Hollow-Form LaNiO3 Perovskite Catalyst for PM Combustion Using Carbon Fibers as a Template

The effective utilization of carbon fibers recovered during the thermal decomposition recycling of carbon-fiber-rein-forced plastic (CFRP) was investigated. Carbon fibers have a uniform diameter and a suitable size for the use as a combustion catalyst for particulate matter (PM). Thus, in this study, carbon fibers were used as a template to synthesize hollow- form LaNiO3 perovskite-type oxide via the precursor accumulation method. The calcination temperature was lowered by the internal heat supply from the combustion of the carbon template. Hollow-form LaNiO3 exhibited the same chemical properties as LaNiO3 prepared via the common sol-gel method. The morphology of the hollow form decreased the bulk density of the catalyst, resulting in enhanced contact with PM and, consequently, high PM combustion efficiency.