以TiOSO4为原料水热合成纳米TiO2及其光催化性能研究.pdf

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1、中文摘要本论文首先以工业级TiOS04为原料，尿素为沉淀剂，利用微波水热法一步合成纳米Ti02催化剂。通过对TiOS04预处理过程、沉淀剂的加入方式和加入量、微波水热条件，沉淀处理方式及煅烧温度多个方面进行优化，最终确定一条简单高效的工艺路线。在上述工艺的基础上，为了进一步提高纳米Ti02的催化活性，分别以PAA和PAM为表面修饰剂，对纳米Ti02进行表面改性。通过探讨表面修饰剂的加入顺序、添加量及相应的微波水热条件对产品催化活性的影响，确定最佳的工艺条件。从环境保护、设备要求及催化活性等多个角度对PAA

2、／Ti02和PAM／Ti02进行对比研究，结果表明，PAM／Ti02催化剂更适合工业化生产。最后，利用IR、TG、BET、XPS、TEM等分析手段对纯Ti02和PAM／Ti02的结构和形貌进行表征，探讨后者活性提高的原因。结果表明，PAM的表面修饰使得PAM／Ti02比纯Ti02的光生载流子分离效率更高，粒径更小，比表面积更大，分散性更好，而这些因素均有助于改善光催化活性。关键词：二氧化钛；微波水热；工艺流程优化；聚合物修饰：光催化AbstractNano-Ti02catalystM㈣synthesize

3、Athroughone-potmicmwave-hydrothermalmethodwithindustrialgradeTiOS04astheiawmaterialand111"o[I,asthoprecipitatingagentinthispaper,TiOS04pretreatmentprocess，theaddingmethodandamotmtoftheprecipitatingagent，microwave-hydrothermalconditions，precipitationapproa

4、chandcalcinationtemperaturewereoptimizedrespectively,andasimpleandefficientprocessroutewasdefined．Onthebasisoftheprocessmentionedabovc．nan∞Ti02wassurface-modifiedusingPAAandPAMasthesRrfac≈modifierrespectivelytofurtherenhancethecatalyticactivityofnano-Ti02

5、．Effectoftheaddingorderandlmaolmtofthesurfacemodifierandthecorrespondingmicrowave-．hydrothermalconditionsOnthecatalyticactivityoftheproductwasexploredtodeterminetheoptimalprocessconditions．PAAfri02andPAM／TiOzwerecomparativelystudiedintermsofenvironmentalp

6、rotection，catalyticaetivityandSOon，whichshowedthatPAMn'i0_2wasmoresmmbMforindustrialproduction．Finally,thestructureandmorphologyofthepareTi02andPAMJTi02wegecharacterizedviatheanalyticaltoolsof吣TGBET,XPS，TEMandSOontoexplorethel'eBsoRsforthecatalyticaotivi毋

7、improvementofthelatter．TheresultshowedthatthesurfaoemodificationwithPAMmadePAM厂n02hashigherseparativeefficiencyofphoto-generatedcarrier,smallerparticlesize，biggerspecificgirt'faceat'caandbetterdispersionthanthepure髓02，andallthesefactorshelpedtoimprovethep

8、hotocatalyticaztivity．Keywords：titaniumdioxide；microwavehydrothcrmal；processoptimization；polymermodification；photocatalysis．II-目录目录中文摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯IAbstract⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．⋯⋯⋯⋯⋯⋯⋯．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．⋯⋯