Version 1
: Received: 21 April 2024 / Approved: 22 April 2024 / Online: 22 April 2024 (18:36:38 CEST)
How to cite:
Vale, M.; Barrocas, B.T.; Serôdio, R.; Oliveira, M.C.; Lopes, J.M.; Marques, A.C. Robust photocatalytic MICROSCAFS® with interconnected macropores for sustainable solar-driven water purification. Preprints2024, 2024041455. https://doi.org/10.20944/preprints202404.1455.v1
Vale, M.; Barrocas, B.T.; Serôdio, R.; Oliveira, M.C.; Lopes, J.M.; Marques, A.C. Robust photocatalytic MICROSCAFS® with interconnected macropores for sustainable solar-driven water purification. Preprints 2024, 2024041455. https://doi.org/10.20944/preprints202404.1455.v1
Vale, M.; Barrocas, B.T.; Serôdio, R.; Oliveira, M.C.; Lopes, J.M.; Marques, A.C. Robust photocatalytic MICROSCAFS® with interconnected macropores for sustainable solar-driven water purification. Preprints2024, 2024041455. https://doi.org/10.20944/preprints202404.1455.v1
APA Style
Vale, M., Barrocas, B.T., Serôdio, R., Oliveira, M.C., Lopes, J.M., & Marques, A.C. (2024). Robust photocatalytic MICROSCAFS® with interconnected macropores for sustainable solar-driven water purification. Preprints. https://doi.org/10.20944/preprints202404.1455.v1
Chicago/Turabian Style
Vale, M., José M. Lopes and Ana C. Marques. 2024 "Robust photocatalytic MICROSCAFS® with interconnected macropores for sustainable solar-driven water purification" Preprints. https://doi.org/10.20944/preprints202404.1455.v1
Abstract
Advanced oxidation processes, including photocatalysis, have been proven effective at organic dye degradation. Tailored porous materials with regulated pore size, shape and morphology offer a sustainable solution to the water pollution problem, by acting as support materials to grafted photocatalytic nanoparticles (NPs). This research investigates the influence of pore and particle sizes of photocatalytic MICROSCAFS®, on the degradation of methyl orange (MO) in aqueous solution (10 mg/L). Photocatalytic MICROSCAFS® are made of binder-less supported P25 TiO2 NPs within MICROSCAFS®, which are silica-titania microspheres with controlled size and intercon-nected macroporosity, synthesized by an adapted sol-gel method that involves a polymeriza-tion-induced phase separation process. Photocatalytic experiments were done both in batch and flow reactors, these latter ones targeting real-life conditions. Photocatalytic degradation of 87% in 2 hours (batch) and 29% in 5 hours (flow), was achieved, using a calibrated solar light simulator (1 sun) and a photocatalyst/pollutant mass ratio of 23. This study introduces a novel flow kinetic model which provides the modeling and simulation of the photocatalytic MICROSCAFS® per-formance. A scavenger study was performed enabling in-depth mechanistic understanding. Fi-nally, the transformation products resulting from the MO photocatalytic degradation were elu-cidated by high-resolution mass spectrometry experiments and subjected to in-silico toxicity as-sessment.
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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