Removal of methylene blue using tungsten(VI)-oxide immobilized on commercial PVC in the presence of simulated solar radiation

Reusable Fe2O3/TiO2/PVC Photocatalysts for the Removal of Methylene Blue in the Presence of Simulated Solar Radiation

“…XRD spectrum of PVC ( Figure S1 ) exhibits clear Bragg diffraction peaks that confirm the predominantly crystalline character of the sample. Our previous research also found a somewhat unexpected result for the polymer [ 25 ]. The technological procedure of polymer synthesis should be held responsible for the observed considerable changes in polymer crystallinity with variations in molar mass and sample preparation.…”

“…Figures S5–S7 show recorded Raman spectra of components (PVC, Fe 2 O 3 and TiO 2 ) and prepared samples. For such a low impurity concentration, only the most intense peak of TiO 2 (at the wavenumber around 634 cm −1 ) is noticeable on the obtained samples in addition to the structural spectrum of PVC [ 25 , 31 ]. Other peaks of TiO 2 as well as Fe 2 O 3 peaks are incorporated in the spectrum of PVC.…”

“…In our previous study, six materials using PVC were created, with the following composite percentages: 1.0%, 1.75%, 2.5%, 3.75%, 5.0%, and 7.5%. According to the results of the measurements, the removal of MB is best accomplished with a composite content of 2.5% on PVC [ 25 ]. As a result, 2.5% of the composite was employed in all experiments.…”

“…The efficiency of photodegradation decreases as the quantity of tablets increases further. This is the reason for using 29 tablets in the experiments [ 25 ]. After that, the photoreactor was mounted on the lens so that the radiation could be focused at the suspension.…”

“…Thus, the MB dye solution becomes colorless due to the degradation of aromatic rings. Additionally, it was shown that the importance of the participation of certain species decreases in the following order: (e − ) > ( • O 2 − ) > ( • OH) > (h + ) in the photocatalysis mechanism of composites under SSR [ 24 , 25 ].…”