Studies on novel BiyXz-TiO2/SrTiO3 composites: Surface properties and visible light-driven photoactivity

Martyna Marchelek; Ewelina Grabowska; Tomasz Klimczuk; Wojciech Lisowski; Elio Giamello; Adriana Zaleska-Medynska

doi:10.1016/j.apsusc.2017.11.139

Studies on novel BiyXz-TiO2/SrTiO3 composites: Surface properties and visible light-driven photoactivity

Abstract

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.

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Authors (6)

Martyna Marchelek mgr inż.
Ewelina Grabowska Dr.
Tomasz Klimczuk prof. dr hab. inż.
Wojciech Lisowski dr hab.
Elio Giamello
Adriana Zaleska-Medynska Prof. dr hab. inż.

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Keywords

FOTOKATALIZA

Details

Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: APPLIED SURFACE SCIENCE no. 435, pages 1174 - 1186,
ISSN: 0169-4332
Language:: English
Publication year:: 2018
Bibliographic description:: Marchelek M., Grabowska E., Klimczuk T., Lisowski W., Giamello E., Zaleska-Medynska A.: Studies on novel BiyXz-TiO2/SrTiO3 composites: Surface properties and visible light-driven photoactivity// APPLIED SURFACE SCIENCE. -Vol. 435, (2018), s.1174-1186
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.apsusc.2017.11.139
Verified by:: Gdańsk University of Technology