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Investigation of the applicability of TiO 2 , BiVO 4 , and WO 3 nanomaterials for advanced photocatalytic membranes used for oil‐in‐water emulsion separation

In the present study, a commercial TiO 2 , several BiVO 4 photocatalysts, a WO 3 nanomaterial, and their composites were used to prepare photocatalytic polyvinylidene fluoride (PVDF) ultrafilter membranes. Their photocatalytic activities and the effects of coatings on the filtration of oil‐in‐water...

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Published in:Asia-Pacific journal of chemical engineering 2020-09, Vol.15 (5)
Main Authors: Nascimben Santos, Erika, Ágoston, Áron, Kertész, Szabolcs, Hodúr, Cecilia, László, Zsuzsanna, Pap, Zsolt, Kása, Zsolt, Alapi, Tünde, Krishnan, S.A. Gokula, Arthanareeswaran, Gangasalam, Hernadi, Klara, Veréb, Gábor
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cited_by cdi_FETCH-LOGICAL-c1069-fa8cfdd06c6c74878da33cf48d25b7c538c4661b7a772e568472a258b442cf643
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container_title Asia-Pacific journal of chemical engineering
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creator Nascimben Santos, Erika
Ágoston, Áron
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Alapi, Tünde
Krishnan, S.A. Gokula
Arthanareeswaran, Gangasalam
Hernadi, Klara
Veréb, Gábor
description In the present study, a commercial TiO 2 , several BiVO 4 photocatalysts, a WO 3 nanomaterial, and their composites were used to prepare photocatalytic polyvinylidene fluoride (PVDF) ultrafilter membranes. Their photocatalytic activities and the effects of coatings on the filtration of oil‐in‐water emulsion (crude oil; c oil = 100 mg L −1 ) were investigated. Fluxes, filtration resistances, purification efficiencies, and fouling resistance abilities—like flux decay ratios (FDRs) and flux recovery ratios (FRRs)—were compared. The solar light‐induced photocatalytic decomposition of the foulants was also investigated. WO 3 was used as a composite component to suppress the electron–hole recombination with the goal of achieving higher photocatalytic activity, but the presence of WO 3 was not beneficial concerning the filtration properties. However, the application of TiO 2 , one of the investigated BiVO 4 photocatalysts, and their composites was also beneficial. In the case of the neat membrane, only 87 L m −2 h −1 flux was measured, whereas with the most beneficial BiVO 4 coating, 464 L m −2 h −1 flux was achieved. Pure BiVO 4 coating was more beneficial in terms of filtration properties, whereas pure TiO 2 coating proved to be more beneficial concerning the photocatalytic regeneration of the membrane. The TiO 2 (80%)/BiVO 4 (20%) composite was estimated to be the most beneficial combination taking into account both the aspects of photocatalytic activity and filtration properties.
doi_str_mv 10.1002/apj.2549
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title Investigation of the applicability of TiO 2 , BiVO 4 , and WO 3 nanomaterials for advanced photocatalytic membranes used for oil‐in‐water emulsion separation
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