【摘要】 用柠檬酸法制备了碱土金属钙钛矿和二氧化钛复合氧化物,X射线衍射和电子显微镜等技术分析了样品的晶相组成、含量以及粒径等。以紫外杀菌灯为光源,甲基橙水溶液为被降解物,对所制备的系列复合氧化物进行了光催化活性评价。实验结果表明:在相同条件下,最佳配比的复合氧化物的光催化活性顺序为:钙复合氧化物>钡复合氧化物>锶复合氧化物>镁复合氧化物。以n(Ca)∶n(Ti)=3∶7配比制得的复合氧化物具有最好的光催化活性,分析结果表明,在500℃下焙烧4h后,其复合物粒径约10.2nm,光照3h,对甲基橙的降解率达90%。更多还原

【Abstract】 The alkaline earth perovskite type and titanic oxide complex oxide were prepared by the citrate methods.Their structures,size and morphologies were characterized by the analytical technology of XRD and SEM.The photocatalytic properties of a series of samples were assessed in UV-bactericidal lamp by measuring the photodegration of the Mcthyl orange in aqueous solution.The results of the experiments show that photocatalytic activity of the optimal proportion samples were Ca complex oxide>Ba complex oxide>Sr complex oxide>Mg complex oxide.The photocatalyst of n_Ca∶n_Ti=3∶7 is best active for the degradation of Mothyl orange solution,after calcination 4h under 500℃,the products diameter is about 10.2nm and the photodegration rate of the Mothyl orange is 90% under irradiation of 3h.更多还原