A series of novel BiyXz-TiO2/SrTiO3 composites were prepared by multistep synthesis route. The asprepared photocatalysts were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS), Fourier transform infrared (FT-IR), Raman spectra and BET analysis. The photocatalytic activity test was performed in aqueous solution of phenol under the irradiation of visible light range ( ≥ 420 nm). Obtained results revealed that the BiOI TiO2/SrTiO3 sample exhibit the highest photocatalytic activity under visible irradiation (0.6 mol/dm3/min). Thus, it was demonstrated that modification of the TiO2/SrTiO3 microspheres by flowers-like structure made of bismuth oxyiodide resulted in enhancement of photocatalytic activity under visible light. The role of active species during the decomposition process of organic compound was investigated using different types of active species scavengers as well as electron paramagnetic resonance analysis (EPR). The study showed that in the BiOI TiO2/SrTiO3/Vis system the holes (h+) plays relevant role in phenol decomposition. Furthermore, the stability and recyclable properties of obtained BiOI TiO2/SrTiO3 sample were confirmed during three consecutive processes.
Autorzy
- mgr inż. Martyna Marchelek,
- Dr. Ewelina Grabowska,
- prof. dr hab. inż. Tomasz Klimczuk link otwiera się w nowej karcie ,
- dr hab. Wojciech Lisowski,
- Elio Giamello,
- Prof. dr hab. inż. Adriana Zaleska-Medynska
Informacje dodatkowe
- DOI
- Cyfrowy identyfikator dokumentu elektronicznego link otwiera się w nowej karcie 10.1016/j.apsusc.2017.11.139
- Kategoria
- Publikacja w czasopiśmie
- Typ
- artykuł w czasopiśmie wyróżnionym w JCR
- Język
- angielski
- Rok wydania
- 2018
