TY - JOUR
T1 - Magnetic ordered mesoporous Fe 3 O 4 /CeO 2 composites with synergy of adsorption and Fenton catalysis
AU - Li, Keyan
AU - Zhao, Yongqin
AU - Song, Chunshan
AU - Guo, Xinwen
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 21401017, 21236008) and the Fundamental Research Funds for the Central Universities (Grant No. DUT16LK12).
Publisher Copyright:
© 2017 Elsevier B.V.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2017/12/15
Y1 - 2017/12/15
N2 - Magnetic Fe 3 O 4 /CeO 2 composites with highly ordered mesoporous structure and large surface area were synthesized by impregnation-calcination method, and the mesoporous CeO 2 as support was synthesized via the hard template approach. The composition, morphology and physicochemical properties of the materials were characterized by XRD, SEM, TEM, XPS, Raman spectra and N 2 adsorption/desorption analysis. The mesoporous Fe 3 O 4 /CeO 2 composite played a dual-function role as both adsorbent and Fenton-like catalyst for removal of organic dye. The methylene blue (MB) removal efficiency of mesoporous Fe 3 O 4 /CeO 2 was much higher than that of irregular porous Fe 3 O 4 /CeO 2 . The superior adsorption ability of mesoporous materials was attributed to the abundant oxygen vacancies on the surface of CeO 2 , high surface area and ordered mesoporous channels. The good oxidative degradation resulted from high Ce 3+ content and the synergistic effect between Fe and Ce. The mesoporous Fe 3 O 4 /CeO 2 composite presented low metal leaching (iron 0.22 mg L −1 and cerium 0.63 mg L −1 ), which could be ascribed to the strong metal-support interactions for dispersion and stabilization of Fe species. In addition, the composite can be easily separated from reaction solution with an external magnetic field due to its magnetic property, which is important to its practical applications.
AB - Magnetic Fe 3 O 4 /CeO 2 composites with highly ordered mesoporous structure and large surface area were synthesized by impregnation-calcination method, and the mesoporous CeO 2 as support was synthesized via the hard template approach. The composition, morphology and physicochemical properties of the materials were characterized by XRD, SEM, TEM, XPS, Raman spectra and N 2 adsorption/desorption analysis. The mesoporous Fe 3 O 4 /CeO 2 composite played a dual-function role as both adsorbent and Fenton-like catalyst for removal of organic dye. The methylene blue (MB) removal efficiency of mesoporous Fe 3 O 4 /CeO 2 was much higher than that of irregular porous Fe 3 O 4 /CeO 2 . The superior adsorption ability of mesoporous materials was attributed to the abundant oxygen vacancies on the surface of CeO 2 , high surface area and ordered mesoporous channels. The good oxidative degradation resulted from high Ce 3+ content and the synergistic effect between Fe and Ce. The mesoporous Fe 3 O 4 /CeO 2 composite presented low metal leaching (iron 0.22 mg L −1 and cerium 0.63 mg L −1 ), which could be ascribed to the strong metal-support interactions for dispersion and stabilization of Fe species. In addition, the composite can be easily separated from reaction solution with an external magnetic field due to its magnetic property, which is important to its practical applications.
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U2 - 10.1016/j.apsusc.2017.07.041
DO - 10.1016/j.apsusc.2017.07.041
M3 - Article
AN - SCOPUS:85024129922
VL - 425
SP - 526
EP - 534
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -