The Redox Kinetics of the Oxidation for CO on EuFeO_3 Catalyst

EuFeO_3 was prepared by the complexation method of citric acid. The Perovskite phase of EuFeO_3 was determined by XRD. The redox mechanism for oxidation of CO on EuFeO_3 was proven by the pulse method of reduction with CO and reoxidation with O_2. The redox kinetics of oxidation for CO on EuFeO_3 has been investigated with the external circulation flow reactor. The experimental data obeyed the redox equation. The parameters of the kinetic equation were estimated by the method of orthogonal design.

炭吸附共沉淀法制备EuFeO_(3)纳米粉体及其光催化性能研究

采用炭吸附共沉淀方法制取了EuFeO_(3)纳米半导体。利用差热-热重分析(TG-DTA)、X-射线衍射(XRD)、紫外-可见漫反射光谱分析(UV-Vis)等技术对粉体进行表征。将制得的EuFeO_(3)降解甲基橙溶液,并通过降解效果评价其光催化性能。结果表明,制得的EuFeO_(3)粉体平均粒径小、分散均匀、结晶度高;活性炭的加入可以抑制团聚和烧结;在催化反应进行1 h后,体系中甲基橙的降解率达到88.63%,相较于普通沉淀法制备的EuFeO_(3)的光催化性能得到提高。