSBA一15(COOH／SBA一15)asrawmaterials．ThegooddispersivecarboxylgroupsofCOOH／SBA一15coo

5、rdinatedwithTBmoleculestoanchorthem．Aftersolvothermaltreatment，theTBmoleculesweretransformedintoTiO2nanoparticlesandfinallyformedtheTiOJSBA一15products．TheproductswerecalcinedtoimprovethecrystallizationofTiO2andtoremovetheorganiccompounds．As—obtainedTiOJSBA一15photocatalystswerechara

6、cterizedbyX—raydiffraction(XRD)，nilrogenadsorption，Fouriertransforminfrared(FI—IR)spectroscopy，andtransmissionelectronmicroscopy(TEM)．Analyticalresultsshowedthattheas—obtainedTiOJSBA一15photocatalystspossessedabettermesoporousstructureandalargerspecificsurfacearea．ThehighlycrystaHin

7、eanataseTiO2nanocrystalsdispersedwellonthesurfaceofSBA一15．RhodamineB(RhB)，asaphotodegradationtarget，wasusedtoevaluatephotocatalyticperformanceunderUVlightirradiation．Theas—obtainedTiOJSBA一15photocatalystsexhibitedmuchbetterphotocatalyticactivitycomparedwiththephotocatalystsprepared

8、byapost—synthesisimpregnat