Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO2 Composites for the Degradation of Sudan Blue II Dye

Guastaferro, Mariangela; Baldino, Lucia; Vaiano, Vincenzo; Cardea, Stefano; Reverchon, Ernesto

doi:10.3390/ma15248894

Open AccessArticle

Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO₂ Composites for the Degradation of Sudan Blue II Dye

by

Mariangela Guastaferro

¹,

Lucia Baldino

^1,2,*

,

Vincenzo Vaiano

^1,*

,

Stefano Cardea

¹

and

Ernesto Reverchon

^1,2

¹

Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy

²

C.U.G.RI., InterUniversity Research Center for the Prediction and Prevention of Major Hazards, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy

^*

Authors to whom correspondence should be addressed.

Materials 2022, 15(24), 8894; https://doi.org/10.3390/ma15248894

Submission received: 4 November 2022 / Revised: 8 December 2022 / Accepted: 9 December 2022 / Published: 13 December 2022

(This article belongs to the Special Issue Development and Application of Novel Membranes)

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Abstract

TiO₂-loaded poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-coHFP) membranes were produced by supercritical CO₂-assisted phase inversion. Three different TiO₂ loadings were tested: 10, 20, and 30 wt% with respect to the polymer. Increasing the TiO₂ amount from 10 wt% to 20 wt% in the starting solution, the transition from leafy-like to leafy-cellular morphology was observed in the section of the membrane. When 30 wt% TiO₂ was used, the entire membrane section showed agglomerates of TiO₂ nanoparticles. These polymeric membranes were tested to remove Sudan Blue II (SB) dye from aqueous solutions. The adsorption/photocatalytic processes revealed that membrane morphology and TiO₂ cluster size were the parameters that mainly affected the dye removal efficiency. Moreover, after five cycles of exposure of these membranes to UV light, SB removal was higher than 85%.

Keywords: TiO₂ nanoparticles; poly(vinylidene fluoride-co-hexafluoropropylene) membranes; Sudan Blue II dye; supercritical CO₂ assisted phase inversion; photocatalysis

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MDPI and ACS Style

Guastaferro, M.; Baldino, L.; Vaiano, V.; Cardea, S.; Reverchon, E. Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO₂ Composites for the Degradation of Sudan Blue II Dye. Materials 2022, 15, 8894. https://doi.org/10.3390/ma15248894

AMA Style

Guastaferro M, Baldino L, Vaiano V, Cardea S, Reverchon E. Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO₂ Composites for the Degradation of Sudan Blue II Dye. Materials. 2022; 15(24):8894. https://doi.org/10.3390/ma15248894

Chicago/Turabian Style

Guastaferro, Mariangela, Lucia Baldino, Vincenzo Vaiano, Stefano Cardea, and Ernesto Reverchon. 2022. "Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO₂ Composites for the Degradation of Sudan Blue II Dye" Materials 15, no. 24: 8894. https://doi.org/10.3390/ma15248894

APA Style

Guastaferro, M., Baldino, L., Vaiano, V., Cardea, S., & Reverchon, E. (2022). Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO₂ Composites for the Degradation of Sudan Blue II Dye. Materials, 15(24), 8894. https://doi.org/10.3390/ma15248894

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO₂ Composites for the Degradation of Sudan Blue II Dye

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