Cu-Fe水滑石及其衍生物的制備和催化性能研究.pdf

1、合肥工業(yè)大學(xué)碩士學(xué)位論文CuFe水滑石及其衍生物的制備和催化性能研究姓名：左鵬申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：化學(xué)工藝指導(dǎo)教師：于少明20080501Preparationandcatalyticpropertiesofcopper／ironcontaininglayereddoublehydroxidesandtheir1●●nerlVativesAbstractLayereddoublehydroxides(LDHs)andtheirder

2、ivatives，mixedoxidesbycalciningLDHs，areoneofimportantpotentialmaterialsinthecatalysisandadsorptionfieldsInthethesis，Cu—NiA1LDHs，Cu—MgA1LDHs，F(xiàn)e—Ni—A1LDHsandFeMg—AILDHswerepreparedbycoprecipitation，fromthecorrespondingnitr

3、atesolutionsandmixedprecipitants(NaOHandNa2C03)MixedoxideswereobtainedbycalciningLDHsatdifferenttemperaturesThecatalyticbehavioursoftheaforementionedLDHsandtheirderivativesforthecatalyticwethydrogenperoxideoxidation(CWPO

4、)ofphenolaqueoussolutionsweretestedUnderthesameexperimentalconditions，itwasobservedthatironcatalystsshowedbadactivities(10％ofphenolconversion)，andthecoppercatalysts，especiallyCuNiA1mixedoxide，showedhigheractivitiesItwass

5、aidthatafewofirondopingintothecoppercatalystcouldimprovethedispersaloftheactiveelement(Cu)Sothequaternarymixedoxidewasprepared，containingcopper，nickel，ironandaluminumAccordingtotheconversionofphenol，theratiosoffourelemen

6、tsinthecatalystwereascertained：EM2／ZM3=3，F(xiàn)e3／ZM3=O25，Cu2／ZM2=O25Weperformedthermogravimetricanalysis，X—raydiffractionandFTolRspectroscopytocharacterizetheCuNiFeA1LDHsandthechemicalchangeswhichtakeplaceduringthecalciningp

7、rocessByaseriesofexperiments，theoptimumparametersintheCWPOprocess，usingCu—Ni—Fe—A1mixedoxideascatalyst，wereascertainedWheninitialphenolconcentrationwas400mg。L～，optimumconditionsrequiredfor975％phenolconversionwereasfollow

8、s：catalystconcentrationwas400mg‘L～，MH202／MphenoI(molarratio)wasequalto12，reactiontimewas60min，reactiontemperaturewas60CandtheinitialpHvaluewasnotadjusted(65)Thecatalystalsoshowedgoodactivitiesafterreusing4times，andthecon

9、versionofphenolwas935％Wealsoperformedhighperformanceliquidchromatography(HPLC)toanalyzetheproductsofphenoldegradationatdifferentreactiontimeinthepaperTheanalyticalresultsindicatedthathydroquinone，catechol，maleicacidandot