Abstract
Graphitic carbon nitride (g-C3N4) is a photocatalyst with wide application in removal of organic pollutants. In this study, we designed a porous g-C3N4 (p-g-C3N4)/8-quinolinolato iron(III) (Q3Fe)/H2O2 system to enhance the organic pollutant removal efficiency by combining photocatalysis and Fenton interaction under neutral condition. The p-g-C3N4 was prepared through a two-step thermal oxidation reaction. Afterwards, Q3Fe-coupled p-g-C3N4 was prepared by an impregnating method. The 2,4-dichlorophenol (2,4-DCP) photodegradation ratio and decomposition rate of the p-g-C3N4/Q3Fe/H2O2 system are approximately 5 and 18 times as high as those of individual p-g-C3N4 system, respectively. Besides, its degradation rate is 4.3 times as high as that in the p-g-C3N4/H2O2 system. Meanwhile, Q3Fe/g-C3N4 also exhibits higher activity than individual p-g-C3N4 in 2,4-DCP photo-decomposing. On the basis of the results of the radical trapping experiments and the Fe(II) concentration in different systems, the synergistic effect between photocatalysis and Fenton reaction is vital for the efficient pollutant degradation. The coupled system combining p-g-C3N4 with Q3Fe and H2O2 shows potential for efficient treatment of recalcitrant organic pollutants. The combined system in this work indicated a new idea for the decomposition of organic pollutants.
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The authors thank the Analytical and Testing Center of SCNU for SEM and TEM measurements.
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Feng, W., Zhang, L., Fang, J. et al. Improved Photodegradation Efficiency of 2,4-DCP Through a Combined Q3Fe(III)-Decorated Porous g-C3N4/H2O2 System. Water Air Soil Pollut 228, 373 (2017). https://doi.org/10.1007/s11270-017-3564-5
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DOI: https://doi.org/10.1007/s11270-017-3564-5