Effects of Calcination Temperature on the Structure and Adsorption Performance of Ce-Mn/AC Materials

Activated carbon-supported bimetallic cerium-man- ganese （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）, sca...

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Bibliographic Details
Published in:Wuhan University journal of natural sciences 2017-10, Vol.22 (5), p.435-442
Main Authors: Gao, Wenwen, Zhang, Zhifang, Chen, Bi, Ma, Xiangrong, Yan, Biao
Format: Article
Language:English
Subjects:
Absorbents
Acids
Activated carbon
Adsorption
Bimetals
Biomedical and Life Sciences
Cerium
Computer Science
Fourier transforms
Hydrophobicity
Infrared spectroscopy
Life Sciences
Manganese
Materials Science
Phenols
Photoelectron spectroscopy
Roasting
Surface chemistry
Synergistic effect
Temperature effects
X ray photoelectron spectroscopy
X-ray diffraction
X-rays
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Summary:Activated carbon-supported bimetallic cerium-man- ganese （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）, N2 adsorption-desorption iso- therm, Fourier transformed infrared （FT-IR）, and X-ray photoelectron spectroscopy （XPS）. As the results showed, the diffraction peaks of CeO2 decreased and even disappeared; Mn species were transformed from Mn3O4 to Mn2O3 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 MnOx and CeO2. 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.
ISSN:1007-1202
1993-4998
DOI:10.1007/s11859-017-1269-7