Journal
FUNCTIONAL MATERIALS LETTERS
Volume 11, Issue 1, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793604718500170
Keywords
Merocyanine dyes; sensitizing; heterostructure; titania; methylene blue; photocatalytic activity
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Three merocyanine dyes (D) with various polymethine chain lengths were checked for their applicability as sensitizers for TiO2. Based on the absorption data and cyclic voltammetric redox potentials, the lower unoccupied molecular orbital (LUMO) energy was calculated. The LUMO energy was higher than the conductance band edge energy of the anatase-type TiO2 for all the dyes, meaning that they all can act as efficient sensitizers for various functional materials to be used in the wide-zone visible light solar cells, toxic wastes decontamination technologies and other similar applications. Merocyanines applicability as effective sensitizing agents was approved by construction of the heterostructures (HS) D/TiO2 consisting of the merocyanines and acting as photocatalysts in the test reaction of methylene blue (MB) reduction by formaldehyde.
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