Solvothermal fabrication and growth behavior study of spherical MnFe2O4 through a bottom-up method on wood substrate with effective microwave absorption

Abstract

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.