Preparation of porous [alpha]-Fe[sub]2O[sub]3 thin films for efficient photoelectrocatalytic degradation of basic blue 41 dyeMachreki, Manel (Avtor)
Chouki, Takwa (Avtor)
Martelanc, Mitja (Avtor)
Butinar, Lorena (Avtor)
Mozetič Vodopivec, Branka (Avtor)
Emin, Saim (Avtor)
thin filmsphotoelectrocatalysiskineticsvisible lightdegradationtextile dyeA novel method was developed for the preparation of porous hematite (α-Fe2O3) thin films. First, a solution containing iron precursor was spin-coated on fluorine-doped tin oxide substrate and later short heat-treated at 750 °C. The prepared α-Fe2O3 thin films were applied as dual-function catalyst in photoelectrochemical (PEC) water oxidation and textile dye degradation studies. For the first time, α-Fe2O3 thin films were used in efficient PEC degradation of a textile dye (Basic Blue 41 – B41) using in-situ generated reactive chlorine species. In comparison with photocatalytic and electrocatalytic approaches, the PEC technique allows faster degradation of B41 dye at an applied bias potential of 1.5 V versus reversible hydrogen electrode and under visible light illumination. In the presence of Cl− using the PEC approach the degradation of B41 reaches 99.8%. High-performance liquid chromatography coupled with UV–VIS system confirmed the degradation of B41 dye using PEC. Gas-chromatography coupled to mass spectrometry was used to study the by-products obtained during PEC degradation. Chemical oxygen demand analyses confirmed that the mineralization level of B41 is in the order of 68%. The α-Fe2O3 films developed in this study give a higher level of PEC degradation efficiency compared to other iron oxide-based systems.20212021-05-09 23:42:16Neznano6524COBISS_ID: 62466051UDK: 54ISSN pri članku: 2213-3437DOI: 10.1016/j.jece.2021.105495NUK URN: URN:SI:UNG:REP:GOVXBPCQsl