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1、物理化學(xué)學(xué)報(WuliHuaxueXuebao)1330ActaPhys．-Chim．Sin．，2010，26(5)：1330—1336May[Article]www．whxb．pku．edu．cn高分散Ti02／SBA．15的制備及光催化性能張書翠1,2姜東1I唐濤1,2李君華1,2徐耀(中國科學(xué)院山西煤炭化學(xué)研究所，煤轉(zhuǎn)化國家重點實驗室，太原030001；中國科學(xué)院研究生院，北京100049)摘要：提出了一種制備高分散TiOJSBA一15光催化劑的新方法．以鈦酸四正丁酯(TB)和羧基改性的SBA一15(COOH／SBA一15)為原料，利用COOH／SBA
2、一15表面上高分散的羧基與TB的配合作用將TB錨定，經(jīng)過溶劑熱及焙燒處理制得TiOJSBA一15光催化劑．采用粉末x射線衍射(XRD)，N吸脫附，傅里葉變換紅外光譜(FT—IR)，透射電鏡(TEM)等對所得催化劑進行了表征．結(jié)果表明：所得TiOz／SBA一15光催化劑為高結(jié)晶度的銳鈦礦晶型，TiO均勻地分散在SBA一15表面，TiOJSBA一15光催化劑保持較好的介孔特征結(jié)構(gòu)，具有較大比表面積．以降解羅丹明B(RhB)為探針反應(yīng)，考察了所得TiOJSBA一15光催化劑的光催化性能．與后處理浸漬法制備的光催化劑相比，本文制備的TiOJSBA一15光催化劑表現(xiàn)出
3、了更加優(yōu)越的光催化性能．關(guān)鍵詞：光催化；羧基改性；TiO；SBA一】5；溶劑熱中圖分類號：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，F(xiàn)ouriertransforminfrared(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
