Synthesis of MIL-100(Fe) nanoparticles. MIL-100(Fe) nanoparticles were synthesized following the procedure described by García Márquez and coworkers, 20 by a microwave-assisted method. The assynthesized material was treated in a KF 0.1M solution for 2h and washed with H2O to remove excess of reagents. The particles were collected by centrifugation (9900 rpm, 20 min) and stored.