A massive amount of research has been done over the last three decades to develop photoactive materials which could be suitable for real-world use in water remediation sector. Water-floating photocatalysts could be one of the best options due to their technological characteristics in terms of efficiency and reasonability including a high oxygenation of the photocatalyst surface, a fully sunlight irradiation, easy recovery and reuse. In the present study, aerogel water-floating based materials were fabricated using poly(vinyl alcohol) and polyvinylidene fluoride as a polymer platform, and loaded with different semiconductors such as g-C3N4, MoO3, Bi2O3, Fe2O3 or WO3. The photocatalytic efficiencies of aerogel floating materials and the suspension of above-mentioned semiconductors were compared evaluating the photoreduction of Cr(VI) under visible light (λ > 420 nm). The results showed that Fe2O3 suspension was the most efficient but the slowest in floating system. On the contrary, g-C3N4 exhibited a good performance in suspension system, and on top of that it was very effective in floating system, wherein it ensures a total reduction of 10 ppm-Cr(VI) to Cr(III) within 20 min.

Comparison of the photoactivity of several semiconductor oxides in floating aerogel and suspension systems towards the reduction of Cr(VI) under visible light / R. Djellabi, X. Zhao, M.F. Ordonez, E. Falletta, C.L. Bianchi. - In: CHEMOSPHERE. - ISSN 0045-6535. - 281(2021 Oct). [10.1016/j.chemosphere.2021.130839]

Comparison of the photoactivity of several semiconductor oxides in floating aerogel and suspension systems towards the reduction of Cr(VI) under visible light

R. Djellabi
Primo
Investigation
;
M.F. Ordonez
Membro del Collaboration Group
;
E. Falletta
Penultimo
Validation
;
C.L. Bianchi
Ultimo
Supervision
2021

Abstract

A massive amount of research has been done over the last three decades to develop photoactive materials which could be suitable for real-world use in water remediation sector. Water-floating photocatalysts could be one of the best options due to their technological characteristics in terms of efficiency and reasonability including a high oxygenation of the photocatalyst surface, a fully sunlight irradiation, easy recovery and reuse. In the present study, aerogel water-floating based materials were fabricated using poly(vinyl alcohol) and polyvinylidene fluoride as a polymer platform, and loaded with different semiconductors such as g-C3N4, MoO3, Bi2O3, Fe2O3 or WO3. The photocatalytic efficiencies of aerogel floating materials and the suspension of above-mentioned semiconductors were compared evaluating the photoreduction of Cr(VI) under visible light (λ > 420 nm). The results showed that Fe2O3 suspension was the most efficient but the slowest in floating system. On the contrary, g-C3N4 exhibited a good performance in suspension system, and on top of that it was very effective in floating system, wherein it ensures a total reduction of 10 ppm-Cr(VI) to Cr(III) within 20 min.
Floating photocatalysts; Aerogel materials; Cr(VI) photoreduction; Photocatalysis;Water remediation;
Settore CHIM/04 - Chimica Industriale
Water decontamination by sunlight-driven floating photocatalytic systems (SUNFLOAT)
10-mag-2021
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/843774
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