The Influence of Morphology on Photo-catalytic Activity and Optical Properties of Nano-crystalline ZnO Powder

Nano-Micro Letters

Sara Mollaesmail¹  Javad Moghaddam¹  Saeed Karimi¹ 

关键词: Nano-particles;    ZnO;    Precipitation method;    Optical properties;    Photocatalytic activity;   

DOI  :  10.3786/nml.v4i4.p197-201

来源: Open Access House of Science and Technology

【 摘 要 】

ZnOnano-particlesweresynthesizedviaanammonicalammoniumcarbonatesolutionbyprecipitationmethodinpresenceofsomeadditivessuchasurea,oleicandstearicacid.Themorphologyandcrystallinityoftheobtainedzincoxideparticlesdependcriticallyonthetypeofadditivewhichwasused.Additivesalsoaffectedthecrystalorientationofprecipitatenano-particles.SEM,XRD,BETandUV-visiblewereusedtocharacterizemorphology,microstructure,specificsurfaceareaandopticalpropertiesoftheproducts.Photo-catalysispropertiesoftheas-preparedZnOpowderswereevaluatedbydegradationofmethylred(acidred)inaqueoussolutionexposedtoUV-light.Resultssuggestedacloserelationshipamongthemorphology,sizeandsurfaceareaonphoto-catalysisandopticalpropertiesoftheparticles.ThewidestEgvalue(3.56eV),highestdegradationanddecolorizationefficiency(99%)wereobtainedfromasamplewiththesmallestgrainsize(largestsurfacearea)whichwereusedureaasanadditive.

【 授权许可】

Unknown