• photocatalytic degradation of 2,4,6-trichlorophenol over g-c3n4 under visible light irradiation

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 742
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     graphitic carbon nitride (g-c3n4) was synthesized by directly thermal condensation of dicyandiamide and characterized by xrd, xps, sem, tem and ft-ir. then the as-prepared catalyst was employed to degrade priority pollutant 2,4,6-trichlorophenol (2,4,6-tcp) under visible light irradiation (λ > 420 nm). the 2,4,6-tcp could be completely mineralized over g-c3n4, and the pseudo-first-order rate constant for 10−4 m 2,4,6-tcp degradation was 0.70 h−1 in the presence of 1 g/l catalyst. .o2- /.ooh was identified as the most important reactive species contributing to 2,4,6-tcp degradation in air. meanwhile, valence band holes (vb holes) of g-c3n4 was observed to play important roles for the degradation of 2,4,6-tcp at n2 gas ambient when metal ions were added as electron acceptors. the possible degradation pathway of 2,4,6-tcp was proposed.

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