Figure 8

N2 adsorption–desorption isotherms of the precursor black phosphate (RB-Ph) in comparison with those of its modified derivatives, calcination at 550 ℃/4 h (CB-Ph), 30% hydrogen peroxide (HB-Ph) and intensive grinding to nano-sizes (NB-Ph).

N2 adsorption–desorption isotherms of the precursor black phosphate (RB-Ph) in comparison with those of its modified derivatives, calcination at 550 ℃/4 h (CB-Ph), 30% hydrogen peroxide (HB-Ph) and intensive grinding to nano-sizes (NB-Ph).