• visible light assisted fenton-like degradation of rhodamine b and 4-nitrophenol solutions with a stable poly-hydroxyl-iron/sepiolite catalyst

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 496
    • تعداد پرسش و پاسخ ها: 0
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     an efficient heterogeneous catalyst poly-hydroxyl-iron/sepiolite (h-fe-s) was successfully prepared for photo-assisted fenton-like reaction by a simple impregnation method. the characterization results (xrd, xps, bet) of the h-fe-s catalyst suggested that hydroxyl-iron polycations were present in the sepiolite. the catalytic activity of the h-fe-s catalyst was evaluated by the degradation, chemical oxygen demand (cod) and total organic carbon (toc) removal of a xanthene dye rhodamine b (rhb) and a typical persistent organic pollutant 4-nitrophenol (4-np) in the presence of hydrogen peroxide (h2o2) under visible light irradiation (λ > 420 nm). the results showed that the h-fe-s catalyst had good catalytic property for the degradation of both organic contaminants. fourier transform infrared (ft-ir) analysis of the h-fe-s catalyst indicated that the catalyst showed good stability for the degradation of rhb even after five recycles. finally, a possible photocatalytic mechanism was proposed.

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