Microporous and Mesoporous Materials
Microporous and Mesoporous Materials
5 years ago

Oxidative removal of sulfa antibiotics by introduction of activated carbon fiber to enhance the catalytic activity of iron phthalocyanine

Oxidative removal of sulfa antibiotics by introduction of activated carbon fiber to enhance the catalytic activity of iron phthalocyanine
Supported metallophthalocyanine catalysts were synthesized by immobilizing covalently amino-containing iron trinitro phthalocyanine (FeMATNPc) on activated carbon fibers (ACF) by deamination to produce ACF-FeTNPc. The introduction of ACF enhanced the decomposition of sulfamethoxazole by FeMATNPc significantly with an obvious improvement in pH tolerance and stability. The oxidative removal of sulfamethoxazole(SMX) in the ACFs-FeTNPc/H2O2 system, based on phase-transfer catalytic oxidation, was investigated in aqueous solution by ultra-performance liquid chromatography. Repetitive tests showed that ACF-FeTNPc could maintain a high adsorption capacity and degradation activity over several cycles. The resulting hybrid structure was confirmed and characterized by X-ray photoelectron and ultraviolet–visible spectroscopy. ACF are rich in free electrons, and the π-conjugated macrocyclic structure of FeMATNPc may present convenient channels for the transfer of free electrons from the ACF, and promote the generation of hydroxyl radicals and high-valence iron species. Electron paramagnetic resonance spin-trap experiments and inhibition and probe studies indicated that free radicals and high-valence iron species reacted in our system.

Publisher URL: www.sciencedirect.com/science

DOI: S1387181117307187

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