Title:Degradation of Methylene Blue by [Ru<sup>III</sup>(hedtra)(H<sub>2</sub>O)]/H<sub>2</sub>O<sub>2</sub> Catalytic System
VOLUME: 3 ISSUE: 1
Author(s):Debabrata Chatterjee and Anna Katafias
Affiliation:Chemistry and Biomimetixcs Group, CSIR-Central Mechanical Engineering Research Institute, M.G.Avenue, Durgapur-713209, India.
Keywords:Dye degradation, hydrogen peroxide, kinetics and mechanism, methylene blue, ruthenium complex.
Abstract:The [RuIII(hedtra)(H2O)] (hedtra3- = N-hydroxyethylethylenediaminetriacetate) mediated oxidative degradation
of methylene blue (MB) in the presence of H2O2 has been achieved under ambient conditions. Based on the results of
spectral studies a catalytic pathway involving activation of the dye, MB through its coordination to the ruthenium centre
of Ru(hedtra) complex has been suggested. The catalytic-active intermediate [RuIII(hedtra)(OOH)]- was also found to be
operative at high H2O2 concentration in effecting MB degradation under the specified conditions. Results of the catalytic
studies have been discussed with reference to the data reported for the corresponding Ru(edta) (edta4- = ethylenediamineteraacetate)
complex.
