不锈钢基PbO2电极电催化氧化降解甲基橙性能的研究丁徐红

2009-09-151988-。1002-1124200911-0036-04Sum170No.11ChemicalEngineer200911。COD。COD[1-3]。·OH、O3。。、。PbO2O2TiO2[4]。PbO2、、pH、。11.1(A.R.)Na2SO4A.R.。WYK-100V3AWZFUV-2100。1.21.2.1PbO280g·L-1Pb(NO3)224g·L-1Cu(NO3)20.5g·L-1NaF。100mA·cm-2α-PbO2PbO2430081)PbO225mg·L-1。、、pH、50mA/cm2Na2SO40.04mol·L-120min90%。PbO2。PbO2TQ035AStudyonelectrocatalyticoxidationdegradationofmethylorangebyPbO2electrodebasedonstainlesssteelDINGXu-hong,YANGLi-qin,ZHUCheng-ding(CollegeofResourceandEnvironmentEngineering,WuhanUniversityofScience&Technology,Wuhan430081,China)Abstract:Aself-madePbO2electrodeonstainlesssteelsubstratewasusedtodegrademethylorangethroughelec－tro-catalyticoxidationmethod.Thecurrentdensity,supportingelectrolytedosage,solutionpHandtemperaturewerein－spectedtostudywhatimpactedtheyhaveonthedecolorizationrateofmethylorange,andthebestreactionconditionsforelectro-catalyticoxidationofmethylorangeweredetermined,currentdensityis50mA·cm-2,andconcentrationofsupport－ingelectrolyteNa2SO4is0.04mol·L-1.Afterdegradationof20min,thedecolorizationratewasmorethan90%.Andseveraldifferentdyeingwastewaterweredegradedthroughelectrocatalyticoxidationmethodbytheelectrode,theresultsshowthatPbO2electrodeonstainlesssteelsubstratefordecolorizationeffectofdifferentdyeingwastewaterarerathergood.Keywords:PbO2electrodeonstainlesssteelsubstrate;electro-catalyticoxidation;methylorangeDOI:10.16247/j.cnki.23-1171/tq.2009.11.01730min50mA·cm-2β-PbO260min[5-7]。1。1.2.3、4.5.6.1Fig.1Electroplatingreactordiagram1.2.225mg·L-1PbO225mg·L-1。1.3461nm=(A0-A)/A0×100%。22.13gNa2SO4。。2。2Fig.2Effectofcurrentdensityonthedecolorizationrateofmethylorange2。。20、30、40mA·cm-2。50mA·cm-220mA·cm-260mA·cm-224min50%92.6%。。·OH、[89]。50mA·cm-2。2.250mA·cm-2Na2SO4。Na2SO43。3Fig.3Effectofsupportingelectrolyteconcentrationonthedecolorizationrateofmethylorange3Na2SO40.02mol·L-10.04mol·L-1Na2SO40.04mol·L-1。Na2SO4Na2SO4SO42-1009080706050403020100010203040/min/%i=20mA·cm-2i=30mA·cm-2i=40mA·cm-2i=50mA·cm-2i=60mA·cm-210095908580757000.020.040.060.080.100.12Na2SO4/mol·L-1/%A535426+1-VPbO220091137·OH。[1011]。0.04mol·L-1。2.3pH0.04mol·L-1Na2SO450mA·cm-2pHpH。pH4。4pHFig.4EffectofinitialpHofsolutiononthedecolorizationrateofmethylorange4pH5～7。pH620min100%。。。·OH(·OH+2H++2e-=H2OEo=+2.85V)(·OH+e-=OH-Eo=+2.02V)[12]·OH。pH。2.40.04mol·L-1Na2SO450mA·cm-2。5。5Fig.5Effectoftemperatureondecolorizationrateofmethylorange515℃。25℃。。25℃。2.5PbO2。、、3。6。6PbO2Fig.6EffectofPbO2electrodeonstainlesssteelsubstrateonthedifferentorganicwastewaterdecolorizationrate6。10min10min20min12010080604020001020304050pH=4pH=6pH=8pH=10pH=12/%/min/%100959085801015202530354045505560/℃/%120100806040200051015202530/min5838200911。1876Wiff·OH。、。3PbO2、、pH、。150mA·cm-2Na2SO40.04mol·L-1pH。2PbO220min90%。1,.J.2008256:618-623.2.J.200821A0296-97100.3,.J.200717379-82.4,.J.2004211:49-53.5,.J.20073092830-38.6Petersson,Ingela.Parametersinfluencingtheratiobetweenelectro-chemicallyformedα-andβ-PbO2J.JournalofPowerSources198876198-105.7,.、J.200827959-963.8.M.2006.9,.PbO2J.200830121-4.10.M.2007.11.J.200524252-54.12,.M.:1983.181-182.38!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!-6/183063.1%。。200913.58kgoil·t-1。41。2。。3。66～70℃,。-5～0℃。4。5。1.J.1986339-40.2.J.2006242.3.J.20051138-41.58200911