Efficient hybrid bionanocomposites based on iron-modified TiO2 for dye degradation via an adsorption-photocatalysis synergy under UV-Visible irradiations.

Environmental Science and Pollution Research International
Soulaima ChkiridaRachid Bouhfid

Abstract

To overcome the titanium oxide limitations, Fe2O3- and Fe3O4-modified TiO2 (3:1) nanoparticles were synthesized by a humid and solid path, respectively. These nanoparticles were embedded in sodium alginate biopolymer to prepare beads with efficient adsorption and photocatalytic behaviors in cationic dye degradation under both UV and visible irradiations. Operating conditions were investigated such as initial methylene blue (MB) concentration and contact time to evaluate their impact on the process. The bead recycling was also scrutinized. We have come to the conclusion that Fe2O3-modified TiO2-Alg displayed superiorities, including expanded responsive wavelength range in the visible region (up to 700 nm), narrower band gap (1.79 eV), and better efficiency for MB removal in terms of adsorption capacities and photocatalytic effectiveness under both UV and visible irradiations. Furthermore, these beads can be effortlessly recovered from the reaction medium after the photocatalytic process and reused up to 5 cycles without any noteworthy decline in their initial properties.

References

Mar 8, 2014·Environmental Science and Pollution Research International·Monique S CurcioMaria Cristina Canela
Sep 23, 2014·Environmental Science and Pollution Research International·Jamshaid RashidA Chianese
Jun 10, 2015·Environmental Science and Pollution Research International·B ChládkováD Lambropoulou
Apr 30, 2017·Journal of Photochemistry and Photobiology. B, Biology·Rabia IrshadSadia Nazir
Feb 9, 2019·International Journal of Biological Macromolecules·AbdulKarim-Talaq MohammadAli H Jawad

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Citations

Sep 26, 2021·Environmental Science and Pollution Research International·Yunlong Zhou, Meng Sun

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