Shedding light on hydroxyquinoline-based ruthenium sensitizers with a long-lived charge carrier to boost photocatalytic H2 evolution
IR@CMERI: CSIR- Central Mechanical Engineering Research Institute (CMERI), Durgapur
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Title |
Shedding light on hydroxyquinoline-based ruthenium sensitizers with a long-lived charge carrier to boost photocatalytic H2 evolution
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Creator |
Mondal, Indranil
Tiwari, Amritanjali Ghosh, Rajib Pal, Ujjwal |
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Subject |
Chemistry
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Description |
Three new hydroxyquinoline-coordinated ruthenium(II) sensitizers bearing a polypyridyl derivative anchor (R1, R2 and R3) were synthesized that could tether to visible light sensitization over a Pt–TiO2 system for hydrogen production. The highest hydrogen production yield of 225.2 μmol was obtained and a turnover number (TON) of 1734 (for 6 h) over R1/Pt–TiO2. The photoactivity of the as-prepared sensitizers was found to be predominantly influenced by the longer lifetime of the metal-to-ligand-charge transfer (MLCT) states and suitable redox properties of Ru(II) species in the heteroleptic complexes. Measurement of the binding kinetics revealed a comprehensive relationship between the adsorption behaviour of dyes onto a TiO2 surface and ligand influence on the hydrogen evolution activity. The dependence of the hydrogen generation rate was systematically screened at different dye concentrations (0.05–1.0 μmol/10 mg TiO2) and the results were correlated with their pertinent adsorption properties. The operational parameters like, pH of the medium and noble metal loading were taken into account for optimal photocatalytic performance.
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Publisher |
Royal Society of Chemistry
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Date |
2016
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Type |
Article
PeerReviewed |
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Identifier |
Mondal, Indranil and Tiwari, Amritanjali and Ghosh, Rajib and Pal, Ujjwal (2016) Shedding light on hydroxyquinoline-based ruthenium sensitizers with a long-lived charge carrier to boost photocatalytic H2 evolution. RSC Advances, 6 (47). 41165-41172 .
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Relation |
http://cmeri.csircentral.net/419/
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