采用炭吸附共沉淀法制备了La₂O₃/TiO₂催化剂，利用TG-DTG、XRD、TEM、UV-Vis等对催化剂进行表征，并考察了不同条件制备的La₂O₃/TiO₂对可见光催化甲基橙降解效果的影响。结果表明，炭黑的加入可有效阻止粉体在制备、干燥及焙烧过程中的团聚和烧结；在600℃煅烧后得到的粉体结晶度高、颗粒分散均匀、颗粒粒径小。在可见光照射1 h后，炭吸附沉淀法制备的La₂O₃/TiO₂对甲基橙的降解率高达92.25%，是普通沉淀法制得的La₂O₃/TiO₂的3倍，光催化活性显著提高。

La₂O₃/TiO₂ photocatalyst is prepared by carbon adsorption co-precipitation method.The samples are characterized by TG-DTG,XRD,TEM and UV-Vis.The impacts of La₂O₃/TiO₂ prepared under different conditions on the degradation of methyl orange by using visible light irradiation are studied.Results show that the addition of carbon black during the reaction can effectively prevent the agglomeration and sintering of the particles during the preparation,drying and roasting processes.The powder obtained after calcination at 600℃ has high crystallinity,uniform particle dispersion,and small particle size.Under visible light irradiation for 1 h,the degradation rate of methyl orange over La₂O₃/TiO₂ prepared by carbon adsorption co-precipitation method can reach as high as 92.25%,which is three times that over La₂O₃/TiO₂ prepared by common precipitation method,representing a significantly improved photocatalytic activity.

郝淳林(1993-),男,硕士研究生,研究方向为光催化降解,291179524@qq.com