Reusable Ag@TiO 2 -Based Photocatalytic Nanocomposite Membranes for Solar Degradation of Contaminants of Emerging Concern

Two significant limitations of using TiO nanoparticles for water treatment applications are reduced photocatalytic activity under visible radiation and difficulty recovering the particles after use. In this study, round-shaped Ag@TiO nanocomposites with a ≈21 nm diameter and a bandgap energy of 2.8...

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Bibliographic Details
Published inPolymers Vol. 13; no. 21
Main Authors Aoudjit, Lamine, Salazar, Hugo, Zioui, Djamila, Sebti, Aicha, Martins, Pedro Manuel, Lanceros-Mendez, Senentxu
Format Journal Article
LanguageEnglish
Published Switzerland 28.10.2021
Subjects
water remediation
micropollutants
metronidazole
ANFIS
photocatalysis
nanocomposite membrane
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Summary:Two significant limitations of using TiO nanoparticles for water treatment applications are reduced photocatalytic activity under visible radiation and difficulty recovering the particles after use. In this study, round-shaped Ag@TiO nanocomposites with a ≈21 nm diameter and a bandgap energy of 2.8 eV were synthesised by a deposition-precipitation method. These nanocomposites were immobilised into a porous poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) matrix and well-distributed within the pores. The photocatalytic activity of Ag@TiO /PVDF-HFP against metronidazole (MNZ) under solar radiation was evaluated. Further, an adaptive neuro-fuzzy inference system (ANFIS) was applied to predict the effect of four independent variables, including initial pollutant concentration, pH, light irradiation intensity, and reaction time, on the photocatalytic performance of the composite membrane on MNZ degradation. The 10% Ag@TiO /PVDF-HFP composite membrane showed a maximum removal efficiency of 100% after 5 h under solar radiation. After three use cycles, this efficiency remained practically constant, demonstrating the membranes' reusability and suitability for water remediation applications.
ISSN:2073-4360