Solvothermal fabrication and growth behavior study of spherical MnFe2O4 through a bottom-up method on wood substrate with effective microwave absorption
Spherical MnFe2O4 colloidal nanocrystal assemblies (CNAs) with different sizes were controllably fabricated on a wood substrate using a solvothermal method through a bottom-up pathway. The sizes of the spherical MnFe2O4, which ranged from 50 nm to 360 nm, could be simply adjusted by a synthetic reagent in the MnFe2O4 CNAs solution composed of primary crystalline with sizes of 12.7–32.4 nm. By studying the fabrication and growth behaviors of spherical MnFe2O4 during the solvothermal reaction, the MnFe2O4/wood composite was successfully synthesized with effective microwave absorption property. Moreover, the as-prepared MnFe2O4/wood hybrids exhibited an effective microwave absorption bandwidth and the minimum reflection loss of composite reached −12 dB at 15.52 GHz.