TiO2光催化降解杀虫剂哒螨酮机理研究

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1、东南大学博士学位论文TiO<,2>光催化降解杀虫剂哒螨酮机理研究姓名：朱馨乐申请学位级别：博士专业：生物医学工程指导教师：袁春伟20041201摘要采用模型反应器进行降解哒螨酮cTAB悬浮液实验，结果表明：该装置运转良好，能够使哒螨酮完全降解。此外，研究了溶液pH值、氧化剂H202的添加量以及废水处理量等因素对光催化效率的影响，为工业化光催化降解哒螨酮打下基础。关键词：哒螨酮，Ti02光催化，反应机理，量子化学计算，顺磁共振，模型反应器ⅡAb啦anAbstractHeterogeneousphotocatalysisislhatimdiationofTi02par

2、ticlesu11derUVirradiationt11atcarriesener斟greaterthanthebaIldg印(3．2eV)血ducescon血ctionbaIldelec订onsandvalancebandhojes，whichcanmnhergenera七eV翻ousoxidizingspeciesaI】ddegradepoIlutantstoaFeatextent．Thisdissertationstudiedthereac廿叽mech锄ismofTi02photocacaMicdegradatjonofpesticidepyridabeni

3、nacetonitrne／Watersuspension．For印plyingtorcallypolIutedwaters，photocat￡dyticde目adationp州dabenmsurf如tantsuspensionwasinvest适ated．uhiI工lately，small—scaleexpements．m廿1emodelreactorwerec删edout．Tbemainworl(sandachievementsarepresentedasfollows：under九≥300muV1j曲tirradiation，in七eHnediatesidem

4、mcationandreactionroutepmpositionwereconducted曲Ti02photode芦adationofpyTidabenino曙a11ic／watersuspe工1Sion．Eightkindsofde掣础nionproducts(DPs)were1demlfledbyGC，Msanalysis，whichwerefu曲ercollflrnledbymatchingwi廿1aumenticorsynthesizedcoIrlpounds．Thepropositionofreactionpathwaysuggestedthat血ei

5、血ialdegradationofp州dabenproceedviac—sbondcleavagebet、veenphenylring姐dheterocyclicFoup，afldthenpromoteas耐ousofreac廿onssuchaSsubStitution，oxidationa11ddealkylation．Besides，onmebasisofLangmui“{tnshelwoodequation，k．meticconstam七4．3xloI，m01．L．1．min～andeouilibrimadsomtionconstantK3，1x103L．m

6、ol～werederived．Bycompa血gphotode口adationbehavjorofp蛐dabenby九兰300nmand丸三360r皿Uvirradiationindi＆remsystems，weconcludedthatnlephotodecayofp蛐dabenby丑兰300nmhTadiationwasdom协atedbyadirectphot0【ysiswhereasaphotocatal矿icnaturewascoIlfInnedby九三360姗i兀丑diationMechanistic．mVes趣撕onofphotocatal”icde

7、掣adationp河dabenⅥ忸smainlyconductedby九兰360nmirradiation．AquaHta}tiVesnJdyofdegradationproductsgeneratedduringmephotocataI”icprocesswaSperfo衄edbyGC—MSanduptofi船encompollr】dsweredetected．Theevolutionofin衄mediateswas姐alyzedsemiquantita石Velybyplomngareasofthecorrespond恤gGCpeaksasfunctionsof

8、irrad