Heterogeneous oxidation of the dye Brilliant Green with H2O2 catalyzed by supported manganese porphyrins
作者： Geani Maria Ucoski , Guilherme Sippel Machado , Gilson de Freitas Silva , Fábio Souza Nunes , Fernando Wypych
DOI: 10.1016/J.MOLCATA.2015.07.020
关键词:
摘要: Abstract Synthetic metalloporphyrins can oxidize organic substrates efficiently and selectively in the presence of different oxygen donors. In an attempt to propose new catalytic systems treat industrial effluents, researchers have recently turned their attention performance metalloporphyrin-based catalysts bleaching reactions dyes used textile industry. The present work has investigated cationic [Mn(T4MPyP)]Ac 5 ( MnP1 ) [Mn(Br 8 T3MPyP)]Cl MnP2 immobilized on two inorganic supports, namely magnetite coated with silica obtained by hydrolytic sol-gel process S-Mag nanotubes raw halloysite clay mineral Hallo ), as reaction dye Brilliant Green hydrogen peroxide (30%). elicited up 22.9 times higher rates compared control reactions. It was possible use complexes successive oxidation without significant decrease activity. MnP-S-Mag displayed magnetic properties, which allowed fast separation from medium aid a simple magnet. A 2 k full factorial design (4 factors levels) study catalyst under experimental conditions, showed that time molar ratio affected reaction.
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