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《TiO2-ZrO2的制备及其微波增强光催化降解甲基橙.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、物理化学学报(WuliHuaxueXuebao)MayActaPhys.一Chim.Sin.,2010,26(5):1323—13291323[Article]www.whxb.pku.edu.cn纳米复合材料Ag/TiO2-ZrO2的制备及其微波增强光催化降解甲基橙李莉陆丹计远赵月红(齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006)摘要:采用EOP()0(P123)作模板剂,通过溶胶一凝胶一程序升温溶剂热一步法,并经萃取处理制备了具有光催化活性的纳米复合材料Ag/TiO一ZrO。.用x射线衍射(XRD)、X射线光电子能谱(XPS)、透射电子显微镜(TEM)、N2吸附一脱附测定和扫
2、描电子显微镜配合X射线能量色谱仪(SEM—EDS)等测试手段对其组成、结构及形貌等进行了表征.结果表明,复合材料Ag/TiO一ZrO中Ag以单质形式存在,材料具有双孔结构,颗粒分布较均匀,结构也较规整,平均孔径约为3.6和9.0am.通过微波增强光催化降解染料甲基橙的实验,对复合材料ATiO一ZrO的光催化活性进行了探究.实验结果表明,微波辅助光催化效果优于紫外辐射,并且萃取后的合成产物Ag厂riO2-ZrO在90min内对甲基橙的降解率可达81.5%,其潘l生高于市售P25以及TiO一ZrO关键词:溶胶一凝胶;Ag/TiOrZrO;光催化;微波;甲基橙中图分类号:0643Preparatio
3、nofNanocompositeAg/TiOz-ZrOzandtheMicrowaveEnhancedPh0tOcatalyticDegradationofMethylOrangeLILiLUDanJIYuanZHAOYue—Hong(FacultyofChemistryandChemicalEngineering,QiqiharUniversity,Qiqihar161006,Heilong~iangProvince,P.R.China)Abstract:ThenanocompositeAg/WiO2一ZrO2possessinghighphotocatalyticactivitywaspr
4、eparedbythesol—gelmethodcombinedwithtemperature—programmedtreatmentinthepresenceofthetriblockcopolymetsurfactantEO~PO70EO∞(P123)followedbyextraction.Thephasecomposition,structuresandmorphologiesofthenanocompositeAg/TiOZrO2werewell—characterizedbyX—raydifraction(XRD),X—rayphotoelectronspectroscopy(XP
5、S),transmissionelectronmicroscopy(TEM),N2adsorption—desorptiontestsandscanningelectronmicroscopyassistedX—rayenergydispersivespectroscopy(SEM—EDS).ResultsshowedthatthesilverspeciesinthenanocompositeAg/TiO2一ZrO2wasmetallicAg。.Moreover,thecompositehadbimodalporesystems,anorderlydistributionofparticles
6、andgoodstructure.Theaverageporediameterwasca3.6and9.0nm.ThemicrowaveassistedphotocatalyticdegradationofmethylorangeonAg厂rio2一ZrO2inanaqueoussolutionwascarriedouttoinvestigatethecatalyticactivity.Afterextraction,thephotocatalyticactivityundermicrowaveirradiationwasfoundtobemoreeficientthanthatunderUV
7、irradiationandmethylorangedegradedby81.5%within90min.ThisdegradationbehaviorwasbetterthanthatofDegussaP25andTiO2一ZrO2.KeyWords:Sol—gel;Ag/TiO2_ZrO2;Photocatalysis;Microwave;Methylorange半导体多相光催化在废水处理及卫
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