Synthesis of MnFe2O4 hollow microspheres via a sacrificial templates approach

[摘要] Manganese ferrite (MnFe2O4) hollow microspheres were synthesized through a sacrificial template approach using manganese carbonate (MnCO3) microspheres as sacrificial templates. Different from the literatures, the synthesis of MnFe2O4hollow spheres was achieved through a one-pot hydrothermal process without subsequent calcination process. The temperature and reaction time of the hydrothermal process were set to be 180 °C and 8 h. The formation mechanism of the MnFe2O4hollow microspheres was also investigated. Results indicate that the average diameter of the as-synthesized MnFe2O4hollow microspheres is 1.2 μm. The shells of the hollow microspheres are composed of nanoparticles. During hydrothermal process, Mn2+ ions diffused outward and resulted in shell materials of MnFe2O4, thus MnCO3templates were consumed and MnFe2O4hollow microspheres were obtained.

[发布机构] College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao, China^1;College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China^2

[效力级别] 化学 [学科分类] 材料科学（综合）

[关键词] Average diameter;Formation mechanism;Hollow microsphere;Hollow sphere;Hydrothermal process;Manganese carbonate;Manganese ferrites;Sacrificial templates