TY - JOUR
T1 - Facile preparation of magnetic mesoporous Fe 3 O 4 /C/Cu composites as high performance Fenton-like catalysts
AU - Li, Keyan
AU - Zhao, Yongqin
AU - Janik, Michael J.
AU - Song, Chunshan
AU - Guo, Xinwen
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/2/28
Y1 - 2017/2/28
N2 - Fe-Cu composites with different compositions and morphologies were synthesized by a hydrothermal method combined with precursor thermal transformation. γ-Fe 2 O 3 /CuO and α-Fe 2 O 3 /CuO were obtained by calcining the Fe and Cu tartrates under air atmosphere at 350 °C and 500 °C, respectively, while Fe 3 O 4 /C/Cu was obtained by calcining the tartrate precursor under N 2 atmosphere at 500 °C. The Fe 3 O 4 /C/Cu composite possessed mesoporous structure and large surface area up to 133 m 2 g −1 . The Fenton catalytic performance of Fe 3 O 4 /C/Cu composite was closely related to the Fe/Cu molar ratio, and only proper amounts of Fe and Cu exhibited a synergistic enhancement in Fenton catalytic activity. Cu inclusion reduced Fe 3+ to Fe 2+ , which accelerated the Fe 3+ /Fe 2+ cycles and favored H 2 O 2 decomposition to produce more hydroxyl radicals for methylene blue (MB) oxidation. Due to the photo-reduction of Fe 3+ and Cu 2+ , the Fenton catalytic performance was greatly improved when amending with visible light irradiation in the Fe 3 O 4 /C/Cu-H 2 O 2 system, and MB (100 mg L −1 ) was nearly removed within 60 min. The Fe 3 O 4 /C/Cu composite showed good recyclability and could be conveniently separated by an applied magnetic field. Compared with conventional methods for mesoporous composite construction, the thermolysis method using mixed metal tartrates as precursors has the advantages of easy preparation and low cost. This strategy provides a facile, cheap and green method for the synthesis of mesoporous composites as excellent Fenton-like catalysts, without any additional reductants or organic surfactants.
AB - Fe-Cu composites with different compositions and morphologies were synthesized by a hydrothermal method combined with precursor thermal transformation. γ-Fe 2 O 3 /CuO and α-Fe 2 O 3 /CuO were obtained by calcining the Fe and Cu tartrates under air atmosphere at 350 °C and 500 °C, respectively, while Fe 3 O 4 /C/Cu was obtained by calcining the tartrate precursor under N 2 atmosphere at 500 °C. The Fe 3 O 4 /C/Cu composite possessed mesoporous structure and large surface area up to 133 m 2 g −1 . The Fenton catalytic performance of Fe 3 O 4 /C/Cu composite was closely related to the Fe/Cu molar ratio, and only proper amounts of Fe and Cu exhibited a synergistic enhancement in Fenton catalytic activity. Cu inclusion reduced Fe 3+ to Fe 2+ , which accelerated the Fe 3+ /Fe 2+ cycles and favored H 2 O 2 decomposition to produce more hydroxyl radicals for methylene blue (MB) oxidation. Due to the photo-reduction of Fe 3+ and Cu 2+ , the Fenton catalytic performance was greatly improved when amending with visible light irradiation in the Fe 3 O 4 /C/Cu-H 2 O 2 system, and MB (100 mg L −1 ) was nearly removed within 60 min. The Fe 3 O 4 /C/Cu composite showed good recyclability and could be conveniently separated by an applied magnetic field. Compared with conventional methods for mesoporous composite construction, the thermolysis method using mixed metal tartrates as precursors has the advantages of easy preparation and low cost. This strategy provides a facile, cheap and green method for the synthesis of mesoporous composites as excellent Fenton-like catalysts, without any additional reductants or organic surfactants.
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U2 - 10.1016/j.apsusc.2016.11.170
DO - 10.1016/j.apsusc.2016.11.170
M3 - Article
AN - SCOPUS:85006797731
SN - 0169-4332
VL - 396
SP - 1383
EP - 1392
JO - Applied Surface Science
JF - Applied Surface Science
ER -