6533b85bfe1ef96bd12bb60b

RESEARCH PRODUCT

Hybrid TiO2 @ phthalocyanine catalysts in photooxidation of 4-nitrophenol: Effect of the matrix and sensitizer type

Gabriela DyrdaAnna PoliwodaGiuseppe MeleRudolf SłotaKarina KocotSudipto Pal

subject

AnataseGeneral Chemical EngineeringHydroquinoneGeneral Physics and Astronomy02 engineering and technology010402 general chemistry01 natural sciences4-nitrophenolCatalysisChemical kineticsReaction ratechemistry.chemical_compoundMetallophthalocyaninesLanthanideLanthanidesHybrid photocatalystHydroquinoneChemistry4-NitrophenolGeneral Chemistry021001 nanoscience & nanotechnology0104 chemical sciencesMicrocrystallineChemical engineeringPhthalocyanineTitanium dioxideMetallophthalocyanine0210 nano-technologyHybrid photocatalysts

description

Abstract Microcrystalline and nanocrystalline anatase (TiO2) based hybrid photocatalysts including selected phthalocyanine sensitizers were explored in photooxidation of 4-nitrophenol (4-NP) in water. Composites obtained with the homemade pure nano-anatase displayed a very poor catalytic performance compared to the other ones prepared from the commercial Tioxide-Huntsman (micro) and Evonik P25 (nano) products. In particular, the microcrystalline anatase impregnated with sandwich phthalocyanines of Gd or Yb showed excellent results both in photooxidation of 4-NP and hydroquinone, and proved the only ones which completely removed these two compounds from the system during the same reaction cycle. Oxidation of hydroquinone is the presumed reaction rate controlling step and has proved critical to the mineralization of 4-NP. The properties of the studied hybrid photocatalysts have been discussed in terms of the reaction kinetics and practical application. Extensive experimental data have been attached in the Supplementary Information Appendix.

yearjournalcountryeditionlanguage
2020-01-01Journal of Photochemistry and Photobiology A: Chemistry
https://doi.org/10.1016/j.jphotochem.2019.112124