Visible light sensitive mesoporous nanohybrids of lepidocrocite-like ferrititanate coupled to a charge transfer complex: Synthesis, characterization and photocatalytic degradation of NO
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2018
Authors
Habran, MargaritaPontón, Patricia I.

Mančić, Lidija

Pandoli, Omar

Krambrock, Klaus
Maia da Costa, Marcelo Eduardo Huguenin
Letichevsky, Sonia

Costa, Antonio Mario Leal Martins

Morgado, Edisson Jr.
Marinković, Bojan A.
Article (Published version)

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The efficiency of photo-oxidation of pollutants catalysed by semiconductors is still limited for real-world applications due to several drawbacks, such as a) insufficient absorption of visible radiation, which predominates in solar spectrum, b) rapid free electron to hole recombination, c) small surface area, built from equilibrium crystallographic facets with low adsorption capacities and d) photo-corrosion. The present study disclosures new mesoporous heterostructures, built from exfoliated lepidocrocite-like ferrititanates and TiO2 (anatase)-acetylacetone charge transfer complex, capable of reducing free electron-to-hole recombination rate through a robust charge separation and sensitive to the visible light spectrum. The synthesis route is based on soft-chemistry and low temperature calcination at 300 °C. Two different partially pillarized heterostructures, denoted as HM-1 and HM-2, have been synthesized. It was observed that the heterostructure HM-1 was four times more active towa...rd photocatalytic degradation of NO gas in comparison to the benchmark photocatalytic material P25. The lower activity of the heterostructure HM-2, comparable to that of P-25, was attributed to the high value of Urbach energy that indicates high number of defect sites within energy band-gap of the constituent semiconductor components. [Ti] anatase/[Ti] ferrititanate mol ratio might also play a role in photocatalytic efficiency. © 2018 Elsevier B.V.
Keywords:
acetylacetonate / air remediation / charge separation / heterostructure / TiO2-based nanostructuresSource:
Journal of Photochemistry and Photobiology A: Chemistry, 2018, 365, 133-144Publisher:
- Elsevier
Projects:
- National Council for Scientific and Technological Development of Brazil
Note:
- Supporting information: http://dais.sanu.ac.rs/123456789/3758
DOI: 10.1016/j.jphotochem.2018.07.038
ISSN: 1010-6030
WoS: 000444356600018
Scopus: 2-s2.0-85051045212
TY - JOUR AU - Habran, Margarita AU - Pontón, Patricia I. AU - Mančić, Lidija AU - Pandoli, Omar AU - Krambrock, Klaus AU - Maia da Costa, Marcelo Eduardo Huguenin AU - Letichevsky, Sonia AU - Costa, Antonio Mario Leal Martins AU - Morgado, Edisson Jr. AU - Marinković, Bojan A. PY - 2018 UR - http://dais.sanu.ac.rs/123456789/3692 AB - The efficiency of photo-oxidation of pollutants catalysed by semiconductors is still limited for real-world applications due to several drawbacks, such as a) insufficient absorption of visible radiation, which predominates in solar spectrum, b) rapid free electron to hole recombination, c) small surface area, built from equilibrium crystallographic facets with low adsorption capacities and d) photo-corrosion. The present study disclosures new mesoporous heterostructures, built from exfoliated lepidocrocite-like ferrititanates and TiO2 (anatase)-acetylacetone charge transfer complex, capable of reducing free electron-to-hole recombination rate through a robust charge separation and sensitive to the visible light spectrum. The synthesis route is based on soft-chemistry and low temperature calcination at 300 °C. Two different partially pillarized heterostructures, denoted as HM-1 and HM-2, have been synthesized. It was observed that the heterostructure HM-1 was four times more active toward photocatalytic degradation of NO gas in comparison to the benchmark photocatalytic material P25. The lower activity of the heterostructure HM-2, comparable to that of P-25, was attributed to the high value of Urbach energy that indicates high number of defect sites within energy band-gap of the constituent semiconductor components. [Ti] anatase/[Ti] ferrititanate mol ratio might also play a role in photocatalytic efficiency. © 2018 Elsevier B.V. PB - Elsevier T2 - Journal of Photochemistry and Photobiology A: Chemistry T1 - Visible light sensitive mesoporous nanohybrids of lepidocrocite-like ferrititanate coupled to a charge transfer complex: Synthesis, characterization and photocatalytic degradation of NO SP - 133 EP - 144 VL - 365 DO - 10.1016/j.jphotochem.2018.07.038 ER -
@article{ author = "Habran, Margarita and Pontón, Patricia I. and Mančić, Lidija and Pandoli, Omar and Krambrock, Klaus and Maia da Costa, Marcelo Eduardo Huguenin and Letichevsky, Sonia and Costa, Antonio Mario Leal Martins and Morgado, Edisson Jr. and Marinković, Bojan A.", year = "2018", url = "http://dais.sanu.ac.rs/123456789/3692", abstract = "The efficiency of photo-oxidation of pollutants catalysed by semiconductors is still limited for real-world applications due to several drawbacks, such as a) insufficient absorption of visible radiation, which predominates in solar spectrum, b) rapid free electron to hole recombination, c) small surface area, built from equilibrium crystallographic facets with low adsorption capacities and d) photo-corrosion. The present study disclosures new mesoporous heterostructures, built from exfoliated lepidocrocite-like ferrititanates and TiO2 (anatase)-acetylacetone charge transfer complex, capable of reducing free electron-to-hole recombination rate through a robust charge separation and sensitive to the visible light spectrum. The synthesis route is based on soft-chemistry and low temperature calcination at 300 °C. Two different partially pillarized heterostructures, denoted as HM-1 and HM-2, have been synthesized. It was observed that the heterostructure HM-1 was four times more active toward photocatalytic degradation of NO gas in comparison to the benchmark photocatalytic material P25. The lower activity of the heterostructure HM-2, comparable to that of P-25, was attributed to the high value of Urbach energy that indicates high number of defect sites within energy band-gap of the constituent semiconductor components. [Ti] anatase/[Ti] ferrititanate mol ratio might also play a role in photocatalytic efficiency. © 2018 Elsevier B.V.", publisher = "Elsevier", journal = "Journal of Photochemistry and Photobiology A: Chemistry", title = "Visible light sensitive mesoporous nanohybrids of lepidocrocite-like ferrititanate coupled to a charge transfer complex: Synthesis, characterization and photocatalytic degradation of NO", pages = "133-144", volume = "365", doi = "10.1016/j.jphotochem.2018.07.038" }
Habran M, Pontón PI, Mančić L, Pandoli O, Krambrock K, Maia da Costa MEH, Letichevsky S, Costa AMLM, Morgado EJ, Marinković BA. Visible light sensitive mesoporous nanohybrids of lepidocrocite-like ferrititanate coupled to a charge transfer complex: Synthesis, characterization and photocatalytic degradation of NO. Journal of Photochemistry and Photobiology A: Chemistry. 2018;365:133-144
Habran, M., Pontón, P. I., Mančić, L., Pandoli, O., Krambrock, K., Maia da Costa, M. E. H., Letichevsky, S., Costa, A. M. L. M., Morgado, E. Jr.,& Marinković, B. A. (2018). Visible light sensitive mesoporous nanohybrids of lepidocrocite-like ferrititanate coupled to a charge transfer complex: Synthesis, characterization and photocatalytic degradation of NO. Journal of Photochemistry and Photobiology A: ChemistryElsevier., 365, 133-144. https://doi.org/10.1016/j.jphotochem.2018.07.038
Habran Margarita, Pontón Patricia I., Mančić Lidija, Pandoli Omar, Krambrock Klaus, Maia da Costa Marcelo Eduardo Huguenin, Letichevsky Sonia, Costa Antonio Mario Leal Martins, Morgado Edisson Jr., Marinković Bojan A., "Visible light sensitive mesoporous nanohybrids of lepidocrocite-like ferrititanate coupled to a charge transfer complex: Synthesis, characterization and photocatalytic degradation of NO" 365 (2018):133-144, https://doi.org/10.1016/j.jphotochem.2018.07.038 .