納米ZnO和Fe-ZnO的合成及光催化降解性能的研究.pdf

1、華中師范大學碩士學位論文納米ZnO和FeZnO的合成及光催化降解性能的研究姓名：劉英申請學位級別：碩士專業(yè)：有機化學指導教師：梁英劉慧宏20090501AbstractRecentlyenvironmentalproblemssuchasairandwaterpollutionhaveprovidedtheimpetusforsustainedfundamentalandappliedresearchintheareaofenviron

2、mentalremediationAmongthenumerousphysicalandchemicalmethods，photodegradafionoforganiccompoundsbysemiconductorphotocatalysts，whichisaneconomicandecologicallysafeoptionforsolvingpollutionproblemshasattractedintenseresearch

3、interestsincephotoelectrochemicalwatersplittingWasreportedThewidebandgapsemiconductormetaloxide(SMO)，suchasZnO，whichhasalargedirectbandgap(337eV)，excellentchemicalandthermalstabilityandtheelectricalpropertiesofIIVIsemico

4、nductorpossessinglargeexcitationbindingenergy(60meV)atroomtemperature，hasbeenwidelyusedasphotocatalystsforitshighphotosensitivityenvironmentalsustainabilityandlargebandgapSynthesis，characterizationofNano—ZnOandFe／ZnOwere

5、reporortedinthispaperSomemeaningfulresultswereobtainedInthispaperthefluffyporousstructureZnOnanocrystalshavebeensuccessfullysynthesizedusingcitricacidassistedsol—gelmethodTheZnOnanocrystalsweresystematicallycharacterized

6、byX—raydiffraction(XRD)，fieldemissionscanningelectronmicroscopy(FE—SEM)，diffusereflectanceUVvisspectroscopyMoreoverthethermaldecompositionofzinccitratechelatecompoundprecursorWasfurtherstudiedbyTermogarvimety／Differentia

7、lScanningCalorimeteranalyzerfrG／nSC)Finally，theZnOnanocrystalswereinvestigatedinthephotodegradationexperimentitsphotocatalyticactivityWasstudiedinthedegradationofmethyleneblue(MB)dyeatambienttemperature，theresultsindicat

8、edthatthehighlyphotocatalyticactivityWasexhibitedusingZnOnanocrystalsasphotocatalystThefluffyporousstructureZnOarchitecturesmightbefoundtohavepotentialapplicationsinmanyotherfieldssuchas：chemicalsensorsolarcells，optoelec

9、tronicdevices，eteNextwereportusingZn(Aeh‘2H20，F(xiàn)e0N03)3’9H20andNaOHaslawmaterials，andFe—dopedZnOispreparedbyhydrothermalmethodThestructuralandmorphologywereinvestigatedbymeansofXlaydiffractionandScanelectionmicroscopyThem

10、easurementsindicatethattheFe—dopedZnOisrodTheUVdiffusereflectanceabsorbentpropertiesaredetectedbyUVLambda35spectrophotometerTheresultsshowthattheFedopedZnOhasstrongabsorptionatultralandvisibleregionPhotodegradationofdyes