A novel beta-CD- Hemin complex photocatalyst for efficient degradation of organic pollutants at neutral pHs under visible irradiation

Article Abstract:

A novel photooxidative system for degrading toxic organic pollutants, including organic dyes and small molecular compounds such as Rhodamine B (RhB) and 2,4-dichlorophenol (DCP), is reported. A metal-organic complex (beta-cyclodextrin-hemin, CDH), synthesized by combining beta-CD with the bioactive small molecule hemin, can efficiently activate hydrogen peroxide to oxidize and mineralize the target compounds in aqueous media at neutral pHs under ambient conditions of temperature and pressure and with visible light irradiation.

Methods, Interference (Light), Optical interference

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Efficient H2O2 oxidation of organic pollutants catalyzed by supported iron sulfophenylprophyrin under visible light irradiation

Article Abstract:

A novel photocatalytic oxidation system, consisting of H2O2 and FeTPPS4 supported on a resin, is used to photodegrade the toxic and nonbiodegradable organic pollutants, Sulforhodamine B (SRB) and 2,4-dichlirophenol (DCP), in an aqueous solution. The FePR/H2O2 photocatalytic system, exhibits higher catalytic activity and better stability than FeTPPS4, provides new possibilities for the oxidative removal of persistent organic pollutants in aquatic environment under visible light irradiation.

Chemistry, Physical and theoretical, Physical chemistry

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Mechanism of TiO2-assisted photocatalytic degradation of dyes under visible irradiation: Photoelectrocatalytic study by TiO2-film electrodes

Article Abstract:

Photoelectrocatalytic degradation of various dyes under visibility light irradiations with a TiO2 nanoparticles electrode were investigated to reveal the mechanism for TiO2-assisted photoelectrocatalytic degradation. The experimental results imply both the superoxide anionic radical and the dye cationic radical and the dye cationic radical were essential to the mineralization of the dyes under visible light-induced photoelectrocatalytic conditions.

Titanium dioxide, Atomic properties, Nanoparticles

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