Abstract
The organic-inorganic layered solid catalyst Fe(bpy) 2+3 -laponite was able to photode-grade Rhodamine B (RhB) by activation of dioxygen under visible irradiation (λ> 420 nm), while the homogeneous aqueous solution Fe(bpy) 2+3 showed no photoactivity. The catalyst could be repeatedly used and retained its reactivity. The hybrid catalyst could be separated from the suspension by centrifugation or sedimentation. The TOC removal yield of RhB was measured. Reactive oxygen species (ROS) formed during degradation was detected by EPR. A possible mechanism was proposed on the basis of the experimental results.
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References
Pulgarin C, Kiwi J. Iron oxide-mediated degradation, photode-gradation, and biodegradation of aminophenols. Langmuir, 1995, 11: 519–526
Cheng M, Ma W, Zhao J, et al. Visible-light-assisted degradation of dyes pollutants over Fe(III)-loaded resin in the presence of H2O2 at neutral pH values. Environ Sci Technol, 2004, 38: 1569–1575
Sorokin A, Meunier B. Efficient H2O2 oxidation of chlorinated phenols catalyzed by supported iron phthalocyanine. J Chem Soc, Chem Commun, 1994, 1799–1800
Tao X, Ma W, Zhao J, et al. Efficient degradation of organic pollutants mediated by immobilized iron tetrasulfophthalocyanine under visible irradiation. Chem Commun, 2003, 80–81
Xiong Z, Xu Y, Zhu L, et al. Photosensitized oxidation of substituted phenols on aluminum phthalocyanine-intercalated organoclay. Environ Sci Technol, 2005, 39: 651–657
Feng J, Hu X, Yue P, et al. Degradation of azo-dye orange II by a photoassisted Fenton reaction using a novel composite of iron oxide and silicate nanoparticles as a catalyst. Ind Eng Chem Res, 2003, 42: 2058–2066
Li J, Ma W, Zhao J, et al. Oxidative degradation of organic pollutants utilizing molecular oxygen and visible light over a supported catalyst of Fe(bpy)2+ 3 in water. Appl Catal B: Environ, 2004, 48: 17–24
Chen F, Xie Y, Zhao J, et al. Photo-Fenton degradation of dyes in methanol solution under both UV and visible irradiation. J Photochem Photobiol A: Chem, 2001, 138: 139–146
Ma W, Li J, Zhao J, et al. Efficient degradation of organic pollutants by using dioxygen activated by resin-exchanged iron(II) bipyridine under visible irradiation. Angew Chem Int Ed, 2003, 42: 1029–1032
Collins T J. TAML oxidant activators: A new approach to the activation of hydrogen peroxide for environmentally significant problems. Acc Chem Res, 2002, 35: 782–790
Weber L, Hommel R, Behling J, et al. Photocatalytic oxygenation of hydrocarbons with (tetraarylporphyrinato)iron(III) complexes and molecular oxygen. Comparison with microsomal cytochrome P-450 mediated oxygenation reactions. J Am Chem Soc, 1994, 116: 2400–2408
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Cheng, M., Sun, Z., Ma, W. et al. Efficient degradation of dye pollutants using dioxygen mediated by iron(II) 2,2′-bipyridine loaded layered clay catalyst under visible irradiation. SCI CHINA SER B 49, 407–410 (2006). https://doi.org/10.1007/s11426-006-2016-7
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DOI: https://doi.org/10.1007/s11426-006-2016-7