Co3O4 @ PFR cube-like core-shell nanocomposite prepared via a facile one-step hydrothermal approach

The Co3O4 @ phenol formaldehyde resin (PFR) cube-like nanocomposites are prepared by one-step hydrothermal process at 120-180 A degrees C for 3-9 h. Co(NO3)(2)center dot 6H(2)O, hexamethylenetetramine (HMT), and phenol are used as precursors in water solvent. Any adventitious oxidants and additives are not presented. The transmission/scanning electronic microscope (TEM, SEM) images show as-obtained typical samples are consisted of cube-like Co3O4 as core and PFR as shell. The X-ray diffraction (XRD) data indicate the samples are consisted of cube-phase Co3O4 with amorphous PFR. Fourier transform infrared spectra (FTIR) further confirm Co3O4 and PFR are contained in the samples. Room-temperature vibration magnetic strength measurements (VMS) indicate that the antiferromagnetic properties of core-shell nanocomposites evidently differ from the naked-Co3O4 nanoparticles.