柠檬酸法制备S_2O_8^(2-)/Fe_2O_3-TiO_2及其光催化活性的研究

Preparation of Solid Acid S_2O_8^(2-)/Fe_2O_3-TiO_2 by Citrate Acid Method and Study on Its Photocatalytic Actibity

首次用柠檬酸法制备了F_2O_3-TiO_2复合氧化物,经浸渍(NH_4)_2S_2O_8后,焙烧制得S_2O_8^(2-)/Fe_2O_3-TiO_2固体酸催化剂,测定其对水溶性染料的光催化降解活性。结果表明:在相同反应条件下,S_2O_8^(2-)/Fe_2O_3-TiO_2光催化活性比Fe_2O_3-TiO_2明显提高。当(NH_4)_2S_2O_8浸渍浓度为1mol·L^(-1)时,制得的S_2O_8^(2-)/Fe_2O_3-TiO_2酸性最强,具有超强酸性和很高的光催化活性。

Fe2O3-TiO2 were prepared by citrate acid method for the first time.After being impregnated by (NH4)2S2O8 solution and calcined at 650oC the mixed oxides formed S2082-/Fe2O3-TiO2 solid acid.The photodegradalion experiments of water - soluble dye were carried out in the suspension of S2O82-/Fe2O3- TiO2 acting as the photocalalysts.The results show that S2O82-/Fe2O3-TiO2 can greatly improve the photocatalytic activity of Ke2O3-TiO2.The S3O82-/Fe2O3-TiO2 sample strength impregnated with (NH4)2S208 solution (1mol·1-1) is of superacdity .possessing the highest acid strengty and higher pholocatalytic activity.