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1、挥发诱导自组装制备多孔Li4SiO4材料JournalofAdvancesinPhysicalChemistry物理化学进展,2016,5(2),39-47PublishedOnlineMay2016inHans.AnEvaporationInducedSelf-AssemblyMethodtoPorousLi4SiO4MaterialsXueqinHuang,JimeiHan,QiangXiao,YijunZhong,WeidongZhuKeyLaboratoryoftheMinistryofEduca
2、tionforAdvancedCatalysisMaterials,InstituteofPhysicalChemistry,ZhejiangNormalUniversity,JinhuaZhejiangthththReceived:Apr.20,2016;accepted:May10,2016;published:May13,2016Copyright?2016byauthorsandHansPublishersInc.ThisworkislicensedundertheCreativeCommonsA
3、ttributionInternationalLicense(CCBY).AbstractAsolventevaporationinducedself-assembly(EISA)methodfollowedbycalcinationwasemployedtoprepareporousLi4SiO4materialsbyusingLiOH·H2O,TEOS,deionizedwater,andCTAB+PAAaslithiumsource,siliconsource,solvent,andcomposit
4、etemplate,respectively.X-raypowderdif-fraction(XRD)andscanningelectronmicroscope(SEM)wereappliedtocharacterizethestructureand———————————————————————————————————————————————morphologyoftheas-preparedLi4SiO4materials.TheporestructuresoftheLi4SiO4materialswe
5、reinvestigatedbytheN2adsorption-desorptionanalysis.CO2uptakesandrecyclestabilityofthepreparedLi4SiO4materialswereinvestigatedonathermogravity(TG)analyzer.ThesamplesynthesizedbytheEISAmethodat60?CdisplaysCO2uptakesupto22.5wt%within5min.Addi-tionally,anabso
6、rptionequilibriumof28.8wt%canbeavailablewithin10minat550?CandaCO2partialpressureof0.25bar.Afterfiveabsorption-desorptioncycles,theLi4SiO4materialkeepsitsoriginalCO2absorptionproperties,indicatingagoodcyclestability.KeywordsLi4SiO4,Template,Self-Assembly,C
7、O2Absorption黄雪芹，韩继梅，肖强，钟依均，朱伟东浙江师范大学物理化学研究所，先进催化材料省部共建教育部重点实验室，浙江金华黄雪芹等收稿日期：2016年4月20日；录用日期：2016年5月10日；发布日期：2016年5月13日摘要本文以氢氧化锂(LiOH·H2O)为锂源、正硅酸乙酯(TEOS)为硅源、去离子水为溶剂、十六烷基三甲基溴化氨(CTAB)+聚丙烯酸(PAA)为复合模板剂，采用挥发诱导自组装法(EISA)经高温焙烧制备多孔Li4SiO4材料。利用X射线粉末衍射(XRD)和扫描电子显微镜(
8、SEM)———————————————————————————————————————————————对材料的结构特征与表面形貌进行表征，用N2-吸脱附考察材料的孔结构，在热重分析仪(TG)上研究Li4SiO4材料高温下的CO2吸收性能和循环稳定性。实验结果表明，以CTAB+PAA为复合模板剂，60℃溶剂挥发诱导自组装制备的Li4SiO4材料在550℃、0.25bar下5min内吸收量可达22.5wt%，且在10min内达到吸
