Fabrication of super basic BaxMg(1-x)Fe2O4 magnetic spinel nanocatalyst toward biodiesel production

•Successfully synthesis BaO/BaxMg1-xFe2O4 by the impregnation/solution combustion method.•Confirmation the effect of Ba adding on physicochemical properties of BaxMg1-xFe2O4.•Improved catalytic properties for green fuel production in the BaO/Ba0.2Mg0.8Fe2O4 sample.•Confirmation of high conversion and reusability of Magnetic BaO/Ba0.2Mg0.8Fe2O4 in green fuel production. Magnetic BaxMg1-xFe2O4 (x = 0, 0.1, 0.2 and 0.3) supports were successfully fabricated by the solution combustion synthesis method. Then, the synthesized supports were impregnated with barium oxide to achieve basic nanocatalysts to produce biodiesel from sunflower oil. Various physicochemical analyses such as XRD, FESEM, EDX, TEM, BET-BJH, VSM, FTIR, TPD-CO2, and TG were carried out to characterize the synthesized nanocatalysts. The characteristic results demonstrated that the addition of Ba to magnesium ferrite support slightly increases the crystallinity and decreases the particle size. So, the best physicochemical properties are related to the BaO/Ba0.2Mg0.8Fe2O4 sample, which led to better catalytic activity that 97.5% conversion was achieved. The reusability of prepared nanocatalysts was also examined that slight deviation after 6 experiments was detected. The main purpose of this research is a production of green fuel for protecting the environment through investigating a series of super basic nanocatalysts for biodiesel production. So the Magnetic BaO/BaxMg1-xFe2O4 (x = 0, 0.1, 0.2 and 0.3) catalysts were successfully fabricated by the impregnation/solution combustion synthesis method to produce biodiesel from sunflower oil. Various physicochemical analyses were carried out to characterize the synthesized nanocatalysts. So, the best physicochemical properties are related to the BaO/Ba0.2Mg0.8Fe2O4 sample, which led to better catalytic activity that 97.5% conversion was achieved. The reusability of prepared nanocatalysts was also examined that slight deviation after 6 experiments was detected. [Display omitted]