Chatterjee, Debabrata and Rothbart, Sabine and Eldik, Rudi van (2013) Substrate versus oxidant activation in RuIII(edta) catalyzed dye degradation. RSC Advances, 3 (11). pp. 3606-3610.

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Abstract

The [RuIII(edta)(H2O)]− (edta4− = ethylenediaminetetraacetate) catalyzed oxidative degradation of methylene blue (MB) in the presence of H2O2 has been achieved. Complete degradation of 0.05 mM MB was noticed within 300 s in the presence of 5.0 μM of Ru(edta) catalyst under ambient conditions. Catalytic degradation of the dye was investigated by using rapid-scan spectrophotometry as a function of [Ru(edta)], [H2O2], [MB] and pH at 25 °C. Spectral analyses and kinetic data point towards a catalytic pathway that involves the rapid coordination of MB to the RuIII(edta) complex to yield [RuIII(edta)(MB)]− species that react directly with hydrogen peroxide. The catalytic-active intermediate [RuIII(edta)(OOH)]2− was also found to be operative at high H2O2 concentration over the Ru(edta) catalyst in effecting MB degradation under the specified conditions.

Item Type:	Article
Subjects:	Chemistry
Depositing User:	Dr. Sarita Ghosh
Date Deposited:	21 Sep 2016 12:22
Last Modified:	21 Sep 2016 12:22
URI:	http://cmeri.csircentral.net/id/eprint/306

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