Fabrication of nanofibrous A- or B-sites substituted LaCoO3 perovskites with macroscopic structures and their catalytic applications

Fabrication of nanofibrous La1−xCexCoO3 (x = 0.05, 0.1, 0.2) and LaMnxCo1−xO3 (x = 0.2, 0.5, 0.8) perovskite-type oxides with macroscopic structures can be successfully achieved by using carbon nanofibers (CNFs) as templates. Field emission scanning electron microscopy (FE-SEM), coupled with X-ray diffraction (XRD) analysis confirmed the template effect and formation of the perovskite-type oxides on the macroscopic substrate. It turned out that this facile method can ensure the desired single-phase perovskite-type oxides formation by controlling the corresponding metal ratio during the preparation procedure. In addition, the immobilized nanofibrous La1−xCexCoO3 (x = 0.05) and LaMnxCo1−xO3 (x = 0.5) perovskite-type oxides can greatly decrease the combustion temperature of nanosized carbon black particles, which has the high potential application prospects in the treatment of diesel soot particles.