TiO2 thin films sensitization with natural dyes extracted from Bactris guineensis for photocatalytic applications: Experimental and DFT study
MetadataShow full item record
TiO2 thin films, sensitized by an anthocyanins-rich extract of a common species found in the Colombian Caribbean region (Bactris guineensis fruits), were used for the photocatalytic degradation of methylene blue. The sensitization process was verified by diffuse reflectance spectroscopy (DRS). The qualitative and quantitative analyses of the anthocyanins were carried out using high-performance liquid chromatography with photodiode array detection (HPLC-DAD), which provided the total content anthocyanin equivalent to delphinidin chloride (TAEDC) per mL of the extract, of 10.0 ± 0.8 µg TAEDC/mL. Here, three main anthocyanins were identified, being cyanidin-3-rutinoside the most abundant constituent (ca. 76%). The interaction of the dyes with a TiO2 slab model and their adsorption energies were determined through computational simulations. In addition, the molecular modelling evidenced that the sensitization of the semiconductor improved the light absorption in the visible range of the spectrum. As a final point, the photocatalytic test showed that the photocatalytic activity increased 26% for TiO2/B. guineensis thin films under visible radiation respect to bare TiO2. © 2020 The Authors
Showing items related by title, author, creator and subject.
Improvement of the photocatalytic activity of TiO2 using Colombian Caribbean species (Syzygium cumini) as natural sensitizers: Experimental and theoretical studies (2020) Díaz-Uribe C.; Vallejo W.; Campos K.; Solano W.; Andrade J.; Muñoz-Acevedo A.; Schott E.; Zarate X. (Elsevier Ltd, 2018)
Potential use of an anthocyanin-rich extract from berries of Vaccinium meridionale Swartz as sensitizer for TiO2 thin films – An experimental and theoretical study (2020) Diaz-Uribe C.; Vallejo W.; Camargo G.; Muñoz-Acevedo A.; Quiñones C.; Schott E.; Zarate X. (Elsevier B.V., 2019)
Photocatalytic degradation of methylene blue by the Anderson-type polyoxomolybdates/TiO2 thin films (2020) Diaz-Uribe C.E.; Rodríguez A.; Utria D.; Vallejo W.; Puello E.; Zarate X.; Schott E. (Elsevier Ltd, 2018)