%0 Journal Article
%T 氧化铈纳米粒子光催化降解亚甲基蓝的动力学和机理
%J 催化学报
%P 1328-1334
%D 2010
%R 10.1016/S1872-2067(10)60121-0
%X ？CeO2nanocrystalsweresynthesizedbyasimpleprecipitationmethodandcalcinationat600°C.(NH4)2Ce(NO3)6andammoniawereusedasprecursors.TheCeO2nanoparticleswerecharacterizedbyX-raydiffraction,Fouriertransforminfraredspectroscopy,transmissionelectronmicroscopy,andN2adsorption.ThephotodegradationofmethylenebluecatalyzedbyCeO2nanoparticleswasstudiedunderUVandsunlightirradiation.Thehighestdegradationwasobtainedwith1.0g/LCeO2atpH11within125min.Thepseudofirstorderrateconstantsofdyebleachingwerecalculatedas16.2x10-3and15.7x10-3min-1underUVandsunlightirradiation,respectively.Theeffectofiso-PrOH,iodideion,andH2O2wasstudiedtopredictthepathwayofdyedegradation.Theobtainedresultsindicatetheeffectofphotogeneratedholesinthedegradationmechanismofthedye.Also,thephotocatalyticactivityofthepreparedphotocatalystwasstudiedinthepresenceofseveralnegativeions.
%K ceria
%K nanoparticle
%K photodegradation
%K methyleneblue
%K photocatalyst
%K kinetics
%U http://www.chxb.cn/CN/abstract/abstract20269.shtml