尖晶石型复合氧化物MAl_2O_4（M=Sr,Ba）的制备、表征及可见光催化性能研究

摘要

Spinel-type SrAl2O4、BaAl2O4 photocatalyst powders were prepared by the citric acid complex method,the structure and property of catalyst were characterized by powder X-ray diffraction and TEM techniques etc.The photocatalytic activities were investigated by the degradation of C3H22N6O6S2Na2 under artificial visible light.The results show that the photocatalytic activity of BaAl2O4 is stable and the degradation rate of C3H22N6O6S2 is over 80 % in 60 min while that of SrAl2O4 is 70 %.The difference in their photocatalytic activity is ascribed to the different electronic structures of SrAl2O4 BaAl2O4.%用柠檬酸络合法制备了尖晶石型复合氧化物SrAl2O4、BaAl2O4,用XRD、TEM等手段对催化剂结构和性能进行了表征,并考察了其在可见光下降解刚果红的催化性能。结果表明,在可见光条件下,60 min内BaAl2O4使刚果红降解率达80%以上,SrAl2O4降解率大约为70%。SrAl2O4的催化活性低于BaAl2O4可能是由于电子层结构的不同造成的。