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1、物理化学学报(WuliHuaxueXuebao)JanuaryActaPhys.-Chim.Sin.,2010,26(1)：79-8679[Article]www.whxb.pku.edu.cn溶胶-凝胶和浸渍-水热制备方法对TiO2/AC光催化剂结构和性能的影响11,21,*111徐鑫王晓静胡中华刘亚菲王晨晨赵国华(1同济大学化学系,上海200092;2河北科技大学理学院,石家庄500018)摘要：分别采用溶胶-凝胶法和浸渍-水热法制得负载于活性炭(AC)的TiO2催化剂,并用扫描电镜(SEM)、X射线衍射(XRD)、
2、拉曼光谱和氮气吸附等方法对催化剂进行了表征.结果表明:溶胶-凝胶法制得的TiO2以不规则碎片形式涂附在载体表面,而浸渍-水热法制得的球形TiO2颗粒呈柱形生长均匀覆盖在载体表面;不同温度处理的浸渍-水热法制得的TiO2/AC光催化剂的中孔和微孔比表面积均大于溶胶-凝胶法制得的样品,负载的TiO2粒径则小于溶胶-凝胶法制得的样品.对甲基橙(MO)溶液的光催化降解测试结果表明,600℃煅烧为两种方法的最佳热处理温度,浸渍-水热法制得的催化剂光催化效果明显强于溶胶-凝胶法的.关键词：TiO2;光催化;活性炭载体;溶胶凝胶法;浸
3、渍-水热法中图分类号：O641;O433InfluenceofSol-GelandDip-HydrothermalPreparationMethodsonStructureandPerformanceofTiO2/ACPhotocatalysts11,21,*1XUXinWANGXiao-JingHUZhong-HuaLIUYa-Fei11WANGChen-ChenZHAOGuo-Hua(1DepartmentofChemistry,TongjiUniversity,Shanghai200092,P.R.China;2S
4、choolofSciences,HebeiUniversityofScienceandTechnology,Shijiazhuang500018,P.R.China)Abstract：TiO2catalystsdepositedonactivatedcarbon(TiO2/AC)werepreparedbysol-gelanddip-hydrothermalmethodstoinvestigatetheeffectofpreparationmethodsonthestructureandcatalyticperforma
5、nceofTiO2/ACcatalysts.Thesampleswerecharacterizedbyscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),Ramanspectroscopy,andnitrogenadsorption.ResultsshowthattheTiO2producedbythesol-gelmethodconsistsofirregularfragmentscoatedontothecarbonsurfaceandthatthedip-hy
6、drothermalmethodleadstonanorodsbeingdepositedontotheACsurface.ThemesoporousandmicroporousspecificsurfaceareasoftheTiO2/ACsamplespreparedbythedip-hydrothermalmethodwerelargerthanthoseofthesol-gelsamples,andthediametersoftheTiO2particlespreparedbytheformermethodwer
7、esmaller.TheperformanceoftheTiO2/ACcompositephotocatalystswasevaluatedbythedegradationofmethylorange(MO).Wefoundthat600℃wastheoptimaltemperatureforthecalcinationofTiO2.Furthermore,thephotocatalyticactivitiesofTiO2/ACsamplespreparedbythedip-hydrothermalmethodwereo
8、bviouslybetterthanthosepreparedbythesol-gelmethod.KeyWords：TiO2;Photocatalysis;Activatedcarbonsupport;Sol-gelmethod;Dip-hydrothermalmethod光催化氧化法是一种高效、节能的水处理高级氧
