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Activated carbon-supported bimetallic cerium-manganese(Ce-Mn/AC) materials were prepared by impregnation method to study the effect of calcination temperature on the structure and adsorption performance of absorbents. The obtained materials were characterized by using X-ray diffraction(XRD), scanning electron microscope(SEM), N_2 adsorption-desorption isotherm, Fourier transformed infrared(FT-IR), and X-ray photoelectron spectroscopy(XPS). As the results showed, the diffraction peaks of CeO_2 decreased and even disappeared; Mn species were transformed from Mn_3O_4 to Mn_2O_3 on the surface of Ce-Mn/AC; the BET specific surface area increased first and then decreased on the elevating calcination temperature; the number of acid functions of AC was reduced after being modified by cerium and manganese. All these changes were directly attributed to the synergistic effects between Mn Ox and CeO_2. AC800 exhibited the best phenol adsorption capacity. The adsorption mechanism of phenol on Ce-Mn/AC was discussed with hydrophilic(hydrophobic) interaction and hard and soft acid-base theory.
Activated carbon-supported bimetallic cerium-manganese (Ce-Mn / AC) materials were prepared by impregnation method to study the effect of calcination temperature on the structure and adsorption performance of absorbents. The obtained materials were characterized by using X-ray diffraction (XRD ), the scanning electron microscope (SEM), N 2 adsorption-desorption isotherm, Fourier transformed infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS) species were transformed from Mn_3O_4 to Mn_2O_3 on the surface of Ce-Mn / AC; the BET specific surface area increased first and then decreased on the elevating calcination temperature; the number of acid functions of AC was reduced after being modified by cerium and manganese. All these changes were directly attributed to the synergistic effects between Mn Ox and CeO 2. AC 800 exhibited the best phenol adsorption capacity. The adsorption mechanism of phenol on Ce-M n / AC was discussed with hydrophilic (hydrophobic) interaction and hard and soft acid-base theory.