| Abstract
| - A novel photooxidative system for degrading toxic organic pollutants, including organic dyes and smallmolecular compounds such as Rhodamine B (RhB) and 2,4-dichlorophenol (DCP), is reported. A metal−organic complex (β-cyclodextrin−hemin, CDH), synthesized by combining β-CD with the bioactive smallmolecule hemin, can efficiently activate hydrogen peroxide to oxidize and mineralize the target compoundsin aqueous media at neutral pHs under ambient conditions of temperature and pressure and with visible lightirradiation (λ > 450 nm). The RhB and DCP were mineralized at yields of 72% and 85% at ratios of catalystto substrate of 1:200 and 1:1000, respectively. Meanwhile, the catalyst exhibited excellent stability. Thephotoreaction processes were examined by UV/vis spectroscopy, high-performance liquid chromatography,ion chromatography, IR, spin-trapping electron paramagnetic resonance, and total organic carbon measurements.A possible photooxidative mechanism for the degradation of organic pollutants in aqueous CDH/H2O2 solutionsunder visible light illumination is proposed on the basis of the experimental results.
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