Influence of different activation strategies on the activity and stability of MIL-53(Fe) as a dark-Fenton heterogeneous catalyst

GABRIELA A. ORTEGA MORENO; MARÍA C. BERNINI; ANDRÉS A. GARCÍA BLANCO; SERGIO G. MARCHETTI; BIBIANA P. BARBERO; GRISELDA E. NARDA

MICROPOROUS AND MESOPOROUS MATERIALS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2020

1387-1811

MIL-53(Fe) was synthesized using solvothermal method without HF. Threedifferent activation methodologies were applied in order to remove N,Ndimethylformamide(DMF) from the inner pores of the material. The incidence of thesetreatments in the activity and stability as heterogeneous catalyst in a dark-Fentonreaction was evaluated for Rhodamine 6G (Rh6G) degradation. Importantimprovements in the catalytic performance of MIL-53(Fe) were obtained after activation.Operational variables such as pH, reaction temperature, [H2O2]/[Fe3+] molar ratio, andinitial Rh6G concentration were evaluated. Likewise, catalyst reusability assays werealso performed. The obtained results indicate that a partial removal of DMF affects notonly the stability but also the catalytic activity of MIL-53(Fe) in the Fenton reaction.Different solid state characterization techniques, including PXRD, SEM, FTIR, elementalanalysis, XPS, and Mössbauer spectroscopy, were applied to the as-synthesized andactivated materials as well as post-reaction catalysts in order to understand the catalyticbehavior.