%0 Journal Article
%T 金纳米粒子在TiO2气凝胶基质上的行为:光催化活性评价和结构研究
%A Zsolt PAP
%A Andreea RADU
%A Izabella Jolan HIDI
%A Georgian MELINTE
%A Lucian DIAMANDESCU
%A Traian POPESCU
%A Lucian BAIA
%A Virginia DANCIU
%A Monica BAIA
%J 催化学报
%P 734-740
%D 2013
%R 10.1016/S1872-2067(11)60500-7
%X ？TiO2-Auaerogelscontainingdifferentamountsofgoldnanoparticlesofdifferentsizes(5and16nm)weresuccessfullysynthesizedusingasol-gelprocedure,andweretestedforsalicylicacidphotodegradationunderUVirradiation.ThestructureandmorphologyoftheobtainedmaterialswereinvestigatedusingX-raydiffraction,transmissionelectronmicroscopy,andN2adsorption-desorptionmeasurements.UV-Visspectroscopywasusedtostudytheopticalproperties.TheeffectsofthegoldnanoparticlesontheTiO2crystallizationprocessweretwofold,asfollows:(i)thenumberofcrystallizedzoneswasstronglyrelatedtotheconcentrationofthegoldnanoparticles,and(ii)thesmallergoldparticlesincreasedthetimetakenforthecrystallizationofthesamples.Itwasfoundthatthenoblemetal-dopedsamplesexhibitedhigherdegradationratescomparedwithbaretitania.Itwasfoundthatthemostactivephotocatalystineachstudiedsystemwasthesamplewiththehighestconcentrationofgoldnanoparticles.Additionally,thehighestdegradationratevaluewasobtainedwiththesmallestAunanoparticles(46.4×10-3μmol/(L·s).
%K Nanomaterial
%K Sol-gel
%K Titania
%K Salicylicacid
%K Photocatalyticperformance
%U http://www.chxb.cn/CN/abstract/abstract20964.shtml