Mondal, Tapashree and Chatterjee, Debabrata (2016) RuIII-edta (edta4− = ethylenediaminetetraacetate) mediated photocatalytic conversion of bicarbonate to formate over visible light irradiated non-metal doped TiO2 semiconductor photocatalysts. RSC Advances, 6 (68). pp. 63488-63492.

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Reported in this paper is the first example of a ruthenium(III) complex, [RuIII(edta)] (edta4− = ethylenediaminetetraacetate), that catalyzes the conversion of bicarbonate to formate selectively over a visible light irradiated surface of carbon, nitrogen and sulfur doped TiO2 (represented as C–TiO2, N–TiO2 and S–TiO2, respectively) semiconductor photocatalyst particles. Formation of formate, the only reduction product, was identified by 13C NMR analysis of the reaction mixture. Based on the experimental findings a working mechanism involving activation of bicarbonate (HCO3−) through the formation of a [RuIII(edta)(HCO3)]2− intermediate complex followed by the photochemical reduction of the coordinated bicarbonate to produce formate at the surface of non-metal (C, N, S) doped TiO2 semiconductor particles is proposed. The efficacy of bicarbonate reduction over such photocatalysts decreased in the following order C–TiO2 > N–TiO2 > S–TiO2.

Item Type: Article
Subjects: Chemistry
Depositing User: Dr. Sarita Ghosh
Date Deposited: 10 Jul 2017 12:42
Last Modified: 10 Jul 2017 12:42

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