Oxidative degradation of pentabromophenol in the presence of humic substances catalyzed by a SBA-15 supported iron-porphyrin catalyst

Magnetic HMS silica as a Support to Immobilization of Catalysts Based on Cationic Manganese Porphyrins

“…In our previous work, MnP3 was immobilized on S‐Mag (magnetite coated with amorphous silica), showing an immobilization percentage of 96 % for MnP3 . This high percentage may be accounted by the use of water as solvent (instead of methanol) and the alkaline medium, which leads to deprotonation of Si‐OH groups and favors the immobilization of cationic MPs . Additionally, according to Taguchi and Schüth the density of silanols in ordered porous materials is lower than in conventional silica, and it may also varies according to thermal pre‐treatment during the solid preparation, before immobilization.…”

Instant and quantitative epoxidation of styrene under ambient conditions over a nickel(ii)dibenzotetramethyltetraaza[14]annulene complex immobilized on amino-functionalized SBA-15

“…Two new peaks were appeared at 1556 (B) and 1419 (C) cm À1 which can be attributed to the vibrations C]N and C]C in Nitmtaa, respectively. 37 Peak of N-H bending (D) in Nitmtaa@N-SBA-15 attributed to NH 2 groups shied from 690 to lower frequency at 676 cm À1 which can be related to the coordinate bond between the lone pair electrons of NH 2 and vacant orbitals of nickel(II). Based on these ndings we concluded that Nitmtaa is successfully immobilized on the surface of N-SBA-15.…”

Catalytic oxidation of tetrabromobisphenol A by iron(III)-tetrakis(p-sulfonatephenyl)porphyrin catalyst supported on cyclodextrin polymers with potassium monopersulfate

“…HA is a major component of landfill leachates [33], and inhibits the oxidation of 2,4,6-tribromophenol, pentabromophenol and TBBPA by heterogeneous catalysts with iron(III)-porphyrins [10][11][12][13]. Fig.…”

“…To stabilize such catalysts in the presence of an oxygen donor, the iron(III)-porphyrin catalyst can be immobilized on a variety of supports [9]. For example, iron(III)-porphyrin catalysts have been immobilized on functionalized silica [10,11], metal oxides [12], mesoporous silica [13] and ion-exchange resins [14,15] for the degradation of bromophenols. In addition, such supported catalysts are usually recyclable.…”